Sample records for jacket type offshore

  1. Seismic Performance Evaluation of the Jacket Type Offshore Platforms through Incremental Dynamic Analysis considering Soil-Pile-Structure Interaction

    SciTech Connect

    Asgarian, Behrouz [K.N. Toosi University of Technology Tehran Iran (Iran, Islamic Republic of); Shokrgozar, Hamed R.; Talarposhti, Ali Shakeri [K.N. Toosi University of Technology, Tehran (Iran, Islamic Republic of)

    2008-07-08

    Of great interest in Performance-Based Earthquake Engineering (PBEE) is the accurate estimation of the seismic performance of structures. A performance prediction and evaluation procedure is based on nonlinear dynamics and reliability theory. In this method, a full integration over the three key stochastic models is as follow: ground motion hazard curve, nonlinear dynamic displacement demand, and displacement capacity. Further, both epistemic and aleatory uncertainties are evaluated and carried through the analysis.In this paper, jacket and soil-pile system have been modeled using Finite Element program (OpenSees) and the incremental dynamic analysis (IDA) are performed to investigate nonlinear behavior of offshore platforms. The system demand is determined by performing time history response analyses of the jacket under a suite of FEMA/SAC uniform hazard ground motions. The system capacity in terms of the drift ratio against incipient collapse is generally difficult to predict since the structural response goes into nonlinear range before collapse. All the analyses are performed in two directions and the results are compared with each others. The confidence level of a jacket in each direction for a given hazard level is calculated using the procedure described.

  2. Repairing an offshore jacket structure proves cost effective

    SciTech Connect

    Still, J.R.; Blackwood, V.

    2000-05-01

    During inclement weather in the southern North Sea, an off-shore supply boat collided with a 25-year-old gas production platform. The impact occurred just over 2 m (5.56 ft) from the lowest annual tide and was sufficient to buckle, then shear, one end of a horizontal bracing from the jacket leg and to cause further damage at a node joint. Inspection personnel performed an initial examination of the damage to the eight-leg jacket structure using rope access techniques (abseiling), which offered substantial cost saving over erecting scaffolding. A structural analysis confirmed the jacket's integrity was not impaired and loss of the horizontal bracing would not significantly affect the structure. The analysis also confirmed repair of the node weld cracks and of the sheared area on the leg should be performed as soon as practical. In the end, the repair went smoothly. The repair area was above the waterline, and the weather cooperated perfectly. The repairs were done using rope access techniques, and using austenitic electrodes reduced the possibility of HAZ hydrogen cracking. Nondestructive examination confirmed no cracking had been experienced and no other defects existed. Indeed, this methodology is considered extremely practical, cost effective and ideal for use on offshore structures--with damage close to the waterline, and with the need to execute immediate repairs.

  3. A Probabilistic Deformation Demand Model and Fragility Estimates for Asymmetric Offshore Jacket Platforms

    E-print Network

    Fallon, Michael Brooks

    2012-11-12

    to assess the deformation demand on asymmetric offshore jacket platforms subject to wave and current loadings. The probabilistic model is constructed by adding correction terms and a model error to an existing deterministic deformation demand model...

  4. SUBSPACE-BASED DETECTION OF FATIGUE DAMAGE ON JACKET SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES

    E-print Network

    Paris-Sud XI, Université de

    SUBSPACE-BASED DETECTION OF FATIGUE DAMAGE ON JACKET SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES turbine structures. Aim of the study was therefore to analyze the usability and effi- ciency structures of wind energy turbines. Based on results of an experimental fatigue test on a steel frame

  5. Differentiating between Underwater Construction Noise of Monopile and Jacket Foundations for Offshore Windmills: A Case Study from the Belgian Part of the North Sea

    PubMed Central

    Norro, Alain Michel Jules; Rumes, Bob; Degraer, Steven Johan

    2013-01-01

    Steel monopiles, jackets requiring four steel pinpiles, and gravity-based foundations were applied in offshore wind farms in the Belgian part of the North Sea. This paper compares the underwater noise generated during the piling activities of steel monopiles at the Belwind wind farm (Blighbank) with that of jacket pinpiles at the C-Power project (Thorntonbank). Underwater noise was measured at various distances from the pile driving location. The underwater noise was quantified by its zero to peak sound pressure level (Lz?p), unweighted sound exposure level (SEL), cumulative SEL, and 1/3 octave spectra. No significant differences in Lz?p could be demonstrated (monopile Lz?p: 179–194?dB?re 1??Pa, jacket Lz?p: 172–189?dB?re 1??Pa). SEL showed no statistical difference between monopile and jacket and varied between 145 and 168?dB?re 1??Pa2s. Furthermore, near identical spectra were measured for both types of piling. Piling of the jacket pinpiles took, however, about 2.5 times the time of the monopile. When standardised to megawatt installed per foundation both types of piling scored near equally. As an illustration, the radius of major behavioural disturbance (Lp?p = 155?dB?re 1??Pa) in the harbour porpoise Phocoena phocoena was estimated by a model at 16?km for monopiles and at 8?km for jacket. PMID:23576910

  6. Experimental research on fatigue property of steel rubber vibration isolator for offshore jacket platform in cold environment

    Microsoft Academic Search

    Yongjun Xu; Yubiao Liu; Changzhen Kan; Zhonghan Shen; Zhongmin Shi

    2009-01-01

    Jacket platform is the most widely used offshore platform. Steel rubber vibration isolator and damping isolation system are often used to reduce or isolate the ice-induced and seismic-induced vibrations. The previous experimental and theoretical studies concern mostly with dynamic properties, vibration isolation schemes and vibration-reduction effectiveness analysis. In this paper, the experiments on steel rubber vibration isolator were carried out

  7. The role of redundancy in jacket-type offshore platforms

    E-print Network

    Womble, J'nina Elaine

    1988-01-01

    of the . components is what should (0) 6 C (b) FIGURE 2. 1- EXAMPLE OF (a) A SERIES SYSTEM AND (b) A PARALLEL SYSTEM FIGURE 2. 2- A STRUCTURE EXHIBITING SERIES AND PARALLEL BEHAVIOR 14 be studied in a structural system, rather than the behavior... failure element is taken into account by modelling the structural system as a series system with the failure elements as elements of the 23 system. Figure 2. 6 shows how the structure in Figure 2. 4 is modelled in this manner. The reliability...

  8. Optimisation and evaluation of pre-design models for offshore wind turbines with jacket support structures and their influence on integrated load simulations

    NASA Astrophysics Data System (ADS)

    Schafhirt, S.; Kaufer, D.; Cheng, P. W.

    2014-12-01

    In recent years many advanced load simulation tools, allowing an aero-servo-hydroelastic analyses of an entire offshore wind turbine, have been developed and verified. Nowadays, even an offshore wind turbine with a complex support structure such as a jacket can be analysed. However, the computational effort rises significantly with an increasing level of details. This counts especially for offshore wind turbines with lattice support structures, since those models do naturally have a higher number of nodes and elements than simpler monopile structures. During the design process multiple load simulations are demanded to obtain an optimal solution. In the view of pre-design tasks it is crucial to apply load simulations which keep the simulation quality and the computational effort in balance. The paper will introduce a reference wind turbine model consisting of the REpower5M wind turbine and a jacket support structure with a high level of detail. In total twelve variations of this reference model are derived and presented. Main focus is to simplify the models of the support structure and the foundation. The reference model and the simplified models are simulated with the coupled simulation tool Flex5-Poseidon and analysed regarding frequencies, fatigue loads, and ultimate loads. A model has been found which reaches an adequate increase of simulation speed while holding the results in an acceptable range compared to the reference results.

  9. The heat transfer characteristics of the jacket-type radial heat pipe

    NASA Astrophysics Data System (ADS)

    Jiao, Yonggang; Xia, Guodong; Wang, Dan

    2013-07-01

    A simple, rapid mathematical model to calculate the non-steady-state startup process of the jacket-type radial heat pipe is presented in this paper. The model is based on the special structure and using conditions of the jacket-type radial heat pipe, the vapor temperature in heat pipe only changes over time. The startup performance of the heat pipe with variation input heat flux and the filling rate is analyzed. The results manifest that the filling rate increased will reduce the maximum operating temperature of the heat pipe and shorten the startup time of the heat pipe. With the increase of input heat flux, the operating temperature increases and the time to reach the steady state of the heat pipe is added. The total thermal resistance of heat pipe decreases with the increase of the input heat flux and filling rate. The variation of the local convective heat transfer coefficient and the maximum temperature of the water are investigated with different cooling water inlet conditions.

  10. Fire Protection Jacket

    NASA Technical Reports Server (NTRS)

    1991-01-01

    NERAC, Inc., Tolland, CT, aided Paul Monroe Engineering, Orange, CA, in the development of their PC1200 Series Fire Protection Jacket that protects the oil conduit system on an offshore drilling platform from the intense hydrocarbon fires that cause buckling and could cause structural failure of the platform. The flame-proof jacketing, which can withstand temperatures of 2000 degrees Fahrenheit for four hours or more, was developed from a combination of ceramic cloth (similar to the ceramic in Space Shuttle tiles), and laminates used in space suits.

  11. Jacketed lamp bulb envelope

    DOEpatents

    MacLennan, Donald A. (Gaithersburg, MD); Turner, Brian P. (Damascus, MD); Gitsevich, Aleksandr (Gaithersburg, MD); Bass, Gary K. (Mt. Airy, MD); Dolan, James T. (Frederick, MD); Kipling, Kent (Gaithersburg, MD); Kirkpatrick, Douglas A. (Great Falls, VA); Leng, Yongzhang (Damascus, MD); Levin, Izrail (Silver Spring, MD); Roy, Robert J. (Frederick, MD); Shanks, Bruce (Gaithersburg, MD); Smith, Malcolm (Alexandria, VA); Trimble, William C. (Columbia, MD); Tsai, Peter (Olney, MD)

    2001-01-01

    A jacketed lamp bulb envelope includes a ceramic cup having an open end and a partially closed end, the partially closed end defining an aperture, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material at least partially covering a portion of the bulb not abutting the aperture. The reflective ceramic material may substantially fill an interior volume of the ceramic cup not occupied by the bulb. The ceramic cup may include a structural feature for aiding in alignment of the jacketed lamp bulb envelope in a lamp. The ceramic cup may include an external flange about a periphery thereof. One example of a jacketed lamp bulb envelope includes a ceramic cup having an open end and a closed end, a ceramic washer covering the open end of the ceramic cup, the washer defining an aperture therethrough, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material filling an interior volume of the ceramic cup not occupied by the bulb. A method of packing a jacketed lamp bulb envelope of the type comprising a ceramic cup with a lamp bulb disposed therein includes the steps of filling the ceramic cup with a flowable slurry of reflective material, and applying centrifugal force to the cup to pack the reflective material therein.

  12. Postexercise Cooling Rates in 2 Cooling Jackets

    PubMed Central

    Brade, Carly; Dawson, Brian; Wallman, Karen; Polglaze, Ted

    2010-01-01

    Abstract Context: Cooling jackets are a common method for removing stored heat accumulated during exercise. To date, the efficiency and practicality of different types of cooling jackets have received minimal investigation. Objective: To examine whether a cooling jacket containing a phase-change material (PC17) results in more rapid postexercise cooling than a gel cooling jacket and a no-jacket (control) condition. Design: Randomized, counterbalanced design with 3 experimental conditions. Setting: Participants exercised at 75% V?o2max workload in a hot climate chamber (temperature ?=? 35.0 ± 1.4°C, relative humidity ?=? 52 ± 4%) for 30 minutes, followed by postexercise cooling for 30 minutes in cool laboratory conditions (ambient temperature ?=? 24.9 ± 1.8°C, relative humidity ?=? 39% ± 10%). Patients or Other Participants: Twelve physically active men (age ?=? 21.3 ± 1.1 years, height ?=? 182.7 ± 7.1 cm, body mass ?=? 76.2 ± 9.5 kg, sum of 6 skinfolds ?=? 50.5 ± 6.9 mm, body surface area ?=? 1.98 ± 0.14 m2, V?o2max ?=? 49.0 ± 7.0 mL·kg?1·min?1) participated. Intervention(s): Three experimental conditions, consisting of a PC17 jacket, a gel jacket, and no jacket. Main Outcome Measure(s): Core temperature (TC), mean skin temperature (TSk), and TC cooling rate (°C/min). Results: Mean peak TC postexercise was 38.49 ± 0.42°C, 38.57 ± 0.41°C, and 38.55 ± 0.40°C for the PC17 jacket, gel jacket, and control conditions, respectively. No differences were observed in peak TC cooling rates among the PC17 jacket (0.038 ± 0.007°C/min), gel jacket (0.040 ± 0.009°C/min), and control (0.034 ± 0.010°C/min, P > .05) conditions. Between trials, no differences were calculated for mean TSk cooling. Conclusions: Similar cooling rates for all 3 conditions indicate that there is no benefit associated with wearing the PC17 or gel jacket. PMID:20210620

  13. Protective jacket assembly

    SciTech Connect

    Kendall, C.E. Jr.; Moore, B.B.

    1986-09-16

    For use in production of oil, gas and other fluid materials from subsurface formations, a crush and abrasion resistant protective jacket assembly adapted to be suspended in an oil or gas well is described which may have a corrosive, high temperature, high pressure gas and/or liquid environment. The protective jacket assembly is sufficiently flexible to permit reeling and unreeling during manufacture and installation in a well bore and bending to accommodate well bore deviation. A method is described of manufacturing a protective jacket assembly having longitudinal structural elements connected at opposed sides thereof.

  14. Variable pressure thermal insulating jacket

    DOEpatents

    Nelson, Paul A. (Wheaton, IL); Malecha, Richard F. (Naperville, IL); Chilenskas, Albert A. (Chicago, IL)

    1994-01-01

    A device for controlled insulation of a thermal device. The device includes a thermal jacket with a closed volume able to be evacuated to form an insulating jacket around the thermal source. A getter material is in communcation with the closed volume of the thermal jacket. The getter material can absorb and desorb a control gas to control gas pressure in the volume of the thermal jacket to control thermal conductivity in the thermal jacket.

  15. Variable pressure thermal insulating jacket

    DOEpatents

    Nelson, P.A.; Malecha, R.F.; Chilenskas, A.A.

    1994-09-20

    A device for controlled insulation of a thermal device is disclosed. The device includes a thermal jacket with a closed volume able to be evacuated to form an insulating jacket around the thermal source. A getter material is in communication with the closed volume of the thermal jacket. The getter material can absorb and desorb a control gas to control gas pressure in the volume of the thermal jacket to control thermal conductivity in the thermal jacket. 10 figs.

  16. Regeneratively Cooled Porous Media Jacket

    NASA Technical Reports Server (NTRS)

    Mungas, Greg (Inventor); Fisher, David J. (Inventor); London, Adam Pollok (Inventor); Fryer, Jack Merrill (Inventor)

    2013-01-01

    The fluid and heat transfer theory for regenerative cooling of a rocket combustion chamber with a porous media coolant jacket is presented. This model is used to design a regeneratively cooled rocket or other high temperature engine cooling jacket. Cooling jackets comprising impermeable inner and outer walls, and porous media channels are disclosed. Also disclosed are porous media coolant jackets with additional structures designed to transfer heat directly from the inner wall to the outer wall, and structures designed to direct movement of the coolant fluid from the inner wall to the outer wall. Methods of making such jackets are also disclosed.

  17. FRP jacketed concrete under uniaxial compression

    Microsoft Academic Search

    Antonio Nanni; Nick M. Bradford

    1995-01-01

    The purpose of this investigation was to develop experimental data and check the validity of existing analytical models for the behaviour of concrete members jacketed (i.e., laterally confined) with fibre-reinforced plastic (frp) materials. The test specimens consisted of 150 × 300 mm cylinders of normal weight, normal strength concrete. Specimens loaded statically under uniaxial compression were studied. Three different types

  18. BAYESIAN UPDATING OF PROBABILISTIC TIME-DEPENDENT FATIGUE MODEL: APPLICATION TO JACKET FOUNDATIONS OF WIND TURBINES

    E-print Network

    Boyer, Edmond

    algorithm. KEYWORDS: Fatigue, Damage, Reliability, Bayesian updating. INTRODUCTION In offshore wind turbines consequences are much less than in Oil and Gas industry. For the design of offshore steel structures, fatigueBAYESIAN UPDATING OF PROBABILISTIC TIME-DEPENDENT FATIGUE MODEL: APPLICATION TO JACKET FOUNDATIONS

  19. Idealized WRF model sensitivity simulations of sea breeze types and their effects on offshore windfields

    NASA Astrophysics Data System (ADS)

    Steele, C. J.; Dorling, S. R.; von Glasow, R.; Bacon, J.

    2013-01-01

    The behaviour and characteristics of the marine component of sea breeze cells have received little attention relative to their onshore counterparts. Yet there is a growing interest and dependence on the offshore wind climate from, for example, a wind energy perspective. Using idealized model experiments, we investigate the sea breeze circulation at scales which approximate to those of the southern North Sea, a region of major ongoing offshore wind farm development. We also contrast the scales and characteristics of the pure and the little known corkscrew and backdoor sea breeze types, where the type is pre-defined by the orientation of the synoptic scale flow relative to the shoreline. We find, crucially, that pure sea breezes, in contrast to corkscrew and backdoor types, can lead to substantial wind speed reductions offshore and that the addition of a second eastern coastline emphasises this effect through generation of offshore "calm zones". The offshore extent of all sea breeze types is found to be sensitive to both the influence of Coriolis acceleration and to the boundary layer scheme selected. These extents range, for example for a pure sea breeze produced in a 2 m s-1 offshore gradient wind, from 0 km to 21 km between the Mellor-Yamada-Nakanishi-Niino and the Yonsei State University schemes respectively. The corkscrew type restricts the development of a backdoor sea breeze on the opposite coast and is also capable of traversing a 100 km offshore domain even under high along-shore gradient wind speed (>15 m s-1) conditions. Realistic variations in sea surface skin temperature and initializing vertical thermodynamic profile do not significantly alter the resulting circulation, though the strengths of the simulated sea breezes are modulated if the effective land-sea thermal contrast is altered. We highlight how sea breeze impacts on circulation need to be considered in order to improve the accuracy of both assessments of the offshore wind energy climate and forecasts of wind energy output.

  20. 46 CFR 117.71 - Life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Shipping 4 2013-10-01 2013-10-01 false Life jackets. 117.71 Section 117.71 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.71 Life jackets. (a) An...

  1. 46 CFR 117.71 - Life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Shipping 4 2014-10-01 2014-10-01 false Life jackets. 117.71 Section 117.71 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.71 Life jackets. (a) An...

  2. 46 CFR 117.71 - Life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Shipping 4 2011-10-01 2011-10-01 false Life jackets. 117.71 Section 117.71 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.71 Life jackets. (a) An...

  3. 46 CFR 117.71 - Life jackets.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Shipping 4 2010-10-01 2010-10-01 false Life jackets. 117.71 Section 117.71 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.71 Life jackets. (a) An...

  4. 46 CFR 117.71 - Life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Shipping 4 2012-10-01 2012-10-01 false Life jackets. 117.71 Section 117.71 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.71 Life jackets. (a) An...

  5. Wave-PV hybrid generation system carried in the offshore floating type wave power device \\

    Microsoft Academic Search

    H. Osawa; T. Miyazaki

    2004-01-01

    Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has been engaged in research and development of ocean-wave energy extraction technology for many years now. In particular, work began in 1987 an offshore floating type wave power device called \\

  6. The Seismic Reliability of Offshore Structures Based on Nonlinear Time History Analyses

    SciTech Connect

    Hosseini, Mahmood [Associate Professor, Civil Engineering Department, Graduate School, Tehran South Branch of the Islamic Azad University (IAU), Jamalzadeh St., Keshsavarz Blvd, Tehran 14187 (Iran, Islamic Republic of); Karimiyani, Somayyeh [Graduate Student, Civil Engineering Department, Graduate School, Tehran South Branch of the Islamic Azad University (IAU), Jamalzadeh St., Keshsavarz Blvd, Tehran 14187 (Iran, Islamic Republic of); Ghafooripour, Amin [Assistant Professor, Civil Engineering Department, Tehran Central Branch of the Islamic Azad University (IAU), Tehran (Iran, Islamic Republic of); Jabbarzadeh, Mohammad Javad [PhD Student, Graduate Program, International Institute of Earthquake Engineering and Seismology (IIEES), P.O. Box 19395/3913, Tehran (Iran, Islamic Republic of)

    2008-07-08

    Regarding the past earthquakes damages to offshore structures, as vital structures in the oil and gas industries, it is important that their seismic design is performed by very high reliability. Accepting the Nonlinear Time History Analyses (NLTHA) as the most reliable seismic analysis method, in this paper an offshore platform of jacket type with the height of 304 feet, having a deck of 96 feet by 94 feet, and weighing 290 million pounds has been studied. At first, some Push-Over Analyses (POA) have been preformed to recognize the more critical members of the jacket, based on the range of their plastic deformations. Then NLTHA have been performed by using the 3-components accelerograms of 100 earthquakes, covering a wide range of frequency content, and normalized to three Peak Ground Acceleration (PGA) levels of 0.3 g, 0.65 g, and 1.0 g. By using the results of NLTHA the damage and rupture probabilities of critical member have been studied to assess the reliability of the jacket structure. Regarding that different structural members of the jacket have different effects on the stability of the platform, an 'importance factor' has been considered for each critical member based on its location and orientation in the structure, and then the reliability of the whole structure has been obtained by combining the reliability of the critical members, each having its specific importance factor.

  7. 46 CFR 117.75 - Life jacket lights.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.75 Life jacket lights. (a) Each life jacket carried on a vessel on an oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with Subpart...

  8. 46 CFR 117.75 - Life jacket lights.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.75 Life jacket lights. (a) Each life jacket carried on a vessel on an oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with Subpart...

  9. 46 CFR 117.75 - Life jacket lights.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.75 Life jacket lights. (a) Each life jacket carried on a vessel on an oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with Subpart...

  10. 46 CFR 117.75 - Life jacket lights.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.75 Life jacket lights. (a) Each life jacket carried on a vessel on an oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with Subpart...

  11. 46 CFR 117.75 - Life jacket lights.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.75 Life jacket lights. (a) Each life jacket carried on a vessel on an oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with Subpart...

  12. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Jackets § 180.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  13. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Jackets § 180.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  14. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Jackets § 180.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  15. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Jackets § 117.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  16. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Jackets § 117.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  17. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Jackets § 117.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  18. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Jackets § 180.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  19. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Jackets § 117.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  20. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Jackets § 117.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  1. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Jackets § 180.78 Stowage of life jackets. (a) General...otherwise stated in this section, life jackets must be stored in convenient...distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be...

  2. THE JACKET LAYER IN SASSAFRAS

    Microsoft Academic Search

    JOHN H. SCHAFFNER

    In the ovules of some angiosperms a definite nutritive tissue invests the embryo-sac, while in others no such layer exists. This nutritive jacket appears in all cases to be simply a modifica- tion of one or more layers of cells on the inner wall of the ovule. It is purely a physiological tissue and is usually described as consisting of

  3. Offshore medicine.

    PubMed

    Baker, D

    2001-03-01

    Offshore life can be refreshing for medics who are looking for a little change of pace; however, it is not for everyone. Working offshore can be the easiest or most boring job you'll ever have. It takes a specific type of medic to fit this mold. So, if you are considering a career in the offshore field, take all of the above into consideration. You are not just making a change in jobs, but a change in lifestyle. Once you become accustomed to this lifestyle, it will be hard to go back to the everyday hustle and bustle of the streets. For more information about working offshore, contact Acadian Contract Services at 800/259-333, or visit www.acadian.com. PMID:11258303

  4. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  5. Shorting pipeline and jacket cathodic protection systems

    Microsoft Academic Search

    W. H. Thomason; S. Evans; I. J. Rippon; A. E. Maurin

    1993-01-01

    The benefits of shorting pipeline and jacket cathodic protection (CP) systems for the external protection of subsea pipelines based on data from operations in the Gulf of Mexico, Persian Gulf, North Sea, and Indonesia are discussed. Shorting, as opposed to traditional electrical isolation, is cost effective because CP surveys and future retrofits are greatly simplified. Jacket CP systems can provide

  6. 46 CFR 180.75 - Life jacket lights.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.75 Life jacket lights. (a) Each life jacket carried on a vessel on oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with § 161.012...

  7. 46 CFR 180.75 - Life jacket lights.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.75 Life jacket lights. (a) Each life jacket carried on a vessel on oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with § 161.012...

  8. 46 CFR 180.75 - Life jacket lights.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.75 Life jacket lights. (a) Each life jacket carried on a vessel on oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with § 161.012...

  9. 46 CFR 180.75 - Life jacket lights.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.75 Life jacket lights. (a) Each life jacket carried on a vessel on oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with § 161.012...

  10. 46 CFR 180.75 - Life jacket lights.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.75 Life jacket lights. (a) Each life jacket carried on a vessel on oceans, coastwise, or Great Lakes route, must have a life jacket light approved in accordance with § 161.012...

  11. A study of the development of a new type of bulb bracket for offshore structures using suitable casting steel

    NASA Astrophysics Data System (ADS)

    Kim, Tae-Won; Kang, Chung-Gil; Park, Sang-Sik

    2010-06-01

    In this study, the optimum structural design of brackets for offshore structures was carried out through the ANSYS program. We wished to propose a new type of bulb bracket made by a casting process compared with the built-up type of bracket. For a better structural design of the bracket, we can't adopt face plate but stiffener and circular type shape at the diagonal surface line. Under the new type of bulb bracket made by a casting process, it was possible to reduce the size by about 30% and the weight by about 50% compared with the face-plate type of bracket.

  12. 69kV High-Pressure Oil-Filled Pipe-Type Submarine Lines to Offshore Drilling Islands

    Microsoft Academic Search

    William Torok

    1969-01-01

    A dual 69-kV high-pressure oil-filled pipe-type cable system was recently installed by the Southern California Edison Company, Los Angeles, Calif., to serve four offshore oil drilling islands in Long Beach Harbor. Each line is capable of carrying the entire load with parallel line out of service. A submarine pipeline was severed and repaired. Cable pulls, believed to be the longest

  13. Extending cable life with better jackets

    SciTech Connect

    NONE

    1995-05-01

    Better materials may result from a $1.1 million research program funded by the Electric Power Research Institute, Palo Alto, California and awarded to Southwire Co., Carrollton, Ga. The University of Connecticut`s Electrical Insulation Center (EIRC) will assist Southwire in testing the results of a recent study that found a promising new way to improve the protective jackets on underground power cables. EIRC`s Director Matthew Mashikian said, {open_quotes}Extending the life of power cables with a better jacket is worth millions to utility companies and their customers.{close_quotes} EIRC has a patent pending on a method of using chemical scavengers to reduce the presence of ions in groundwater that can penetrate a power cable`s jacket and invade the insulation.

  14. Impact analysis of spent fuel jacket assemblies

    SciTech Connect

    Aramayo, G.A.

    1994-06-01

    As part of the analyses performed in support of the reracking of the High Flux Isotope Reactor pool, it became necessary to prove the structural integrity of the spent fuel jacket assemblies subjected to gravity drop that result from postulated accidents associated with the handling of these assemblies while submerged in the pool. The spent fuel jacket assemblies are an integral part of the reracking project, and serve to house fuel assemblies. The structure integrity of the jacket assemblies from loads that result from impact from a height of 10 feet onto specified targets has been performed analytically using the computer program LS-DYNA3D. Nine attitudes of the assembly at the time of impact have been considered. Results of the analyses show that there is no failure of the assemblies as a result of the impact scenarios considered.

  15. HUNTER 10, TRUFLO GONDOLA WEIGHTS AND JACKET. PIVOTING ARMS RAISE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HUNTER 10, TRUFLO GONDOLA WEIGHTS AND JACKET. PIVOTING ARMS RAISE THE JACKET AND WEIGHTS. A PNEUMATIC SHOVEL PUSHES THE MORE RECENTLY POURED MOLD INTO THE COOLED MOLD, FORCING THE LATTER ONTO THE VIBRATING SHAKEOUT CONVEYOR AND LEAVING A SPACE UNDER THE RAISED JACKET AND WEIGHTS FOR A FRESHLY MADE UNPOURED MOLD. - Southern Ductile Casting Company, Casting, 2217 Carolina Avenue, Bessemer, Jefferson County, AL

  16. Jacketed cryogenic piping is stress relieved

    NASA Technical Reports Server (NTRS)

    Bowers, W. M.

    1967-01-01

    Jacketed design of piping used to transfer cryogenic fluids, relieves severe stresses associated with the temperature gradients that occur during transfer cycles and ambient periods. The inner /transfer/ pipe is preloaded in such a way that stress relief takes place automatically as cycling occurs.

  17. Engineering jackets (one from each decade)

    E-print Network

    Haykin, Simon

    · Engineering jackets (one from each decade) · Historical red suits (in good condition) · Print and a living wall of history. ACADEMICS · Textbooks · Tests or midterms · Computer files on USB · Bandannas · Pictures · Plumbline · An actual red suit · Kipling pranks · Fireball photos · Yearbook ARTS

  18. Proceedings of the 22nd annual offshore technology conference

    SciTech Connect

    Not Available

    1990-01-01

    This book contains the proceedings of the 22nd annual offshore technology conference, Volume 3. Topics covered include: Innovation in concrete gravity platform substructures; the Ravensburn north platform and beyond; Development of the ROV - replaceable control valves; Structure-induced seafloor scour; Vessel impact design for steel jackets; and A new approach for finger storage slug catcher design.

  19. Vacuum-jacketed hydrofluoric acid solution calorimeter

    USGS Publications Warehouse

    Robie, R.A.

    1965-01-01

    A vacuum-jacketed metal calorimeter for determining heats of solution in aqueous HF was constructed. The reaction vessel was made of copper and was heavily gold plated. The calorimeter has a cooling constant of 0.6 cal-deg -1-min-1, approximately 1/4 that of the air-jacketed calorimeters most commonly used with HF. It reaches equilibrium within 10 min after turning off the heater current. Measurements of the heat of solution of reagent grade KCl(-100 mesh dried 2 h at 200??C) at a mole ratio of 1 KCl to 200 H2O gave ??H = 4198??11 cal at 25??C. ?? 1965 The American Institute of Physics.

  20. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET (Size: Large)

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  1. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET (Size: XX Large)

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  2. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET (Size: Small)

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  3. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET (Size: X Large)

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  4. JOHN GLENN CENTER FOR SCIENCE EDUCATION JACKET (Size: Medium)

    NSDL National Science Digital Library

    1900-01-01

    100% nylon, water repellent Taslan Jacket. Taffeta mesh lined jacket and sleeves, with 2 front zip pockets. Embroidered with the JOHN GLENN CENTER FOR SCIENCE EDUCATION logo. Available in Adult sizes: Small, Medium, Large, X Large, XX Large. All proceeds from the sale of this item go to fund the JOHN GLENN CENTER FOR SCIENCE EDUCATION .

  5. Reusable neoprene jacket protects parts for chemical milling

    NASA Technical Reports Server (NTRS)

    1965-01-01

    Reusable neoprene jacket is used to prepare metal part or panel for chemical milling. Jacket covers back and upper rim of part and is sealed before the masking solution is applied to surface to be milled. This reduces amount of masking material required for milling identical parts and increases production.

  6. Offshore Technology

    NSDL National Science Digital Library

    Offshore Technology is a Web site specifically geared for the offshore oil and gas industry. The highlight of the site is the Industry Projects link, which gives information about offshore drilling projects from around the world. Sites are categorized geographically and include description of the project, information on the geology of the area, drilling history of the site, wellhead platform, pipeline information, and much more. Other links on the main page include an A to Z listing of contractors and suppliers, exhibition and conference information, and other helpful resources for the offshore drilling professional and researcher.

  7. Ported jacket for use in deformation measurement apparatus

    DOEpatents

    Wagner, Leslie A. (Rapid City, SD); Senseny, Paul E. (Rapid City, SD); Mellegard, Kirby D. (Rapid City, SD); Olsberg, Steven B. (Rapid City, SD)

    1990-01-01

    A device for allowing deformation measurement of a jacketed specimen when the specimen is loaded includes an elastomeric specimen container or jacket surrounding a specimen while the specimen is being loaded by a test apparatus. The specimen jacket wall is compressible, and the wall follows and allows deformation of the specimen. The jacket wall of compressible material is provided with at least one opening and a thin layer or shim of substantially non-compressible (metal) material covers and seals this opening. An extensometer is then positioned with its specimen engaging contact members engaging the substantially non-compressible material to measure the deformation of the specimen when the specimen is loaded, without compressibility effects of the jacket.

  8. Ported jacket for use in deformation measurement apparatus

    DOEpatents

    Wagner, L.A.; Senseny, P.E.; Mellegard, K.D.; Olsberg, S.B.

    1990-03-06

    A device for allowing deformation measurement of a jacketed specimen when the specimen is loaded includes an elastomeric specimen container or jacket surrounding a specimen while the specimen is being loaded by a test apparatus. The specimen jacket wall is compressible, and the wall follows and allows deformation of the specimen. The jacket wall of compressible material is provided with at least one opening and a thin layer or shim of substantially non-compressible (metal) material which covers and seals this opening. An extensometer is then positioned with its specimen engaging contact members engaging the substantially non-compressible material to measure the deformation of the specimen when the specimen is loaded, without compressibility effects of the jacket. 9 figs.

  9. Optical fiber magnetic field sensors with ceramic magnetostrictive jackets.

    PubMed

    Sedlar, M; Paulicka, I; Sayer, M

    1996-09-20

    Optical fibers coated by magnetostrictive ceramic films were tested with a Mach-Zehnder interferometer in an open-loop mode. The sensors exhibited excellent linearity and good sensitivity. The response of ceramic-jacketed fibers was not affected by small dc fluctuations that are due to the linear behavior of tested ceramic coatings in low magnetic fields. Tested ceramic materials included magnetite, ?-Fe(2) O(3), nickel ferrite, and cobalt-doped nickel ferrite (NCF2) jackets. The latter showed the best performance. A minimum detectable field of 3.2 × 10(-3) A/m for optical fiber jacketed with 2-?m-thick and 1-m-long NCF2 material has been achieved. The capability of detecting magnetic fields as low as 2.6 × 10(-7) A/m with a 10-?m-thick cobalt-doped nickel ferrite jacket is proposed. PMID:21127528

  10. Technique cuts time and cost of bending jacketed piping

    NASA Technical Reports Server (NTRS)

    Gardner, J. N.

    1967-01-01

    Technique uses a stiff medium in the annular space between inner and outer pipes of jacketed piping in transfer lines. The process eliminates splitting and welding and makes possible the use of standard pipe-bending tools.

  11. Calibration and Validation of a Spar-Type Floating Offshore Wind Turbine Model using the FAST Dynamic Simulation Tool: Preprint

    SciTech Connect

    Browning, J. R.; Jonkman, J.; Robertson, A.; Goupee, A. J.

    2012-11-01

    In 2007, the FAST wind turbine simulation tool, developed and maintained by the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL), was expanded to include capabilities that are suitable for modeling floating offshore wind turbines. In an effort to validate FAST and other offshore wind energy modeling tools, DOE funded the DeepCwind project that tested three prototype floating wind turbines at 1/50th scale in a wave basin, including a semisubmersible, a tension-leg platform, and a spar buoy. This paper describes the use of the results of the spar wave basin tests to calibrate and validate the FAST offshore floating simulation tool, and presents some initial results of simulated dynamic responses of the spar to several combinations of wind and sea states.

  12. Comparison of biomechanical behavior between a cast material torso jacket and a polyethylene based jacket

    PubMed Central

    2015-01-01

    Background Numerous designs are used to the treatment of Early Onset Scoliosis. For example, a Thoraco-Lumbo-Sacral Orthosis (TLSO) is constructed using Polyethylene (PE). In addition, a series of castings has been implemented using cast material (3M, BSN Medical). The cast material has some significant advantages over the PE design including: growth preserving, improved compliance, decreased invasiveness, delaying or avoiding surgery, and the ability to allow the skin to breathe. However, the mechanical effectiveness of the cast material brace as compared to the TLSO is unknown, thus providing the objective of this study. Methods A total of 23 standardized tensile tests were performed on the Delta-Cast Soft® and 3MTM ScotchcastTM Plus Casting Tape in order to obtain mechanical properties (Young’s and shear moduli and Poisson ratios). Using a radiograph of a thoracic spine, the size of twelve vertebrae and eleven intervertebral discs were measured and used to create a finite element spine model. Simulations using this model were used to establish mechanical loads which were then applied to finite element models of the TLSO and cast jacket. The thicknesses and number of material layers was varied in these models. Multiple simulations were performed. Results It was found that a 6.6.mm thick cast jacket made of Delta-Cast Soft® had a maximum deformation of 4.7 mm, a maximum stress of 2.9 MPa and a structural factor of safety of 5.71. On the other hand, a 4 mm thick jacket made of PE had a maximum deformation of 2 mm, a maximum stress of 8.9 MPa and a structural factor of safety of 2.70. The cast jacket was 3.5 times lighter and had a material of cost 1/5 of the PE brace. Conclusions Based on the results, either design will generate the proper constraint forces to maintain spinal correction. But, based on the design parameters (thickness, mechanical properties, structural factor of safety and cost) the brace made of cast material, though slightly thicker has superior structural and cost benefits. Thus, from the biomechanical point of view, the cast brace is more efficient than the PE brace. PMID:25815054

  13. Turbulator for a liner cooling jacket

    NASA Technical Reports Server (NTRS)

    Hoag, Kevin L. (Inventor)

    1995-01-01

    A turbulator for a liner cooling jacket includes a metal panel which is suitable to be coiled into a generally cylindrical shape so as to be placed in a relief area between an engine cylinder block and a cylinder liner. The relief area may be machined into either the block or the cylinder liner and the metal panel is formed with a pattern of protuberances shaped like corrugations. In one embodiment, the corrugations have a shape similar to a sine wave and are arranged in a plurality of generally parallel axial segments. The corrugation wave pattern of one segment may be the same as its adjacent segment or may be staggered by one corrugation which would mean one-half of a full wave cycle. The corrugation pattern in the turbulator panel may be created by any one of various stamping or forming operations and when placed between the cylinder liner and block, increases turbulence of the cooling liquid in order to enhance heat transfer.

  14. Towers for Offshore Wind Turbines

    NASA Astrophysics Data System (ADS)

    Kurian, V. J.; Narayanan, S. P.; Ganapathy, C.

    2010-06-01

    Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy. Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy from wind over the oceans and convert to electric energy. The advantages of offshore wind turbines as compared to land are that offshore winds flow at higher speed than onshore winds and the more available space. In some land based settings, for better efficiency, turbines are separated as much as 10 rotor diameters from each other. In offshore applications where only two wind directions are likely to predominate, the distances between the turbines arranged in a line can be shortened to as little as two or four rotor diameters. Today, more than a dozen offshore European wind facilities with turbine ratings of 450 kw to 3.6 MW exist offshore in very shallow waters of 5 to 12 m. Compared to onshore wind turbines, offshore wind turbines are bigger and the tower height in offshore are in the range of 60 to 80 m. The water depths in oceans where offshore turbines can be located are within 30 m. However as the distance from land increases, the costs of building and maintaining the turbines and transmitting the power back to shore also increase sharply. The objective of this paper is to review the parameters of design for the maximum efficiency of offshore wind turbines and to develop types offshore towers to support the wind turbines. The methodology of design of offshore towers to support the wind turbine would be given and the environmental loads for the design of the towers would be calculated for specific cases. The marine corrosion on the towers and the methods to control the corrosion also would be briefly presented. As the wind speeds tend to increase with distance from the shore, turbines build father offshore will be able to capture more wind energy. Currently two types of towers are considered. Cylindrical tubular structures and truss type structures. But truss type structures have less weight and flexibility in design. The construction of the offshore towers to harness the wind energy is also presented. The results will include the calculation of wind and wave forces on the tower and the design details for the tower.

  15. 46 CFR 117.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Personal flotation devices carried in addition to life jackets. 117.72 Section 117.72 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.72 Personal flotation devices...

  16. 46 CFR 180.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Personal flotation devices carried in addition to life jackets. 180.72 Section 180.72 Shipping...TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.72 Personal flotation devices...

  17. 46 CFR 117.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Personal flotation devices carried in addition to life jackets. 117.72 Section 117.72 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.72 Personal flotation devices...

  18. 46 CFR 117.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Personal flotation devices carried in addition to life jackets. 117.72 Section 117.72 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.72 Personal flotation devices...

  19. 46 CFR 180.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Personal flotation devices carried in addition to life jackets. 180.72 Section 180.72 Shipping...TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.72 Personal flotation devices...

  20. 46 CFR 117.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Personal flotation devices carried in addition to life jackets. 117.72 Section 117.72 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.72 Personal flotation devices...

  1. 46 CFR 117.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Personal flotation devices carried in addition to life jackets. 117.72 Section 117.72 Shipping...PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 117.72 Personal flotation devices...

  2. 46 CFR 180.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Personal flotation devices carried in addition to life jackets. 180.72 Section 180.72 Shipping...TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.72 Personal flotation devices...

  3. 46 CFR 180.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Personal flotation devices carried in addition to life jackets. 180.72 Section 180.72 Shipping...TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.72 Personal flotation devices...

  4. 46 CFR 180.72 - Personal flotation devices carried in addition to life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Personal flotation devices carried in addition to life jackets. 180.72 Section 180.72 Shipping...TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.72 Personal flotation devices...

  5. Calibration and validation of a spar-type floating offshore wind turbine model using the FAST dynamic simulation tool

    NASA Astrophysics Data System (ADS)

    Browning, J. R.; Jonkman, J.; Robertson, A.; Goupee, A. J.

    2014-12-01

    High-quality computer simulations are required when designing floating wind turbines because of the complex dynamic responses that are inherent with a high number of degrees of freedom and variable metocean conditions. In 2007, the FAST wind turbine simulation tool, developed and maintained by the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL), was expanded to include capabilities that are suitable for modeling floating offshore wind turbines. In an effort to validate FAST and other offshore wind energy modeling tools, DOE funded the DeepCwind project that tested three prototype floating wind turbines at 1/50th scale in a wave basin, including a semisubmersible, a tension-leg platform, and a spar buoy. This paper describes the use of the results of the spar wave basin tests to calibrate and validate the FAST offshore floating simulation tool, and presents some initial results of simulated dynamic responses of the spar to several combinations of wind and sea states. Wave basin tests with the spar attached to a scale model of the NREL 5-megawatt reference wind turbine were performed at the Maritime Research Institute Netherlands under the DeepCwind project. This project included free-decay tests, tests with steady or turbulent wind and still water (both periodic and irregular waves with no wind), and combined wind/wave tests. The resulting data from the 1/50th model was scaled using Froude scaling to full size and used to calibrate and validate a full-size simulated model in FAST. Results of the model calibration and validation include successes, subtleties, and limitations of both wave basin testing and FAST modeling capabilities.

  6. VIEW POURING PLATFORM SHOWING MOLD POURING JACKETS AND WEIGHTS AND, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW POURING PLATFORM SHOWING MOLD POURING JACKETS AND WEIGHTS AND, IN THE FOREGROUND, SAND RETURN FROM THE SHAKEOUT ACTUATING A SIMPLE LEVER SYSTEM THAT ADDED FRESH WATER TO THE SAND IN PREPARATION FOR ITS REUSE. - Southern Ductile Casting Company, Centerville Foundry, 101 Airport Road, Centreville, Bibb County, AL

  7. Red Jacket and the Decolonization of Republican Virtue

    ERIC Educational Resources Information Center

    Ganter, Granville

    2007-01-01

    History has not always been kind to Sagoyewatha, or, as he is more commonly known, Red Jacket. One of the most eloquent spokesmen for Native sovereignty in the early national period, Sagoyewatha was nonetheless accused by his peers of cowardice, alcoholism, and egotism. Fortunately, this picture is beginning to change. Christopher Densmore's…

  8. Welding vacuum jacketed piping at the Kennedy Space Center

    NASA Technical Reports Server (NTRS)

    Clautice, W. E.

    1975-01-01

    The present work describes fabrication, welding, and repair procedures and specifications for the vacuum jacketed piping used for conveying cryogenic fuels at space vehicle launch sites. The weld inspection procedures are described, and some examples of modifications of the piping are presented.

  9. Advanced Main Combustion Chamber structural jacket strength analysis

    NASA Technical Reports Server (NTRS)

    Johnston, L. M.; Perkins, L. A.; Denniston, C. L.; Price, J. M.

    1993-01-01

    The structural analysis of the Advanced Main Combustion Chamber (AMCC) is presented. The AMCC is an advanced fabrication concept of the Space Shuttle Main Engine main combustion chamber (MCC). Reduced cost and fabrication time of up to 75 percent were the goals of the AMCC with cast jacket with vacuum plasma sprayed or platelet liner. Since the cast material for the AMCC is much weaker than the wrought material for the MCC, the AMCC is heavier and strength margins much lower in some areas. Proven hand solutions were used to size the manifolds cutout tee areas for combined pressure and applied loads. Detailed finite element strength analyses were used to size the manifolds, longitudinal ribs, and jacket for combined pressure and applied local loads. The design of the gimbal actuator strut attachment lugs were determined by finite element analyses and hand solutions.

  10. Strengthening of reinforced concrete beams in flexure by partial jacketing

    Microsoft Academic Search

    Ibrahim Abd El Malik Shehata; Lidia da Conceição Domingues Shehata; Euler Wagner Freitas Santos; Maria Luisa de Faria Simões

    2009-01-01

    This work investigates the structural behaviour of reinforced concrete beams strengthened in bending by the addition of concrete\\u000a and steel on their tension sides using expansion bolts as shear connectors, technique here denominated partial jacketing.\\u000a The experimental program comprised tests on eight full-scale reinforced concrete beams, simply supported, with rectangular\\u000a cross section (150 mm × 400 mm) and 4,500 mm length. Five of these beams

  11. Domestic Options to Offshore Oil and Gas.

    ERIC Educational Resources Information Center

    Kash, Don E.

    1983-01-01

    The continuing controversey over offshore oil/gas has given impetus to searching for domestic energy alternatives. The need for and types of several alternative sources are discussed. Indicates that the United States needs to pursue both offshore and other domestic liquid-fuel sources if it is to avoid becoming increasingly dependent on imports.…

  12. Changing life jacket wearing behavior: an evaluation of two approaches.

    PubMed

    Mangione, Thomas; Chow, Wendy

    2014-05-01

    In the United States during 1999-2012, about 4 per cent of adults wore life jackets while engaged in recreation on powerboats. Educational campaigns have promoted life jacket use. Mandatory use regulations target primarily children or boaters on personal watercrafts or water skiing. We describe findings from two interventions - 'Wear It California!', a targeted marketing campaign in the California Delta region and mandatory wear regulations at four US Army Corps of Engineers (USACE) lakes in the state of Mississippi. Before the campaign in the Delta, adult wear was 8.5 per cent, increasing to 12.1 per cent during the first year, dipping to 9.4 per cent during the second year, and rising slightly to 10.5 per cent 3 plus years after the campaign. Before mandatory regulations at USACE lakes, adult wear was 13.7 per cent, increasing to 75.6 per cent during the first year, 70.1 per cent during the second year, and remaining high at 68.1 per cent in the third year. Policymakers should consider these findings when choosing how to increase life jacket use. PMID:24430805

  13. Modeling & dynamic studies of heat transfer cooling of liquid in half-coil jackets

    Microsoft Academic Search

    M. T. Dhotre; Z. V. P. Murthy; N. S Jayakumar

    2006-01-01

    The half-coil jacketed vessels find an extensive use in the chemical process industries for the process heating and cooling. The experimental studies of cooling of liquid using half-coil jacket is reported in the present work. The experiments are carried out for flow of coolant through half-coil jacket under both laminar and turbulent flow conditions. Correlations have been developed for the

  14. Low Life Jacket Use among Adult Recreational Boaters: A Qualitative Study of Risk Perception and Behavior Factors

    PubMed Central

    Quistberg, D. Alex; Bennett, Elizabeth; Quan, Linda; Ebel, Beth E.

    2013-01-01

    Background Life jackets may prevent one in two drowning deaths, however, 85% of recreational boating-related drowning victims in the United States in 2012 did not wear a life jacket. This study explored behavioral factors and strategies to encourage consistent life jacket use among adult recreational boaters. Methods We conducted a qualitative study among boat owners who boat regularly, and explored factors associated with life jacket use by adults and child or adolescent passengers. Sixteen boaters participated in four focus groups. Results Most boaters reported inconsistent use of life jackets, using them only when conditions were poor. Each described episodes of unpredictable boating risk which occurred despite favorable conditions. Most required younger child passengers to wear a life jacket, but reported resistance among older children. Barriers to consistent life jacket use included discomfort and the belief that life jacket use indicated inexperience or poor swimming ability. Participants stated that laws requiring life jacket use would change behavior especially for children. The only demonstrated behavior change among group members was associated with use of inflatable life jacket devices. Conclusions Boating risk is inherently unpredictable; therefore interventions should focus on strategies for increasing consistent use of life jackets. Passage and enforcement of life jacket legislation for older children and adults is likely a promising approach for behavior change. Designing more comfortable, better-fitting, more appealing life jackets will be paramount to encouraging consistent use. PMID:24211559

  15. Vacuum jacketed composite propulsion feedlines for cryogenic launch and space vehicles, volume 1. [development of glass fiber composite for strength and protection from handling damage

    NASA Technical Reports Server (NTRS)

    Spond, D. E.; Laintz, D. J.; Hall, C. A.; Dulaigh, D. E.

    1974-01-01

    Thin metallic liners that provide leak-free service in cryogenic propulsion systems are overwrapped with a glass-fiber composite that provides strength and protection from handling damage. The resultant tube is lightweight, strong, and has a low thermal flux. The inside commodity flow line and the outside vacuum jacket were fabricated using this method. Several types of vacuum jackets were fabricated and tested at operating temperatures from 294 to 21 K (+70 to minus 423 F) and operating pressure up to 69 N/cm2 (100 psi). The primary objective of the program was to develop vacuum jacket concepts, using previously developed concepts for the inner line. All major program objectives were met resulting in a design concept that is adaptable to a wide range of aerospace vehicle requirements. Major items of development included convolution of thin metallic sections up to 46 cm (18 in.) in diameter, design and fabrication of an extremely lightweight tension membrane concept for the vacuum jacket, and analytical tools that predict the failure mode and levels.

  16. Whole-body plethysmography in African green monkeys (Chlorocebus aethiops) with and without jackets.

    PubMed

    Foster, Chad D; Hunter, Ty C; Gibbs, Paul H; Leffel, Elizabeth K

    2008-09-01

    Indwelling central venous catheters are often used to facilitate frequent phlebotomy while minimizing stress and anesthetic effects on animals. However, nonhuman primates with central venous catheters must wear protective jackets. Jackets routinely are removed for aerosol exposure to agents and respiratory measurements by whole-body plethysmography (WBP) because of the potentially confounding effects of jackets on these procedures. However, removing the jacket may dislodge the catheter, making it unusable. Using each animal as its own control, we tested 12 African green monkeys to determine whether minute volume, tidal volume, respiratory rate, or accumulated volume measurements by WBP differed depending on whether the animal wore a protective jacket or not. We found no statistical differences in any measured respiratory parameter and concluded that the jackets could be left in place on the animal while undergoing plethysmography without compromising the calculations for determining the inhaled dose of aerosolized agent. In addition, this study revealed no obvious contraindications to leaving the jacket in place in other nonhuman primate species, provided that the jacket fits appropriately and that plethysmography is performed correctly. PMID:18947172

  17. Stiffness and Confinement Ratios of SMA Wire Jackets for Confining Concrete

    NASA Astrophysics Data System (ADS)

    Choi, Eunsoo; Kim, Dong Joo; Youn, Heejung

    2014-07-01

    This article discusses the effects of the stiffness and confinement ratios of shape memory alloy (SMA) wire jackets on the behavior of confined concrete. SMA wire jackets are an effective confining material to improve concrete behavior; for example, by increasing peak strength and failure strain. The stiffness and confinement ratios of fiber-reinforced polymer jackets have been extensively discussed and their effects are well known. However, assessment of the stiffness and confinement ratios of SMA wire jackets has not previously been conducted. In this study, we investigate the effects of the stiffness and confinement ratios of steel jackets, and then compare the results with those of SMA wire jackets. In general, the stiffness ratios of SMA wire jackets are relatively smaller than those of steel jackets, and most of them have lower stiffness ratios because the Young's moduli of the SMAs are relatively small. The active confining pressure of the SMA wires does not improve the lower stiffness-ratio effect since the amount of active confining pressure is not sufficiently large.

  18. THE MAN’S JACKET DESIGN FOR DISASSEMBLY: AN IMPLEMENTATION OF C2CAD FRAMEWORK

    EPA Science Inventory

    The C2CAD model served as the basis in the man’s jacket design and production. In man’s jackets, both natural and synthetic materials are commonly used for fabrics, threads, and buttons. To promote disassembly and value retention, we minimized material diversity an...

  19. Abrasion Resistance Of High-idensity Polyethylene Jackets Useid On Submarine Cables

    Microsoft Academic Search

    K. G. Booth; C. J. Sandwith

    1992-01-01

    polyethylene jackets used on submarine electro-optical cables abrade and wear. The mechanisms involved in this process are complex, and current theories of abrasion and wear of polymers are not reliable for predicting wear rates and jaclket lifetimes. The Applied Physics Laboratory at the University of Washington is con- ducting experiments to quantify wear rates on high-density polyethylene (HDPE) cable jackets.

  20. Tensile tests of ITER TF conductors jacket materials

    NASA Astrophysics Data System (ADS)

    Anashkin, O. P.; Kеilin, V. E.; Krivykh, A. V.; Diev, D. N.; Dinisilov, A. S.; Shcherbakov, V. I.; Tronza, V. I.

    2012-06-01

    The set of very tough requirements has been formulated for TF jacket materials with extremely high plasticity at liquid helium temperature. The stainless steel 316LN-IG is recommended to be used for TF jacket tubes. Samples of 316LN-IG tubes (whole tubes and sub-size samples) made of the material from the same electro slag remelt have been tested in different conditions - as received tubes and tubes after prescribed compaction, 2.5% deformation at room temperature and heat treatment at 650 0C, 200 hours. The tensile tests were carried out at room, liquid nitrogen and liquid helium temperatures down to 4.2 K, meeting corresponding ASME and ASTM requirements. The low temperature testing devices are described. The tests results for sub-size samples and whole tubes show that the latter tests are considerably more representative and important for butt weld qualification at LHe temperature. It was observed that the ferromagnetic properties of all samples and especially of butt welds increase with lowering the temperature and increasing the degree of deformation. At LHe temperature a non-uniform and highly localized serrated deformations were observed.

  1. Underwater noise from three types of offshore wind turbines: estimation of impact zones for harbor porpoises and harbor seals.

    PubMed

    Tougaard, Jakob; Henriksen, Oluf Damsgaard; Miller, Lee A

    2009-06-01

    Underwater noise was recorded from three different types of wind turbines in Denmark and Sweden (Middelgrunden, Vindeby, and Bockstigen-Valar) during normal operation. Wind turbine noise was only measurable above ambient noise at frequencies below 500 Hz. Total sound pressure level was in the range 109-127 dB re 1 microPa rms, measured at distances between 14 and 20 m from the foundations. The 1/3-octave noise levels were compared with audiograms of harbor seals and harbor porpoises. Maximum 1/3-octave levels were in the range 106-126 dB re 1 microPa rms. Maximum range of audibility was estimated under two extreme assumptions on transmission loss (3 and 9 dB per doubling of distance, respectively). Audibility was low for harbor porpoises extending 20-70 m from the foundation, whereas audibility for harbor seals ranged from less than 100 m to several kilometers. Behavioral reactions of porpoises to the noise appear unlikely except if they are very close to the foundations. However, behavioral reactions from seals cannot be excluded up to distances of a few hundred meters. It is unlikely that the noise reaches dangerous levels at any distance from the turbines and the noise is considered incapable of masking acoustic communication by seals and porpoises. PMID:19507958

  2. New Structural-Dynamics Module for Offshore Multimember Substructures within the Wind Turbine Computer-Aided Engineering Tool FAST: Preprint

    SciTech Connect

    Song, H.; Damiani, R.; Robertson, A.; Jonkman, J.

    2013-08-01

    FAST, developed by the National Renewable Energy Laboratory (NREL), is a computer-aided engineering (CAE) tool for aero-hydro-servo-elastic analysis of land-based and offshore wind turbines. This paper discusses recent upgrades made to FAST to enable loads simulations of offshore wind turbines with fixed-bottom, multimember support structures (e.g., jackets and tripods, which are commonly used in transitional-depth waters). The main theory and strategies for the implementation of the multimember substructure dynamics module (SubDyn) within the new FAST modularization framework are introduced. SubDyn relies on two main engineering schematizations: 1) a linear frame finite-element beam (LFEB) model and 2) a dynamics system reduction via Craig-Bampton's method. A jacket support structure and an offshore system consisting of a turbine atop a jacket substructure were simulated to test the SubDyn module and to preliminarily assess results against results from a commercial finite-element code.

  3. Infrared detector Dewars - Increased LN2 hold time and vacuum jacket life spans

    NASA Technical Reports Server (NTRS)

    Jennings, D. E.; Boyd, W. J.; Blass, W. E.

    1976-01-01

    IR detector Dewars commonly suffer from shorter than desired LN2 hold times and insulation jacket vacuum corruption over relatively short time periods. In an attempt to solve this problem for a 9144 detector Dewar, small 1 liter/s appendage ion pumps were selected for continuous pumping of the vacuum jackets. This procedure extended LN2 hold times from 20 to 60 h and virtually eliminated vacuum jacket corruption. Thus the detector systems are usable continuously over periods of 6 months or more.

  4. Lightweight Vacuum Jacket for Cryogenic Insulation - Appendices to Final Report. Volume 2

    NASA Technical Reports Server (NTRS)

    Barclay, D. L.; Bell, J. E.; Brogren, E. W.; Straayer, J. W.

    1975-01-01

    The feasibility is demonstrated of producing a lightweight vacuum jacket using state-of-the-art technology and materials. Design and analytical studies were made on an orbital maneuvering system fuel tank. Preliminary design details were completed for the tank assembly which included an optimized vacuum jacket and multilayered insulation system. A half-scale LH2 test model was designed and fabricated and a force/stiffness proof test was conducted on the vacuum jacket. A vacuum leak rate of 0.00001 was measured, approximately 1500 hours of vacuum pressure was sustained, and 29 vacuum pressure cycles were experienced prior to failure. For vol. 1, see N75-26192.

  5. Hydrocarbon traps along Louisiana offshore

    SciTech Connect

    Lowrie, A.; Sullivan, N.

    1989-03-01

    A compilation of potential hydrocarbon trap types has been assembled for the Louisiana offshore, from coastal plain to abyssal plain. These potential traps are listed according to paleophysiographic provinces: coastal plain, shelf, shelf break, upper slope, middle slope, lower slope, and abyssal plain. Characteristics of each trap type are tabulated. The characteristics include tectonics, regional and local sedimentation rates and types, position within an evolving sequence as determined by sequence stratigraphy, duration of reservoir and/or trap creation, and sea level position. Regional geologic processes, such as salt tectonics, and approximate rates at which they operate are also listed.

  6. The effect on engine performance of change in jacket-water outlet temperature

    NASA Technical Reports Server (NTRS)

    Garlock, E A; Ellis, Greer

    1933-01-01

    Tests made on a Curtiss D-12 engine in the Altitude Laboratory at the Bureau of Standards show the following effects on engine performance of change in jacket-water outlet temperature: 1) Friction at all altitudes is a linear function of the jacket-water temperature, decreasing with increasing temperature. 2) The brake horsepower below an altitude of about 9,000 feet decreases, and at higher altitudes increases, with jacket-water temperature. 3) The brake specific fuel consumption tends to decrease, at all altitudes, with increasing jacket-water temperature. 4) The percentage change in brake power output is roughly equal to the algebraic sum of the percentage change in volumetric efficiency and mechanical efficiency.

  7. Yellow jackets may be an underestimated component of an ant-seed mutualism

    USGS Publications Warehouse

    Bale, M.T.; Zettler, J.A.; Robinson, B.A.; Spira, T.P.; Allen, C.R.

    2003-01-01

    Yellow jackets (Hymenoptera: Vespidae) are attracted to the typically ant-dispersed seeds of trilliums and will take seeds from ants in the genus Aphaenogaster. To determine if yellow jacket, Vespula maculifrons (Buysson), presence interferes with seed foraging by ants, we presented seeds of Trillium discolor Wray to three species (A. texana carolinensis Wheeler, Formica schaufussi Mayr, and Solenopsis invicta Buren) of seed-carrying ants in areas where vespids were present or excluded. We found that interspecific aggression between yellow jackets and ants is species specific. Vespid presence decreased average foraging time and increased foraging efficiency of two of the three ant species studied, a situation that might reflect competition for a limited food source. We also found that yellow jackets removed more seeds than ants, suggestive that vespids are important, albeit underestimated, components of ant-seed mutualisms.

  8. Offshore oil: an overview

    SciTech Connect

    Manners, I.R.

    1980-06-01

    This report provides an assessment of the current status of offshore activity with particular reference to (1) trends in offshore production, and (2) the intensity and location of exploration drilling, this being an essential precondition for any future increase in offshore crude production. The report includes in-depth profiles of those non-OPEC nationa where the chances of discovering further recoverable offshore reserves appear highest. The underlying concern is to identify those nations that are on the offshore frontier. It is these nations that must resolve in an appropriate and timely manner the particular policy issues that arise in the course of offshore oil exploration and production. These issues include (1) the development of appropriate, risk-free offshore technologies, and (2) balancing of conflicting and competing demands for land (recreational use, wetland preservation, siting of infrastructure and energy-related facilities) in the coastal zone. In these respects, the exploitation of offshore oil and gas poses a unique form of challenge.

  9. High-temperature stability of optical transmission properties attained by liquid-crystal polymer jacket

    Microsoft Academic Search

    Yoshito Shuto; Fumio Yamamoto; Yoshiaki Takeuchi

    1986-01-01

    Liquid crystal polyester (LCP) tight jackets, developed as secondary coatings on optical fibers, exhibit Young's moduli of 10-20 GPa and linear expansion coefficients on the order of 10-6\\/°C. Because of their low linear expansion coefficients, and because they exhibit no thermal shrinkage, the LCP jackets cause a slight change in fiber strain on the order of 10-4percent\\/°C, or a change

  10. Evaluation of the Use of Primate Undershirts as a Refinement Practice for Jacketed Rhesus Macaques (Macaca mulatta)

    PubMed Central

    Carlson, Amy; Kern, Steven J; Field, Amy; Marko, Shannon; Bailey, Emily; Norris, Sarah; Honko, Anna; Rico, Pedro

    2014-01-01

    Jacketing of nonhuman primates (NHP) is a commonly used practice in the laboratory animal setting to support data collection with reduced direct human-to-animal interaction. NHP often wear jackets for several weeks, potentially leading to the formation of dermal lesions ranging from mild alopecia to severe full-thickness ulceration. We sought to evaluate the addition of a commercially available undershirt for primates as a possible refinement practice for our jacketed rhesus macaques. In this study, we compared the lesion count, location, and severity and differences in rectal body temperature between jacketed NHP with undershirts with those wearing the jackets alone. In both groups, most lesions (75%) were located at either the underarm or shoulder. The percentages of total lesions in the back and neck were lower in jacketed NHP that wore undershirts than in those that did not. In addition, the estimated odds of increased severity scores in jacketed NHP without undershirts was 1.80 times that for NHP that wore both jackets and undershirts. Both groups of NHP showed a significant decrease in dermal scores with time, indicating adaptation to the jackets with or without undershirts. However, there was no statistically significant decrease in lesion count, severity, or location in jacketed NHP that wore undershirts compared with those that did not. PMID:24827568

  11. Session: Offshore wind

    SciTech Connect

    Gaarde, Jette; Ram, Bonnie

    2004-09-01

    This session at the Wind Energy and Birds/Bats workshop consisted of two presentations. Due to time constraints, a discussion period was not possible. The session addressed the current state of offshore wind energy development. The first presentation ''Monitoring Program and Results: Horns Rev and Nysted'' by Jette Gaarde summarized selected environmental studies conducted to date at operating offshore wind turbine projects in Denmark and lessons from other offshore wind developments in Europe. Wildlife impacts studies from the Danish sites focused on birds, fish, and mammals. The second presentation ''What has the U.S. Wind Industry Learned from the European Example'' by Bonnie Ram provided an update on current permit applications for offshore wind developments in the U.S. as well as lessons that may be drawn from the European experience.

  12. Seismic retroftting of RC columns with RC jackets and wing walls with different structural details

    NASA Astrophysics Data System (ADS)

    Chang, Shuenn-Yih; Chen, Ting-Wei; Tran, Ngoc-Cuong; Liao, Wen-I.

    2014-06-01

    An original reinforced concrete (RC) column and four strengthened specimens, two with RC jackets and two with wing walls, were tested in this study. The original column specimen was designed to comply with older (pre-1999) design standards so that the usual detailing deficiencies in existing school buildings in Taiwan could be simulated. Two different structural details were chosen to fabricate the full-scale specimens for each retrofitting technique. The study confirmed that either RC jacketing or the installation of wing walls with two different structural details can effectively improve the stiffness and strength of an existing column. RC jacketing shows a better improvement in energy dissipation and ductility when compared to the columns with wing walls installed. This is because the two RC jacketed columns experienced a flexural failure, while a shear failure was found in the two columns with the wing walls installed, and thus led to a drastic decrease of the maximum lateral strengths and ductility. Since many factors may affect the installation of a post-installed anchor, it is better to use standard hooks to replace post-installed anchors in some specific points when using RC jacketing or installing wing walls.

  13. Management of offshore wastes in the United States.

    SciTech Connect

    Veil, J. A.

    1998-10-22

    During the process of finding and producing oil and gas in the offshore environment operators generate a variety of liquid and solid wastes. Some of these wastes are directly related to exploration and production activities (e.g., drilling wastes, produced water, treatment workover, and completion fluids) while other types of wastes are associated with human occupation of the offshore platforms (e.g., sanitary and domestic wastes, trash). Still other types of wastes can be considered generic industrial wastes (e.g., scrap metal and wood, wastes paints and chemicals, sand blasting residues). Finally, the offshore platforms themselves can be considered waste materials when their useful life span has been reached. Generally, offshore wastes are managed in one of three ways--onsite discharge, injection, or transportation to shore. This paper describes the regulatory requirements imposed by the government and the approaches used by offshore operators to manage and dispose of wastes in the US.

  14. EVALUATION OF THE FAILURE OF A RADIOACTIVE WASTE TRANSFER LINE JACKET

    SciTech Connect

    Wiersma, B; Alan03 Plummer, A; Karthik Subramanian, K; Charles Jenkins, C; William Hinz, W; A Fellinger, A

    2007-04-06

    Radioactive wastes are confined in 49 underground storage tanks at the Savannah River Site. The waste is transported between tanks primarily via an underground transfer piping system. Due to the hazardous nature of the waste, the inner core stainless steel pipe is typically surrounded by a carbon steel pipe jacket, which provides secondary containment. Recently several through-wall penetrations were discovered on a segment of one of the jackets. An evaluation was performed to verify the failure mechanism and to estimate the degree of damage that occurred to the pipe segment. Failure analysis of a section of the jacket confirmed that pitting corrosion on the exterior of the pipe led to the through-wall penetration. Ultrasonic measurements on sections of the pipe were utilized to determine the remaining wall thickness in adjacent areas of the pipe. Based on these measurements, the degree of pitting and general corrosion was determined. Pit growth rate models were then developed to estimate the life expectancy of sections of the pipe that had not been excavated. The calculations estimated that the occurrence of through-wall failures in this jacket will begin to increase substantially in 12 years. Given that this pipe segment will be utilized beyond this time, short-term and long-term solutions to this failure were proposed. The short-term solutions focused on the repair or replace decisions that must be made to return the jacket to service as soon as practical. The long-term solutions focused on a broader strategy to address jacket integrity issues in the entire tank farm facility. These solutions included the evaluation of innovative remote inspection and repair techniques.

  15. Solar power satellite offshore rectenna study

    NASA Technical Reports Server (NTRS)

    1980-01-01

    Offshore rectennas are feasible and cost competitive with land rectennas but the type of rectenna suitable for offshore use is quite different from that specified in the present reference system. A nonground plane design minimizes the weight and greatly reduces the number of costly support towers. This perferred design is an antenna array consisting of individually encapsulated dipoles with reflectors or tagis supported on feed wires. Such a 5 GW rectenna could be built at a 50 m water depth site to withstand hurricane, winter storm, and icing conditions for a one time cost of $5.7 billion. Subsequent units would be about 1.3 less expensive. More benign and more shallow water sites would result in substantially lower costs. The major advantage of an offshore rectenna is the removal of microwave radiation from populated areas.

  16. Energy from Offshore Wind: Preprint

    SciTech Connect

    Musial, W.; Butterfield, S.; Ram, B.

    2006-02-01

    This paper provides an overview of the nascent offshore wind energy industry including a status of the commercial offshore industry and the technologies that will be needed for full market development.

  17. NREL Software Aids Offshore Wind Turbine Designs (Fact Sheet)

    SciTech Connect

    Not Available

    2013-10-01

    NREL researchers are supporting offshore wind power development with computer models that allow detailed analyses of both fixed and floating offshore wind turbines. While existing computer-aided engineering (CAE) models can simulate the conditions and stresses that a land-based wind turbine experiences over its lifetime, offshore turbines require the additional considerations of variations in water depth, soil type, and wind and wave severity, which also necessitate the use of a variety of support-structure types. NREL's core wind CAE tool, FAST, models the additional effects of incident waves, sea currents, and the foundation dynamics of the support structures.

  18. Offshore wind farm layout optimization

    Microsoft Academic Search

    Christopher Neil Elkinton

    2007-01-01

    Offshore wind energy technology is maturing in Europe and is poised to make a significant contribution to the U.S. energy production portfolio. Building on the knowledge the wind industry has gained to date, this dissertation investigates the influences of different site conditions on offshore wind farm micrositing---the layout of individual turbines within the boundaries of a wind farm. For offshore

  19. Immigration, Offshoring and American Jobs

    Microsoft Academic Search

    Gianmarco I. P. Ottaviano; Giovanni Peri; Greg C. Wright

    2012-01-01

    How do offshoring and immigration affect the employment of native workers? What kinds of jobs suffer, or benefit, most from the competition created by offshore and immigrant workers? In contrast to the existing literature that has mostly looked at the effects of offshoring and immigration separately, we argue that one can gain useful insights by jointly investigating the interactions among

  20. Offshore Renewable Energy Solutions

    E-print Network

    , and advances in wave forecasting will support the next generation of deep-water floating devices. Enablers We helping you to deliver offshore #12;Eco-innovation Our input into new designs for floating and deep structures. We can advise on the use of novel foundat

  1. Combination offshore drilling rig

    Microsoft Academic Search

    D. B. Lorenz; J. S. II Laid

    1986-01-01

    An offshore drilling rig is described for use in drilling into a formation below a body of water comprising a barge hull having a drilling slot extending inwardly from the peripheral boundary of the barge hull, means for supporting the barge hull in a position above the water, a cantilever structure mounted on the barge hull and movable horizontally with

  2. Reinforced concrete offshore platform

    Microsoft Academic Search

    J. P. Martyshenko; S. J. Martyshenko; J. S. Kotelnikov; E. G. Kutukhtin; M. S. Petrosian; N. I. Ilyasova; J. S. Volkov; A. M. Vardanian

    1987-01-01

    A reinforced concrete offshore platform is described comprising a honeycomb foundation (A), a supporting structure (B) and an above-surface section (C) carrying appropriate equipment. The honeycomb foundation (A) and the supporting structure (B) are made of prefabricated reinforced concrete elements which are polyhedral hollow prisms arranged with gaps between the external sides thereof and joined by a system of prestressed

  3. Offshore pollution prevention

    Microsoft Academic Search

    Favret; U. B. Jr

    1984-01-01

    A complete system for removing oil from produced water and deck drain fluids in an offshore facility includes a surge settler which receives the produced water from a three-phase separator. In the surge settler, the produced water flows crosswise through a corrugated plate assembly to separate free oil and solids from the produced water. A portion of the produced water

  4. A Model for Assessing Ignition, Flame Spread, and Burn Hazard Potential of a Multilayered Jacket

    E-print Network

    Texas at Austin, University of

    A Model for Assessing Ignition, Flame Spread, and Burn Hazard Potential of a Multilayered Jacket Ofodike A. Ezekoye, PhD,* Kenneth R. Diller, ScD An analysis is presented of ignition, flame spread processes can all be de- tailed based on simple thermophysical modeling. The ignition process associated

  5. Experiment study on FLOATING JACKET: a new concept for deep water platform design

    E-print Network

    Xu, Yufeng

    1996-01-01

    in this thesis. The most unique feature of the new FJ concept is to place much of the needed buoyancy/ballast deep in the ocean water. The deck and production equipment are supported by a jacket structure which is in turn mounted on top of the large buoyancy...

  6. Olfactory Learning of Fruit Odors in the Eastern Yellow Jacket, Vespula maculifrons (Hymenoptera: Vespidae)

    Microsoft Academic Search

    Rudolf Jander

    1998-01-01

    Food-seaching workers of eastern yellow jackets, Vespula maculifrons, are attracted by the natural odors of a wide variety of succulent fruits; particularly effective was pear. The only part of a fruit that repelled was the leathery epicarp of oranges. After rewarding with sugar water, odors of six fruits, including the pulpy mesocarp of oranges and, in addition, the leaves of

  7. Offshore Wind Research (Fact Sheet)

    SciTech Connect

    Not Available

    2011-10-01

    This 2-page fact sheet describes NREL's offshore wind research and development efforts and capabilities. The National Renewable Energy Laboratory is internationally recognized for offshore wind energy research and development (R&D). Its experience and capabilities cover a wide spectrum of wind energy disciplines. NREL's offshore wind R&D efforts focus on critical areas that address the long-term needs of the offshore wind energy industry and the Department of Energy (DOE). R&D efforts include: (1) Developing offshore design tools and methods; (2) Collaborating with international partners; (3) Testing offshore systems and developing standards; (4) Conducting economic analyses; (5) Characterizing offshore wind resources; and (6) Identifying and mitigating offshore wind grid integration challenges and barriers. NREL has developed and maintains a robust, open-source, modular computer-aided engineering (CAE) tool, known as FAST. FAST's state-of-the-art capabilities provide full dynamic system simulation for a range of offshore wind systems. It models the coupled aerodynamic, hydrodynamic, control system, and structural response of offshore wind systems to support the development of innovative wind technologies that are reliable and cost effective. FAST also provides dynamic models of wind turbines on offshore fixed-bottom systems for shallow and transitional depths and floating-platform systems in deep water, thus enabling design innovation and risk reduction and facilitating higher performance designs that will meet DOE's cost of energy, reliability, and deployment objectives.

  8. Frequency variation and sensor contribution assessment: Application to an offshore platform in the South China Sea

    NASA Astrophysics Data System (ADS)

    Liu, Fushun; Li, Huajun; Wang, Weiying; Li, Wei; Wang, Bin

    2015-02-01

    In this paper, a time-frequency and multiple-sensor assessment method is presented and then applied to an offshore platform in the South China Sea with the goal of providing a more suitable time duration of measured signals and evaluating each sensor's contribution to mode shapes of interest. By processing all measured signals simultaneously, a series of linear parameters are used to fit the measured signals. A moving window in overlapping steps along the time record of a non-stationary signal is used for time-frequency analysis while a series of amplitude matrices are obtained for all sliced segments. These segments are then used to evaluate each sensor's contribution to some mode(s) of interest. Compared with the short-time Fourier transform (STFT) or S-transform method, the frequencies used in this time-frequency analysis are shared by the sensors involved so that the variations in the results due to the characteristics of different sensors are avoided. In addition, the approach requires only a short-duration segment to obtain high-frequency resolution, which will improve the computing efficiency of modal analysis using measured seat est data. The proposed method could also be used to estimate damping ratios and each sensor's contribution to modes of interest based on the analysis of the series of amplitude matrices; this could be used to guide the installation of sensors in field tests of offshore structures. To demonstrate the proposed method with a time-frequency analysis, a numerical example of a synthesized signal with five segments, each with its owns different frequency componentsincluding a relatively weaker component, is constructed; numerical results from the analysis of this example signal indicate that the approach could yield a sharper image with a good computing efficiency. The second example simulates three signals that represent multiple measurements; this example is used to study each sensor's contribution to different modes based on an amplitude matrix. Finally, measurements from a four-leg jacket-type offshore platform located in the Beibu Gulf in China are used to study the proposed method. It can be concluded that sea-test measurements of offshore platforms show frequency-varying characteristics, and the proposed method could provide a more suitable time duration of signals for modal analysis. The assembled 24 sensors are shown to have different contributions to frequencies at 1.0375 Hz, and the amplitude of each sensor will not be a constant when different segments of a measurement are used for analysis. However, each sensor's contribution to the assigned modes can be assessed based on average values. For example, the contribution of sensor 3 is estimated to be 12.5362 per cent, sensor 15's contribution is estimated to be 7.1803 per cent. Each sensor's importance to the mode of interest could then be evaluated.

  9. Solar power satellite offshore rectenna study

    NASA Technical Reports Server (NTRS)

    1980-01-01

    It was found that an offshore rectenna is feasible and cost competitive with land rectennas but that the type of rectenna which is suitable for offshore use is quite different from that specified in the present reference system. The result is a nonground plane design which minimizes the weight and greatly reduces the number of costly support towers. This preferred design is an antenna array consisting of individually encapsulated dipoles with reflectors supported on feed wires. Such a 5 GW rectenna could be built at a 50 m water depth site to withstand hurricane and icing conditions for a one time cost of 5.7 billion dollars. Subsequent units would be about 1/3 less expensive. The east coast site chosen for this study represents an extreme case of severe environmental conditions. More benign and more shallow water sites would result in lower costs. Secondary uses such as mariculture appear practical with only minor impact on the rectenna design. The potential advantages of an offshore rectenna, such as no land requirements, removal of microwave radiation from populated areas and minimal impact on the local geopolitics argue strongly that further investigation of the offshore rectenna should be vigorously pursued.

  10. America's Offshore Refugee Camps

    Microsoft Academic Search

    Harold Hongju Koh

    1994-01-01

    America's offshore refugee camps rank. among the most startling, yet invisible, features of United States foreign policy in the post-Cold War era. Since 1991, our Government has almost continuously maintained tent cities holding thousands of men, women, and children, surrounded by rolls of razor-barbed wire, amid the sweltering heat of the U.S. Naval Base at Guantanamo Bay, Cuba, and the

  11. Synthesis and characterization of four-armed star mesogen-jacketed liquid crystal polymer

    Microsoft Academic Search

    Xingzhu Wang; Hailiang Zhang; Guanqun Zhong; Xiayu Wang

    2004-01-01

    The synthesis of four-armed star mesogen-jacketed liquid crystal polymer was achieved by atom transfer radical polymerization in chlorobenzene solution using pentaerythritol terakis(2-bromoisobutyrate) (PT-Br) as an initiator and CuBr\\/sparteine complex as a catalyst. The results show that the number average molecular weigh is creased linearly vs. monomer conversion, and that the polydispersities were quite narrow (<1.19), which is the character of

  12. Variation of pulse delay with stress and temperature in jacketed and unjacketed optical fibres

    Microsoft Academic Search

    A. H. Hartog; A. J. Conduit; D. N. Payne

    1979-01-01

    The stability of optical-fibre delay lines is assessed by means of measurements of pulse transit times in unjacketed silica-based fibres. Data obtained for the effect of longitudinal stress and temperature are used to interpret the time delays found in jacketed fibres. It is shown that the application of close-fitting plastic cabling materials results in a residual fibre stress which is

  13. Venom immunotherapy improves health-related quality of life in patients allergic to yellow jacket venom

    Microsoft Academic Search

    Joanne N. G. Oude Elberink; Jan G. R. de Monchy; Sicco van der Heide; Gordon H. Guyatt; Anthony E. J. Dubois

    2002-01-01

    Background: Venom immunotherapy (VIT) is effective in preventing anaphylactic reactions after insect stings. The effect of VIT on health-related quality of life (HRQL) was studied to evaluate whether this treatment is of importance to patients. Objective: We compared HRQL outcomes measured with a disease-specific instrument (Vespid Allergy Quality-of-Life Questionnaire [VQLQ]) in patients allergic to yellow jacket venom treated with VIT

  14. Nitrogen CARS Thermometry Within the Outer Jacket of a Metal Halide Lamp

    NASA Astrophysics Data System (ADS)

    Brock, Lori R.; Adler, Helmar

    1999-10-01

    High-resolution coherent anti-Stokes Raman spectroscopy (CARS) was applied to measure axial and radial temperature profiles within the outer jacket of a 360 Watt metal halide lamp. The CARS technique was chosen for this task because its good spatial resolution, coherent signal beam, nonintrusive nature, and selectivity yields spectra with very high signal to noise ratios despite the high level of background radiation from the running lamp. We use nitrogen CARS thermometry here because the outer jacket is filled with 400 torr of nitrogen at room temperature. Rotationally resolved nitrogen CARS spectra are measured at a number of points within the metal halide lamp. A spectral simulation program is utilized to calculate spectra for gas temperatures between 500 and 1000 K. A comparison between these simulations and the measured rotationally resolved nitrogen CARS spectra allows the temperature at each point in the lamp to be accurately determined. In addition, good agreement was achieved between the measured temperature distribution and predicted axial and radial temperature profiles in the outer jacket of the metal halide lamp.

  15. Efficiency of the Thermal Jacket on the delivered temperature of prewarmed crystalloid intravenous fluid.

    PubMed

    Bowen, D R

    1992-08-01

    Warming of intravenous fluids can decrease the incidence of hypothermia in surgical patients. A quasi-experimental research design was used to compare the delivered temperature of fluids using a conventional blood warmer and the Thermal Jacket, an insulation device designed for intravenous fluid bags. Fluids were divided into one control and three experimental groups. Fluids were initially either room temperature (22.05 +/- 0.45 degrees C) or prewarmed to 41.45 +/- 1.05 degrees C and infused using no temperature maintenance device, a Thermal Jacket, or a water bath blood warmer. Temperatures were recorded at 10-minute intervals at flow rates ranging from 100 to 1,000 mL/hr. Analysis of variance showed a highly significant difference between the delivered temperatures using the various temperature maintenance devices, as well as varying flow rates. The Thermal Jacket, used with prewarmed intravenous fluids, was as effective as the conventional method of delivering warmed fluids. Also, within the range of flow rates studied, faster flow rates tended to yield higher delivered temperatures. PMID:1523951

  16. Reinforced concrete offshore platform

    SciTech Connect

    Martyshenko, J.P.; Martyshenko, S.J.; Kotelnikov, J.S.; Kutukhtin, E.G.; Petrosian, M.S.; Ilyasova, N.I.; Volkov, J.S.; Vardanian, A.M.

    1987-10-20

    A reinforced concrete offshore platform is described comprising a honeycomb foundation (A), a supporting structure (B) and an above-surface section (C) carrying appropriate equipment. The honeycomb foundation (A) and the supporting structure (B) are made of prefabricated reinforced concrete elements which are polyhedral hollow prisms arranged with gaps between the external sides thereof and joined by a system of prestressed vertical diaphragm walls and horizontal diaphragm walls formed by pre-tensioning reinforcing bars placed in the gaps between the faces of the prisms and casting in-situ the gaps later on.

  17. Offshore sand for reinforced concrete

    Microsoft Academic Search

    W. P. S. Dias; G. A. P. S. N. Seneviratne; S. M. A. Nanayakkara

    2008-01-01

    A figure of 0.075% by weight of sand was arrived at as a safe limit for allowable Cl? ion content in offshore sand for OPC based reinforced concrete. A 2m high sand column was fabricated for checking the effects of natural drainage and simulated rain on the chloride levels in offshore sand, and the action of even 80mm of rain

  18. Offshore Drilling From Ice Platforms

    Microsoft Academic Search

    G. L. Hood; H. J. Strain; D. J. Baudais

    1976-01-01

    This paper describes a method successfully developed for drilling offshore from a floating ice platform. This method has allowed exploration wells to be drilled economically in the Canadian Arctic islands without years of waiting for sophisticated offshore drilling vessels to be developed, financed, and built to operate in the severe ice conditions prevalent in the area.

  19. Ice protection of offshore platforms

    Microsoft Academic Search

    Charles C. Ryerson

    2011-01-01

    Climate change-induced reduction in the extent and duration of sea ice cover, as well as an increase in energy demands, has caused renewed interest in exploring and drilling for oil in Arctic waters. Superstructure icing from sea spray and atmospheric icing in the Arctic may impact offshore platform operations. Though icing has not caused the loss of an offshore platform,

  20. A drilling model for young offshore Louisiana and Texas trends

    SciTech Connect

    Smalling, D.A.; Meyers, R.L. II

    1988-06-01

    A new type of model specifically designed to aid in the planning and drilling of young offshore Louisiana and Texas wells is presented. The model is composed of functions to represent changing drilling mechanics, as well as changing drillabilities with respect to depth, area, and formation type.

  1. Base deformation of full metal-jacketed rifle bullets as a measure of impact velocity and range of fire.

    PubMed

    Haag, Lucien C

    2015-03-01

    Full metal-jacketed rifle bullets with lead cores and open bases can experience deformation of their cylindrical shapes as they yaw during the penetration of soft tissues. The amount of deformation depends upon the strength of the bullet and the velocity in soft tissue when they go into yaw. The yaw behavior of a bullet in soft tissue depends upon its design (length, ogive shape, ogive length, center of gravity, and pre-impact stability) as it penetrates soft tissue. The yaw characteristics of common spitzer-type military rifle bullets are relatively well known and quite reproducible when fired into suitable soft tissue simulants. This, in turn, results in a relationship between the amount of deformation of the bullet's shank and impact velocity with soft tissue. The specific relationship between impact velocity and bullet deformation must be worked out through empirical testing, but this relationship can be of critical importance in determining impact velocity, which, in turn, relates to range of fire. PMID:25594572

  2. Conceptual Model of Offshore Wind Environmental Risk Evaluation System

    SciTech Connect

    Anderson, Richard M.; Copping, Andrea E.; Van Cleve, Frances B.; Unwin, Stephen D.; Hamilton, Erin L.

    2010-06-01

    In this report we describe the development of the Environmental Risk Evaluation System (ERES), a risk-informed analytical process for estimating the environmental risks associated with the construction and operation of offshore wind energy generation projects. The development of ERES for offshore wind is closely allied to a concurrent process undertaken to examine environmental effects of marine and hydrokinetic (MHK) energy generation, although specific risk-relevant attributes will differ between the MHK and offshore wind domains. During FY10, a conceptual design of ERES for offshore wind will be developed. The offshore wind ERES mockup described in this report will provide a preview of the functionality of a fully developed risk evaluation system that will use risk assessment techniques to determine priority stressors on aquatic organisms and environments from specific technology aspects, identify key uncertainties underlying high-risk issues, compile a wide-range of data types in an innovative and flexible data organizing scheme, and inform planning and decision processes with a transparent and technically robust decision-support tool. A fully functional version of ERES for offshore wind will be developed in a subsequent phase of the project.

  3. Airborne sound propagation over sea during offshore wind farm piling.

    PubMed

    Van Renterghem, T; Botteldooren, D; Dekoninck, L

    2014-02-01

    Offshore piling for wind farm construction has attracted a lot of attention in recent years due to the extremely high noise emission levels associated with such operations. While underwater noise levels were shown to be harmful for the marine biology, the propagation of airborne piling noise over sea has not been studied in detail before. In this study, detailed numerical calculations have been performed with the Green's Function Parabolic Equation (GFPE) method to estimate noise levels up to a distance of 10?km. Measured noise emission levels during piling of pinpiles for a jacket-foundation wind turbine were assessed and used together with combinations of the sea surface state and idealized vertical sound speed profiles (downwind sound propagation). Effective impedances were found and used to represent non-flat sea surfaces at low-wind sea states 2, 3, and 4. Calculations show that scattering by a rough sea surface, which decreases sound pressure levels, exceeds refractive effects, which increase sound pressure levels under downwind conditions. This suggests that the presence of wind, even when blowing downwind to potential receivers, is beneficial to increase the attenuation of piling sound over the sea. A fully flat sea surface therefore represents a worst-case scenario. PMID:25234870

  4. Mobile offshore drilling units for frontier areas

    SciTech Connect

    Kelly, P.L.

    1983-04-01

    As response to the expanded Five-Year Offshore Leasing Plan a tremendous amount of construction and expansion has been underway in the offshore industry. This presentation is intended to provide a sampling of the mobile offshore drilling units which are expected to be used in frontier areas offshore Alaska.

  5. Effects of wave-current and fluid-structure interactions on fatigue damages of offshore structures

    SciTech Connect

    Karadeniz, H. [Delft Univ. of Technology (Netherlands)

    1995-12-31

    This paper investigates effects of wave-current and fluid-structure interactions on fatigue damages of offshore structures. Some basic formulations of the spectral analysis under a uniform current condition is presented prior to the calculation of the fatigue damages. In these formulations, a linearized Morison`s equation is used with a linearization constant which contains effects of wave-current and fluid-structure coupling. In the calculation of fatigue damages, a multi-linear S-N fatigue model is used with a non-narrow banded stress process. The probability distribution of stress ranges in a sea state is given in terms of some parameters which are determined on the basis of a rainflow cycle counting. The damage is then calculated probabilistically from contributions of the segments of the S-N model. Finally, a demonstration is presented by an example jacket structure.

  6. Bahrain's offshore banking center

    SciTech Connect

    Gerakis, A.S.; Roncesvalles, O.

    1983-01-01

    The economic effects of Bahrain's schemes for licensing offshore banking units (OBUs) were the immediate response of major international banks and the financial services the banking center has rendered by improving regional money and exchange markets at a time when a Middle East link was needed to service the increasing demand for oil-wealth banking services. Bahrain's leadership also created a favorable climate. Aggressive competition from banks in Kuwait and Saudi Arabia have caused some friction, but informal supervision by the Bahrain Monetary Agency (BMA) should be able to avoid serious difficulty. Bahrain's success required a banking infrastructure, a free-enterprise system, a willingness to maintain banking standards, a country small enough to benefit directly from OBU income, and a gap in nearby competing centers. 39 references, 1 figure, 5 tables. (DCK)

  7. An analytical study and systematic monitoring procedure developed for the load-out operation of the North Rankin Jacket 'A'

    SciTech Connect

    Ferguson, N.; Inokoshi, O.; Kitani, T.; Masuda, S.; Zarate, H.

    1983-05-01

    The loadout of the 22,000 tonnes North Rankin Jacket 'A' onto a floating barge was successfully accomplished in April, 1982. During the loadout the barge ballast was continually adjusted to compensate for both jacket weight transfer onto the barge and full tide variation. The preparation for the loadout and the operation itself was characterized by newly developed integrated techniques. The techniques included: the development of a barge, jacket and quayside three-dimensional computer model to check the validity of conventional and simple ballast system software. The model was also used to evaluate the control parameters of the operation in a series of analyses which determine the sensitivity of critical steps of the operation to human or equipment errors: the development and operation of an integrated control system for jacket load transfer that relates jacket position to barge level and ballast pump requirements; the development and operation of a tide-expectation computer programme and associated ballast pump time scheduling software to compensate for differences between actual water level and that determined from standard tide tables, and to minimize the effect of short-term, local tide variations that are not forecast; and the incorporation of fail-safe concepts and measures into the operation.

  8. Visual Simulation of Offshore Liquefied Natural Gas (LNG) Terminals in a Decision-Making Context1

    Microsoft Academic Search

    Brian E. Baird; Stephen R. J. Sheppard; Richard C. Smardon

    Due to legislation passed in 1977, the Coastal Commission tock part in a study analyzing potential offshore Liquified Natural Gas (LNG) sites and the types of terminals that might occupy those sites. The study had to evaluate the engineering feasibility of siting an LNG receiving terminal offshore in relation to the maximum protection of coastal resource provisions required by the

  9. Effects of Offshore Sampling and Testing on Undrained Soil Shear Strength

    Microsoft Academic Search

    A. G. Young; G. Quiros; C. Ehlers

    1983-01-01

    The empirical procedures for offshore foundations design are directly influenced by the shear strength values selected for analyses. There is generally a large amount of scatter in measured undrained shear strength data from offshore borings because of various types of laboratory tests and sample disturbance. A comparison of strength data obtained on samples of cohesive soils from the Gulf of

  10. Offshoring and Directed Technical Change

    E-print Network

    Acemoglu, Daron

    2012-11-24

    To study the short-run and long-run implications on wage inequality, we introduce directed technical change into a Ricardian model of offshoring. A unique final good is produced by combining a skilled and an unskilled ...

  11. Methane Seeps along Offshore Virginia

    USGS Multimedia Gallery

    Numerous distinct methane streams emanating from the seafloor at an upper slope (< 500 m water depth) cold seep site offshore Virginia. Image courtesy of NOAA Okeanos Explorer Program, 2013 Northeast U.S. Canyons Expedition....

  12. Cathodic protection of offshore pipelines

    Microsoft Academic Search

    1981-01-01

    The cost of cathodic protection for minimizing corrosion in offshore natural gas transmission pipelines is insignificant compared with the overall pipeline cost. The cathodic system sometimes remains a last-minute design and procurement item, installed with little supervision and rarely checked until the pipeline has been in service for several years. Typical offshore cathodic-protection-system design parameters are (1) sacrificial zinc anodes

  13. Reassessment of offshore platforms

    SciTech Connect

    Nair, V.V.D.; Kuhn, J.M. (Mobil Research and Development Corporation, Dallas, TX (United States))

    1993-05-01

    Data from Hurricane Andrew demonstrated that the systems and procedures in place for evacuating offshore workers and minimizing oil spills and environmental damage functioned as planned. While the vast majority of the platforms survived the storm with no damage, a few of the older platforms (installed prior to 1972) either collapsed or suffered severe damage. The collapsed platforms were designed with insufficient deck height to clear the storm waves. In recent years, the API RP 2A has introduced guidance for minimum air gap, minimum structures, platform inspection and platform reuse. These provisions, coupled with natural attribution of the older platforms, will significantly improve the performance of platforms in the future. The reliability of NDT techniques to detect major structural defects should be improved through continued research. While flooded member detection is used by several operators as a screening tool to detect major defects underwater, its reliability is not always good and further research is needed in this area. Another area of high priority research is related to the use of Remotely Operated Vehicles (ROV) to perform underwater inspection of structures. 51 refs., 7 figs.

  14. Experimental evaluation of energy efficiency in a gas-heated self-contained steam jacketed kettle

    NASA Astrophysics Data System (ADS)

    Manrique, V.; García, L.; Alfonso, J.

    2014-06-01

    Gas Technological Development Center (CDT de GAS) has developed a new gas-heated self-contained steam jacketed kettle as a solution for temperature-controlled cooking of pulp fruit in the Colombian traditional candy-making industry. This initiative seeks to contribute to the promotion of natural gas as a cleaner and more efficient alternative to traditional fuels such as wood and coal in the Andean countries. Prototype follows the operational and safety rules provided by international and local standards: ASTM-F1602, ASME (section VIII, division 1), and NTC-4082. This paper presents the methodology, experimental setup and results obtained during the performance tests for heating efficiency evaluation of the kettle, according to the ASTM-F1785 standard, and the estimation of measurement uncertainty according to GUM method. The heating efficiency rate for this new prototype is higher to the convectional and commercial models of gas heated self-contained steam jacketed kettle. The results showed a heating efficiency of 63.83% ± 1.66% (k=2), whereas the emission of CO and NOX in stack gases was under the regulate limits for natural gas equipment.

  15. Offshore Wind Energy Market Overview (Presentation)

    SciTech Connect

    Baring-Gould, I.

    2013-07-01

    This presentation describes the current international market conditions regarding offshore wind, including the breakdown of installation costs, how to reduce costs, and the physical siting considerations considered when planning offshore wind construction. The presentation offers several examples of international existing and planned offshore wind farm sites and compares existing international offshore resources with U.S. resources. The presentation covers future offshore wind trends and cites some challenges that the United States must overcome before it will be able to fully develop offshore wind sites.

  16. Water Transportation Demand and Berth Allocation of Offshore Airport

    Microsoft Academic Search

    Wang Nuo; Zhao Bing; Shi Lei; Yang Chunxia

    2009-01-01

    Constructing offshore airport is the development trend of coastal countries. Although this type of airport has advantages such as saving land resources, reducing urban pollution, improving takeoff and landing safety, the transportation connection between the airport and adjacent areas is weakened significantly, which affects the operational efficiency of the airport. Furthermore, the occurrence of natural disasters or certain extreme circumstances

  17. Coupled dynamic analysis of floating offshore wind farms

    E-print Network

    Shim, Sangyun

    2009-05-15

    dynamic analysis of an offshore floating wind turbine system including blade-rotor dynamics and platform motions. As a test case, the TLP-type floater system with 3 blades of 70-m diameter designed by the National Renewable Energy Laboratory (NREL...

  18. Synoptic measurements of episodic offshore flow events in the central mid-Atlantic Bight

    NASA Astrophysics Data System (ADS)

    Dzwonkowski, Brian; Lipphardt, B. L., Jr.; Kohut, Josh T.; Yan, Xiao-Hai; Garvine, Richard W.

    2010-07-01

    Sub-inertial across-shelf flows over the central mid-Atlantic Bight were examined using long-range CODAR SeaSonde type HF-radar surface velocities for the period August 2002 through February 2004. Across-shelf flow in this region was found to be episodic, with offshore flow occurring six times more often than onshore flow. Several recurring spatial patterns in offshore flow are identified, and two of these patterns emerge as statistically significant using empirical orthogonal functions. The most common type of offshore flow was a shelf-wide flow with events occurring throughout the year. The most energetic and well-defined shelf-wide flow events occurred during October through April, when the water column was less stratified. Other offshore flow patterns were more localized, with a flow at the bend or 'point' in the New Jersey coast being most common and most energetic. The offshore flow events identified here are capable of driving significant offshore transport, with more than one-third of offshore flow episodes having potential transport distances of greater than 14 km. In addition, clusters of multiple offshore flow events are shown to be capable of transporting near-surface material across much of the continental shelf.

  19. 76 FR 24504 - National Offshore Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-02

    ...National Offshore Safety Advisory Committee...National Offshore Safety Advisory Committee...Wyndham Riverfront Hotel, Bacchus room...Department of Homeland Security'' and the docket...National Offshore Safety Advisory Committee...and gas offshore industry. Agenda The...

  20. Tailor-made sugar jackets to stop cancerous growth -The Times of India http://web.mit.edu/tox/sasisekharan/toi.html 1 of 2 7/28/2005 9:49 PM

    E-print Network

    Sasisekharan, Ram

    Tailor-made sugar jackets to stop cancerous growth - The Times of India http Model Watch People Pets Remit2India Spirituality Travel Tween Times Women Tailor-made sugar jackets successfully manipulated sugar jackets of cancer cells to keep tumour cells dormant, an important step which

  1. The Offshore Services Global Value Chain

    E-print Network

    Richardson, David

    The Offshore Services Global Value Chain ECONOMIC UPGRADING AND WORKFORCE DEVELOPMENT Karina & COMPETITIVENESS #12;The Offshore Services Global Value Chain: Economic Upgrading and Workforce Development "Skills for Upgrading: Workforce Development and Global Value Chains in Developing Countries" This research project

  2. Offshore Aquaculture in the United States

    E-print Network

    Offshore Aquaculture in the United States: Economic Considerations, Implications & Opportunities from: http://aquaculture.noaa.gov This document should be cited as follows: Rubino, Michael (editor). 2008. Offshore Aquaculture in the United States: Economic Considerations, Implications & Opportunities

  3. Doing Research in a Professional Development School and Why I Feel like Houdini in a Straight Jacket

    ERIC Educational Resources Information Center

    Neapolitan, Jane

    2004-01-01

    When the author was a little girl, her father told her the story of how he once saw the great Harry Houdini escape from a straight jacket. In the early 1900s, Houdini fascinated thousands of people by performing feats of life-threatening daring and agility. Houdini was a professional in the traditional sense: he acted alone, kept his trade secrets…

  4. FROM COAST TO OFFSHORE: SOME PROGRESS ON DEVELOPING MULTI-RESOURCE DESIGNS FOR GREAT LAKES MONITORING

    EPA Science Inventory

    In the next generation of monitoring the condition of very large aquatic systems, we need to explore designs that integrate across multiple aquatic resource types, including coastal subsystems, nearshore, and offshore components, which together make up the total hydroscape. This ...

  5. Offshore wind farm layout optimization

    NASA Astrophysics Data System (ADS)

    Elkinton, Christopher Neil

    Offshore wind energy technology is maturing in Europe and is poised to make a significant contribution to the U.S. energy production portfolio. Building on the knowledge the wind industry has gained to date, this dissertation investigates the influences of different site conditions on offshore wind farm micrositing---the layout of individual turbines within the boundaries of a wind farm. For offshore wind farms, these conditions include, among others, the wind and wave climates, water depths, and soil conditions at the site. An analysis tool has been developed that is capable of estimating the cost of energy (COE) from offshore wind farms. For this analysis, the COE has been divided into several modeled components: major costs (e.g. turbines, electrical interconnection, maintenance, etc.), energy production, and energy losses. By treating these component models as functions of site-dependent parameters, the analysis tool can investigate the influence of these parameters on the COE. Some parameters result in simultaneous increases of both energy and cost. In these cases, the analysis tool was used to determine the value of the parameter that yielded the lowest COE and, thus, the best balance of cost and energy. The models have been validated and generally compare favorably with existing offshore wind farm data. The analysis technique was then paired with optimization algorithms to form a tool with which to design offshore wind farm layouts for which the COE was minimized. Greedy heuristic and genetic optimization algorithms have been tuned and implemented. The use of these two algorithms in series has been shown to produce the best, most consistent solutions. The influences of site conditions on the COE have been studied further by applying the analysis and optimization tools to the initial design of a small offshore wind farm near the town of Hull, Massachusetts. The results of an initial full-site analysis and optimization were used to constrain the boundaries of the farm. A more thorough optimization highlighted the features of the area that would result in a minimized COE. The results showed reasonable layout designs and COE estimates that are consistent with existing offshore wind farms.

  6. Helical piles: an innovative foundation design option for offshore wind turbines.

    PubMed

    Byrne, B W; Houlsby, G T

    2015-02-28

    Offshore wind turbines play a key part in the renewable energy strategy in the UK and Europe as well as in other parts of the world (for example, China). The majority of current developments, certainly in UK waters, have taken place in relatively shallow water and close to shore. This limits the scale of the engineering to relatively simple structures, such as those using monopile foundations, and these have been the most common design to date, in UK waters. However, as larger turbines are designed, or they are placed in deeper water, it will be necessary to use multi-footing structures such as tripods or jackets. For these designs, the tension on the upwind footing becomes the critical design condition. Driven pile foundations could be used, as could suction-installed foundations. However, in this paper, we present another concept-the use of helical pile foundations. These foundations are routinely applied onshore where large tension capacities are required. However, for use offshore, a significant upscaling of the technology will be needed, particularly of the equipment required for installation of the piles. A clear understanding of the relevant geotechnical engineering will be needed if this upscaling is to be successful. PMID:25583860

  7. Incorporation of Multi-Member Substructure Capabilities in FAST for Analysis of Offshore Wind Turbines: Preprint

    SciTech Connect

    Song, H.; Robertson, A.; Jonkman, J.; Sewell, D.

    2012-05-01

    FAST, developed by the National Renewable Energy Laboratory (NREL), is an aero-hydro-servo-elastic tool widely used for analyzing onshore and offshore wind turbines. This paper discusses recent modifications made to FAST to enable the examination of offshore wind turbines with fixed-bottom, multi-member support structures (which are commonly used in transitional-depth waters).; This paper addresses the methods used for incorporating the hydrostatic and hydrodynamic loading on multi-member structures in FAST through its hydronamic loading module, HydroDyn. Modeling of the hydrodynamic loads was accomplished through the incorporation of Morison and buoyancy loads on the support structures. Issues addressed include how to model loads at the joints of intersecting members and on tapered and tilted members of the support structure. Three example structures are modeled to test and verify the solutions generated by the modifications to HydroDyn, including a monopile, tripod, and jacket structure. Verification is achieved through comparison of the results to a computational fluid dynamics (CFD)-derived solution using the commercial software tool STAR-CCM+.

  8. Offshore Drilling With Preformed Stable Foam

    Microsoft Academic Search

    D. L. Hall; R. D. Roberts

    1984-01-01

    Preformed stable foam has proven successful in drilling many onshore underpressured or fluidsensitive formations, however, its use in offshore applications to date has been limited. Recently two redrills were completed offshore in the Santa Barbara Channel with stable foam. Because the operation was performed offshore, it offered new challenges. 1. The use of foam in conjunction with a downhole mud

  9. Mobile robots for offshore inspection and manipulation

    Microsoft Academic Search

    Matthias Bengel; Kai Pfeiffer; Birgit Graf; Alexander Bubeck; Alexander Verl

    2009-01-01

    This paper analyzes the potential to apply mobile service robots in offshore oil and gas producing environments. The required hardware and software components and abilities of such a mobile offshore inspection and manipulation robot are presented in this paper. Possible applications of mobile service robots in an offshore environment range from simple visual inspection tasks to physical intervention with the

  10. Offshore Wind Turbines: Some Technical Challenges

    E-print Network

    Houlsby, Guy T.

    1 Offshore Wind Turbines: Some Technical Challenges Prof. Guy Houlsby FREng Oxford University House engineers concerned with installation of offshore wind turbines. The author is Professor of Civil issues · An example: ­ DTI project on foundations for offshore turbines · Conclusions The talk will begin

  11. Offshore wind farm siting procedures applied offshore of Block Island, Rhode Island

    NASA Astrophysics Data System (ADS)

    O'Reilly, Christopher M.

    Since 2008, the Rhode Island Coastal Resources Management Council (CRMC) has been leading a Rhode Island Ocean Area Management Plan (RIOSAMP) in partnership with the University of Rhode Island, resulting in an extensive multidisciplinary analysis of the Rhode Island offshore environment and its suitability for siting an offshore wind farm. As part of the RIOSAMP project, a standard siting optimization approach was first developed based on a siting index defined as the ratio of costs associated with the wind farm deployment to the available wind resource. This index, combined within a marine spatial planning approach to address ecological and societal constraints, provided an initial macro-siting tool (Spaulding et al., 2010). The multiple GIS layers required in this approach and the absence of theoretical support to optimize the resulting zoning, led to an extension of the initial optimization approach into a more comprehensive macro-siting optimization tool, integrating societal and ecological constraints into the siting tool, the Wind Farm Siting Index (WIFSI) (Grilli et al, 2012). The projects led to the definition of several favorable development areas including a Renewable Energy Zone (REZ) off of Block Island, in State Waters. Deep Water Wind Inc. (DWW) plans to install and commission five 6 MW direct drive Siemens lattice jacket turbines in the REZ area, by 2014. In this thesis two major steps are accomplished to refine and expand the RIOSAMP macro-siting tool. First the macro-siting tool is expanded to include a model simulating the exclusionary zones defined by the Federal Aviation Administration (FAA) regulations. Second a micro-siting model is developed, optimizing the relative position of each turbine within a wind farm area. The micro-siting objective is to minimize, (1) the loss in power due to the loss of wind resource in the wake of the turbines (wake "effect"), and (2) the cable costs that inter-connect the turbines and connecting the farm to the land. The REZ area is chosen as test site for the algorithm, and an optimal layout for the 5 turbines is found and discussed. Similarly the FAA tool is applied to the Block Island airport demonstrating the complexity of the FAA exclusionary area, and defining the limits of the exclusionary areas. The FAA regulation model is a geometric model in which all major (FAA) regulations within RI and the RI topography are embedded. The user specifies the dimension of the proposed turbines and an airport of interest, and a map of exclusionary zones specific to the turbine height and rules applying to the airport is generated. The model is validated for the entire state of Rhode Island. The micro-siting model finds the optimum placement of each turbine for a given number of turbines within an area. It includes the aerodynamic constraints (loss in wind speed within the wake of a turbine) associated to the deployment of arrays of turbines and the cable interconnection cost. It is combined with the technical, ecological, and social constraints used in the RIOSAMP macro-siting tool to provide a comprehensive micro-siting tool. In the optimization algorithm, a simple wake model and turbine-clustering algorithm are combined with the WIFSI in an objective function; the objective function is optimized with a genetic algorithm (GA).

  12. Electrokinetic improvement of offshore foundations

    Microsoft Academic Search

    Silvana Micic

    2003-01-01

    Offshore and near-shore structures for energy exploration and production, harbour work and other facilities are often situated on very soft marine clay deposits that have shear strengths of a few kilopascals. The design of foundations embedded in these soft deposits often poses a challenge for geotechnical engineers, i.e., to satisfy the bearing capacity requirement, while at the same time minimizing

  13. Towers for Offshore Wind Turbines

    Microsoft Academic Search

    V. J. Kurian; S. P. Narayanan; C. Ganapathy

    2010-01-01

    Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy. Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy

  14. National Offshore Wind Energy Grid Interconnection Study

    SciTech Connect

    Daniel, John P. [ABB Inc; Liu, Shu [ABB Inc; Ibanez, Eduardo [National Renewable Energy Laboratory; Pennock, Ken [AWS Truepower; Reed, Greg [University of Pittsburgh; Hanes, Spencer [Duke Energy

    2014-07-30

    The National Offshore Wind Energy Grid Interconnection Study (NOWEGIS) considers the availability and potential impacts of interconnecting large amounts of offshore wind energy into the transmission system of the lower 48 contiguous United States. A total of 54GW of offshore wind was assumed to be the target for the analyses conducted. A variety of issues are considered including: the anticipated staging of offshore wind; the offshore wind resource availability; offshore wind energy power production profiles; offshore wind variability; present and potential technologies for collection and delivery of offshore wind energy to the onshore grid; potential impacts to existing utility systems most likely to receive large amounts of offshore wind; and regulatory influences on offshore wind development. The technologies considered the reliability of various high-voltage ac (HVAC) and high-voltage dc (HVDC) technology options and configurations. The utility system impacts of GW-scale integration of offshore wind are considered from an operational steady-state perspective and from a regional and national production cost perspective.

  15. Extensive open ocean aquaculture development within wind farms in Germany: the prospect of offshore co-management and legal constraints

    Microsoft Academic Search

    Bela Hieronymus Buck; Gesche Krause; Harald Rosenthal

    2004-01-01

    In the offshore region of Germany, human activity is increasing in type and intensity. Larger portions of the sea are sectioned off, dedicated for specific, often exclusive uses that cause rising conflicts between interests groups. One solution calls for stakeholder integration and the multifunctional use of space. This article focuses on two examples, offshore wind farms and open ocean aquaculture.

  16. Offshore hydrodynamics. [Engineering design and research needs for offshore facilities

    SciTech Connect

    Sarpkaya, T. (Naval Postgraduate School, Monterrey, CA (United States). Dept. of Mechanical Engineering)

    1993-02-01

    In this paper, the author presents several applied as well as fundamental research problems related to the future needs of the offshore engineering. The paper starts out with a detailed discussion of the current uncertainties and constraints. Then, specific research issues on environmental input conditions, on the role of computational fluid dynamics, and on damping and dynamic response are presented. It is suggested that an appreciation of the input parameters, acquisition of extensive data to properly characterize the ocean environment, development of new methods and tools to acquire relevant data, extensive use of the computational methods, basic/applied research on the dynamic response and damping of structures, use of new materials, science-and-technology transfer from sister disciplines (e.g., aerospace industry, keeping in mind the complexities brought about by the presence of the air-water interface), and other related research will significantly enhance ones ability to design and build a variety of safer and economical offshore structures in deeper waters as well as over marginal fields in the next few decades. This herculean effort will require several decades of complementary experimental, numerical and analytical studies of ocean-structure interaction which will serve to elucidate the basic as well as applied fluid mechanics phenomena relevant to the offshore mechanics.

  17. Stress-induced martensitic transformation during tensile test of full-size TF conductor jacket tube at 4.2 K

    NASA Astrophysics Data System (ADS)

    Yang, H. H.; Wu, Z. X.; Huang, C. J.; Huang, R. J.; Li, S. P.; Li, L. F.

    2014-01-01

    The toroidal-field (TF) conductor jacket of International Thermonuclear Experimental Reactor (ITER) is made of modified 316LN stainless steel, which is influenced by heat treatment at approximately 650 °C for 200 h to produce Nb3Sn superconducting materials at the final stage. Due to the high electromagnetic forces arising during magnet operation, higher mechanical properties of the jacket materials at cryogenic temperatures are required. In our work, mechanical properties of the full-size TF conductor jacket tube were investigated, which satisfied the ITER requirements. Stress-induced martensitic transformation mechanism during tensile test of the conductor jacket material at 4.2 K was characterized by means of in-situ temperature dependent XRD, vibrating sample magnetometer (VSM) and in conjunction with transmission electron microscopy (TEM). The tensile behavior related to the amount of stress-induced phase transformation at cryogenic temperature was also discussed.

  18. Fatigue handbook: Offshore steel structures

    SciTech Connect

    Almarnaess, A.

    1985-01-01

    The contents of this book are: Overview of Offshore Steel Structures; Loads on Ocean Structures; Fracture Mechanics As a Tool in Fatigue Analysis; Basic Fatigue Properties of Welded Joints; Significance of Defects; Improving the Fatigue Strength of Welded Joints; Effects of Marine Environment and Cathodic Protection on Fatigue of Structural Steels Fatigue of Tubular Joints; Unstable Fracture; Fatigue Life Calculations; and Fatigue in Building Codes Background and Applications.

  19. Offshoring in the Semiconductor Industry: Historical Perspectives

    Microsoft Academic Search

    Clair Brown; Greg Linden

    2005-01-01

    Semiconductor design is a frequently-cited example of the new wave of offshoring and foreign-outsourcing of service sector jobs. It is certainly a concern to U.S. design engineers themselves. In addition to the current wave of white-collar outsourcing, the industry also has a rich experience with offshoring of manufacturing activity. Semiconductor companies were among the first to invest in offshore facilities

  20. 1991 worldwide offshore contractors and equipment directory

    SciTech Connect

    Not Available

    1991-01-01

    This book is the information source-book for the international offshore oil industry. Within this single convenient reference you'll find addresses, phone numbers, telex, fax and cable listings for more than 3,500 companies and their key personnel in the drilling, workover, construction, service/supply/manufacturers, geophysical, diving and transportation segments of the offshore industry. Along with this vital contact information, the authors include such pertinent data as rig specifications, ownership, an equipment index, a company index and a current survey of offshore production systems from Offshore Incorporating the Oilman.

  1. Offshore Coastal Wind Speed Gradients: issues for the design and development of large offshore windfarms

    E-print Network

    Pryor, Sara C.

    indicates that within the coastal zone, wind speeds at typical turbine hub-heights can change by 2 m/s over the area of the wind farm appear to be small and negligible. 1. INTRODUCTION As large offshore wind farmsOffshore Coastal Wind Speed Gradients: issues for the design and development of large offshore

  2. 76 FR 11503 - National Offshore Safety Advisory Committee; Vacancies

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-02

    ...safety and training related to offshore exploration and construction...representing enterprises specializing in offshore drilling. To be eligible, applicants for...exploration for and the recovery of offshore mineral resources....

  3. 76 FR 39410 - National Offshore Safety Advisory Committee; Vacancies

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-06

    ...have recent practical experience on vessels or offshore units involved in the offshore mineral and energy industry; (d) One member representing enterprises specializing in offshore drilling; and, (e) One member representing...

  4. 77 FR 17491 - National Offshore Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-26

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard [Docket...National Offshore Safety Advisory Committee...Department of Homeland Security. ACTION: Committee...National Offshore Safety Advisory Committee...and gas offshore industry. These meetings...New Orleans Arts Hotel, 700...

  5. Cost of Offshore Wind Energy Charlene Nalubega

    E-print Network

    Mountziaris, T. J.

    Cost of Offshore Wind Energy water as well as on land based wind farms. The specific offshore wind energy case under consideration kilowatt Hour will be determined. Wind Energy has been around for a very long time. It started as out

  6. Offshore investment funds: monsters in emerging markets?

    Microsoft Academic Search

    Woochan Kim; Shang-Jin Wei

    2002-01-01

    Relative to onshore funds, offshore funds are subject to less taxes and regulation. So they may trade more aggressively and do so in ways that could destabilize the emerging markets. We study the behavior of the offshore funds in Korea and compare them with the onshore funds. Evidence suggests that they do trade more frequently. However, they do not engage

  7. OFFSHORE WIND FARMS Guidance note for Environmental

    E-print Network

    OFFSHORE WIND FARMS Guidance note for Environmental Impact Assessment In respect of FEPA and CPA requirements Version 2 - June 2004 #12;Offshore Wind Farms: Guidance Note for Environmental Impact Assessment and Aquaculture Science (CEFAS) on behalf of the Marine Consents and Environment Unit (MCEU) © Crown Copyright

  8. System Reliability Assessment of Offshore Pipelines

    Microsoft Academic Search

    Z. Mustaffa

    2011-01-01

    The title of this thesis, System Reliability Assessment of Offshore Pipelines, portrays the application of probabilistic methods in assessing the reliability of these structures. The main intention of this thesis is to identify, apply and judge the suitability of the probabilistic methods in evaluating the system reliability of offshore pipelines subjected to corrosion. The analysis was first emphasized on interpreting

  9. 44 MArch 2006 Can offshore aquaculture

    E-print Network

    Miami, University of

    44 MArch 2006 Can offshore aquaculture of carnivorous fish be sustainable? Case studies from and pollution concerns sug- gest that major environmental benefits are to be gained by moving cage aquaculture development of offshore aquaculture through university-industry-government partnerships. Emerging technology

  10. Underbalanced drilling benefits now available offshore

    SciTech Connect

    Vozniak, J.P.; Cuthbertson, B.; Nessa, D.O.

    1997-05-01

    Offshore underbalanced drilling (UBD) is a reality. Applications in older, partially depleted fields and new fields are being considered. However, low productivity reservoirs and fields with sub normal pressures causing drilling problems are currently the main targets for offshore UBD. With proper planning and the correct technique, both jointed pipe and coiled tubing UBD drilling operations have been carried out offshore with success. The main concerns for offshore UBD have been altered drilling practices and surface production system operation. These issues have been examined and equipment has been designed and tested to address them. Environmental, safety and health issues are paramount and have been studied carefully. Detailed well planning, engineering, and flow modeling have proven critical for successful offshore UBD operations. Examples are given from oil and gas fields.

  11. Aeroelastic Modeling of Offshore Turbines and Support Structures in Hurricane-Prone Regions (Poster)

    SciTech Connect

    Damiani, R.

    2014-03-01

    US offshore wind turbines (OWTs) will likely have to contend with hurricanes and the associated loading conditions. Current industry standards do not account for these design load cases (DLCs), thus a new approach is required to guarantee that the OWTs achieve an appropriate level of reliability. In this study, a sequentially coupled aero-hydro-servo-elastic modeling technique was used to address two design approaches: 1.) The ABS (American Bureau of Shipping) approach; and 2.) The Hazard Curve or API (American Petroleum Institute) approach. The former employs IEC partial load factors (PSFs) and 100-yr return-period (RP) metocean events. The latter allows setting PSFs and RP to a prescribed level of system reliability. The 500-yr RP robustness check (appearing in [2] and [3] upcoming editions) is a good indicator of the target reliability for L2 structures. CAE tools such as NREL's FAST and Bentley's' SACS (offshore analysis and design software) can be efficiently coupled to simulate system loads under hurricane DLCs. For this task, we augmented the latest FAST version (v. 8) to include tower aerodynamic drag that cannot be ignored in hurricane DLCs. In this project, a 6 MW turbine was simulated on a typical 4-legged jacket for a mid-Atlantic site. FAST-calculated tower base loads were fed to SACS at the interface level (transition piece); SACS added hydrodynamic and wind loads on the exposed substructure, and calculated mudline overturning moments, and member and joint utilization. Results show that CAE tools can be effectively used to compare design approaches for the design of OWTs in hurricane regions and to achieve a well-balanced design, where reliability levels and costs are optimized.

  12. Ice island creation, drift, recurrences, mechanical properties, and interactions with arctic offshore oil production structures

    SciTech Connect

    Sackinger, W.M.; Jeffries, M.O.; Li, Fucheng; Lu, Mingchi.

    1991-03-01

    Research and engineering studies on first-year sea ice for over two decades has resulted in the design, construction, and operation of jacket platforms, of artificial islands, and of massive gravity structures which routinely withstand moving sea ice of thickness up to 2 meters. However, the less-common interactions between such structures and moving multiyear ice ([ge]3 meters thick), and also moving ice islands (10 to 60 meters thick) remain as the unknown and potentially most serious hazard for Arctic offshore structures. In this study, research was addressed across the complete span of remaining questions regarding such features. Ice island components, thickness distributions, scenarios and models for the interactions of massive ice features with offshore structures, all were considered. Ice island morphology and calving studies were directed at the cluster of 19 ice islands produced in a calving from the Ward Hunt Ice Shelf on Ellesmere Island in 1983, and also at a calving from the Milne Ice Shelf in 1988. The statistics of ice island dynamics, on both a short-term small-scale basis and also on a long-term basis, were studied. Typical wind velocities of 5 to 7.5 meters per second led to ice island speeds of about 0.014 of the wind speed, at an angle of 20[degrees] to the right of the wind direction. Ice island samples were tested for their stress/strain characteristics. Compressive strength values ranged from 1.64 MPa at a strain rate of 2 [times] 10[sup [minus]7] s[sup [minus]1] to 6.75 MPa at a strain rate of 1 [times] 10[sup [minus]3] s[sup [minus]1]. Scenarios for ice island/structure interactions were developed, and protective countermeasures such as spray ice and ice rubble barriers were suggested. Additional computer modeling of structure/ice interactions for massive ice features is recommended.

  13. Electrokinetic improvement of offshore foundations

    NASA Astrophysics Data System (ADS)

    Micic, Silvana

    Offshore and near-shore structures for energy exploration and production, harbour work and other facilities are often situated on very soft marine clay deposits that have shear strengths of a few kilopascals. The design of foundations embedded in these soft deposits often poses a challenge for geotechnical engineers, i.e., to satisfy the bearing capacity requirement, while at the same time minimizing the embedment depth and dimensions of the foundation due to cost considerations. The present study investigates the possibility of using electrokinetics to strengthen the soil adjacent to skirted foundations embedded in soft marine deposits and, thus, to improve the load carrying capacity of the foundations. The innovative feature of this approach as compared to soil improvement methods commonly adopted in practice is that the focus of strengthening is on the interface between the soil and embedded foundation, in terms of enhancement of adhesion and cementation. The thesis presents a summary of the method and results of a series of electrokinetic tests conducted on natural and simulated marine clays in small-scale and large-scale laboratory testing facilities. Steel plates and steel cylinders are used to simulate skirted foundations. A low dc voltage is applied via steel electrodes installed around the foundation models. The effects of electrokinetics are evaluated through changes in the geotechnical properties of the soil and load carrying capacities of the foundation model after treatment. The results demonstrate that the load carrying capacity of the skirted foundation model and the undrained shear strength of the adjacent soil increase by a factor of three after electrokinetic treatment. The clay adheres strongly to the inside and outside walls of the foundation model, indicating bonding occurs between the soil and steel after treatment. The treatment increases the soil undrained modulus and also induces a preconsolidation pressure of the remoulded clay, thereby reducing potential settlement of the foundation. The new technology described in this thesis has potential application in offshore engineering for increasing the load carrying capacity of skirted foundations installed in soft clayey sediments, as well as for rehabilitation of existing offshore structures.

  14. Offshore Wind Plant Balance-of-Station Cost Drivers and Sensitivities (Poster)

    SciTech Connect

    Saur, G.; Maples, B.; Meadows, B.; Hand, M.; Musial, W.; Elkington, C.; Clayton, J.

    2012-09-01

    With Balance of System (BOS) costs contributing up to 70% of the installed capital cost, it is fundamental to understanding the BOS costs for offshore wind projects as well as potential cost trends for larger offshore turbines. NREL developed a BOS model using project cost estimates developed by GL Garrad Hassan. Aspects of BOS covered include engineering and permitting, ports and staging, transportation and installation, vessels, foundations, and electrical. The data introduce new scaling relationships for each BOS component to estimate cost as a function of turbine parameters and size, project parameters and size, and soil type. Based on the new BOS model, an analysis to understand the non-turbine costs associated with offshore turbine sizes ranging from 3 MW to 6 MW and offshore wind plant sizes ranging from 100 MW to 1000 MW has been conducted. This analysis establishes a more robust baseline cost estimate, identifies the largest cost components of offshore wind project BOS, and explores the sensitivity of the levelized cost of energy to permutations in each BOS cost element. This presentation shows results from the model that illustrates the potential impact of turbine size and project size on the cost of energy from US offshore wind plants.

  15. Quantifying the benefits of a slender, high tip speed blade for large offshore wind turbiness

    NASA Astrophysics Data System (ADS)

    Blonk, Lindert; Rainey, Patrick; Langston, David A. J.; Vanni, Francesco

    2014-06-01

    An in-depth study has been completed to study the effects of slender, flexible blades in combination with high rotor speed operation on load mitigation, targeted at cost reductions of the structural components of large wind turbines, consequently lowering the levelized cost of energy. An overview of existing theory of sensitivity of turbine fatigue loading to the blade chord and rotor speed was created, and this was supplemented by a proposed theory for aboverated operation including the pitch controller. A baseline jacket-supported offshore turbine (7 MW) was defined, of which the blade was then redesigned to be more slender and flexible, at the same time increasing rotor speed. The blade redesign and optimisation process was guided by cost of energy assessments using a reduced loadset. Thereafter, a full loadset conform IEC61400-3 was calculated for both turbines. The expected support structure load reductions were affirmed, and it was shown that reductions of up to 18.5% are possible for critical load components. Cost modelling indicated that turbine and support structure CapEx could be reduced by 6%. Despite an energy production reduction of 0.44% related to the thicker airfoils used, the blade redesign led to a reduction in Cost of Energy.

  16. Simplified rotor load models and fatigue damage estimates for offshore wind turbines.

    PubMed

    Muskulus, M

    2015-02-28

    The aim of rotor load models is to characterize and generate the thrust loads acting on an offshore wind turbine. Ideally, the rotor simulation can be replaced by time series from a model with a few parameters and state variables only. Such models are used extensively in control system design and, as a potentially new application area, structural optimization of support structures. Different rotor load models are here evaluated for a jacket support structure in terms of fatigue lifetimes of relevant structural variables. All models were found to be lacking in accuracy, with differences of more than 20% in fatigue load estimates. The most accurate models were the use of an effective thrust coefficient determined from a regression analysis of dynamic thrust loads, and a novel stochastic model in state-space form. The stochastic model explicitly models the quasi-periodic components obtained from rotational sampling of turbulent fluctuations. Its state variables follow a mean-reverting Ornstein-Uhlenbeck process. Although promising, more work is needed on how to determine the parameters of the stochastic model and before accurate lifetime predictions can be obtained without comprehensive rotor simulations. PMID:25583872

  17. Offshore drilling, construction: Fortunes tied to stable gas prices

    Microsoft Academic Search

    S. S. Pagano; T. Marsh

    1993-01-01

    Significantly improved US natural gas prices fueled an upswing in offshore drilling in the Gulf of Mexico in late 1992. Stabilized gas prices will be necessary to support both the off-shore drilling and construction markets in 1993 and beyond. The article discusses both these segments in detail: offshore drilling and offshore construction.

  18. An Economic Evaluation Method of Offshore Drilling Platform Overhaul Projects

    Microsoft Academic Search

    Luo Dong-kun; Dai You-jin

    2009-01-01

    The stable and efficient operation of offshore drilling platform is the prerequisite that enable success of offshore petroleum exploration and development activities. Offshore drilling platforms are often required periodical overhaul to restore its operational capacity after long time use in the marine environment. However, not all offshore drilling platform overhaul projects are economically feasible. In order to determine the economic

  19. Quantifying the hurricane risk to offshore wind turbines

    E-print Network

    Jaramillo, Paulina

    Quantifying the hurricane risk to offshore wind turbines Stephen Rosea , Paulina Jaramilloa,1 GW will be required from shallow offshore turbines. Hurricanes are a potential risk to these turbines be destroyed by hurricanes in an offshore wind farm. We apply this model to estimate the risk to offshore wind

  20. Offshore well test platform system

    SciTech Connect

    Chiu, H.; Nelsen, D.K.

    1990-03-06

    This patent describes an offshore well test platform system positionable above one or more underwater wells. It comprises: a submergible buoy to be restrained below the surface of the water and above one or more underwater wells; a platform structure connectable to the buoy and having an upper portion extending above the surface of the water when connected to the buoy in an installed condition; a well test platform deck connected to the upper portion of the platformed structure; flexible riser means extendable between the one or more underwater wells and the platform deck for providing passage therethrough for well test or workover operations; and restraining means for connecting the submerged buoy to subsea anchors. The restraining means consists of equally spaced, laterally extending tensioned anchoring means having a single intersection of mooring forces at or above the platform deck.

  1. Offshore drilling to increase in 1984

    SciTech Connect

    Not Available

    1984-05-01

    A mid-year report presents a worldwide overview of offshore drilling operations. The Gulf of Mexico and the North Sea are posting substantial gains as companies rush to drill the millions of acres acquired in those sectors both last year and in previous offerings. The Middle East, Latin America and the Asia/Pacific offshore theaters will see only slight increases. The Mediterranean and African regions are expected to sustain declines. A region-by-region summary of the 1984 offshore forecast is presented showing exploration and appraisal activities, as well as development for all of these areas.

  2. Verification of the New FAST v8 Capabilities for the Modeling of Fixed-Bottom Offshore Wind Turbines: Preprint

    SciTech Connect

    Barahona, B.; Jonkman, J.; Damiani, R.; Robertson, A.; Hayman, G.

    2014-12-01

    Coupled dynamic analysis has an important role in the design of offshore wind turbines because the systems are subject to complex operating conditions from the combined action of waves and wind. The aero-hydro-servo-elastic tool FAST v8 is framed in a novel modularization scheme that facilitates such analysis. Here, we present the verification of new capabilities of FAST v8 to model fixed-bottom offshore wind turbines. We analyze a series of load cases with both wind and wave loads and compare the results against those from the previous international code comparison projects-the International Energy Agency (IEA) Wind Task 23 Subtask 2 Offshore Code Comparison Collaboration (OC3) and the IEA Wind Task 30 OC3 Continued (OC4) projects. The verification is performed using the NREL 5-MW reference turbine supported by monopile, tripod, and jacket substructures. The substructure structural-dynamics models are built within the new SubDyn module of FAST v8, which uses a linear finite-element beam model with Craig-Bampton dynamic system reduction. This allows the modal properties of the substructure to be synthesized and coupled to hydrodynamic loads and tower dynamics. The hydrodynamic loads are calculated using a new strip theory approach for multimember substructures in the updated HydroDyn module of FAST v8. These modules are linked to the rest of FAST through the new coupling scheme involving mapping between module-independent spatial discretizations and a numerically rigorous implicit solver. The results show that the new structural dynamics, hydrodynamics, and coupled solutions compare well to the results from the previous code comparison projects.

  3. Offshore sand resources for coastal erosion control in Louisiana

    SciTech Connect

    Ramsey, K.E.; Penland, S.; McBride, R.A. (Louisiana Geological Survey, Baton Rouge (USA)); Suter, J.R. (Exxon Production Research, Houston, TX (USA)); Williams, J. (Geological Survey, Reston, VA (USA))

    1990-09-01

    An inventory of existing geophysical data supplemented by more than 15,000 km of high-resolution seismic profiles and 400 vibracores collected cooperatively by the Louisiana Geological Survey and US Geological Survey since 1981 indicates that a wide range of aggregate minerals occurs on the continental shelf in a variety of depositional settings. The distribution of these deposits is controlled by the geometry of the preexisting fluvial and deltaic channel systems and the stratigraphic signature of the Holocene Transgression across these features. The geology of coastal and offshore Louisiana is tied to the depositional history of the Mississippi River. Offshore of the delta plain, five types of aggregate sources can be identified: inner shelf shoals, submerged barrier islands, tidal inlets, distributary channels, and barrier platforms. This paper describes the geology of offshore Louisiana, the available geophysical data sets, and the distribution of aggregate mineral resources. On the continental shelf of the Mississippi River delta plain, two extensive seismic survey grids have been developed by the Louisiana Geological Survey and US Geological Survey. The most prospective resources found are the huge sand bodies of Ship Shoal and associated distributaries, Cat Island Pass tidal channels and associated tidal deltas, and Barataria Pass/Grand Terre tidal channels and associated tidal deltas. East of the mouth of the Mississippi River are the Chandeleur Islands, where LGS identified seven major sand resource targets, truncated barrier-spit and tidal inlet deposits, submerged beach ridges, and distributaries associated with abandoned St. Bernard delta complexes. Abundant sand resources can be found in offshore Louisiana. Many of the sand bodies contain heavy minerals, but their concentration and distribution is unknown. Other potential sand resources not yet adequately explored include Sabine Bank, the Outer Shoal, and the St. Bernard shoal.

  4. Psychosocial burden among offshore drilling platform employees.

    PubMed

    Leszczy?ska, Irena; Je?ewska, Maria

    2010-01-01

    Conditions of work on offshore drilling platforms are particularly hard due to extreme environmental situations created both by nature and technological processes. Oil drilling workers employed on the open sea are potentially exposed to permanently high stress. Apart from the obvious objective factors affecting drilling platform employees, a great role in the general work-related stress level is played by the working conditions and work-related psychosocial factors, defined according to Karask's concept as demands, control, and social support. A total of 184 drill platform workers were examined using objective and subjective research methods. The level of subjective stress among drilling platform workers is lower than the level of objective stress and the stress resulting from prognoses related with specificity of work in extremely hard conditions (audit). The examinations of drilling platform workers reveal a positive role of stress in psychological adaptation, being a special case of the "work ethos" and attachment to the firm. In such investigations of work-related stress on drilling platforms, which are very specific workplaces, a multi-aspect character, sociological and economic aspects, organizational culture conditions in the firm, and a tendency to conceal ailments and the stress experienced should be taken into account. It is important to apply measures referring to at least three different types of evidence (objective demands, subjective stress, health problems reported). Otherwise, the result reflecting work-related stress may not be objective and far from the truth. PMID:21154303

  5. 31 CFR 576.407 - Offshore transactions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS Interpretations § 576.407 Offshore transactions. The...

  6. 31 CFR 576.407 - Offshore transactions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS Interpretations § 576.407 Offshore transactions. The...

  7. 31 CFR 576.407 - Offshore transactions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS Interpretations § 576.407 Offshore transactions. The...

  8. 31 CFR 576.407 - Offshore transactions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS Interpretations § 576.407 Offshore transactions. The...

  9. Offshore oil in the Alaskan Arctic

    NASA Technical Reports Server (NTRS)

    Weeks, W. F.; Weller, G.

    1984-01-01

    Oil and gas deposits in the Alaskan Arctic are estimated to contain up to 40 percent of the remaining undiscovered crude oil and oil-equivalent natural gas within U.S. jurisdiction. Most (65 to 70 percent) of these estimated reserves are believed to occuur offshore beneath the shallow, ice-covered seas of the Alaskan continental shelf. Offshore recovery operations for such areas are far from routine, with the primary problems associated with the presence of ice. Some problems that must be resolved if efficient, cost-effective, environmentally safe, year-round offshore production is to be achieved include the accurate estimation of ice forces on offshore structures, the proper placement of pipelines beneath ice-produced gouges in the sea floor, and the cleanup of oil spills in pack ice areas.

  10. 31 CFR 541.406 - Offshore transactions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS Interpretations § 541.406 Offshore transactions. The prohibitions in § 541.201 on...

  11. Embedded knowledge and offshore software development

    E-print Network

    Sahay, Sundeep

    on evidence from a longitudinal case study of a British software company with an offshore subsidiary in India of Accounting and Finance, University of Manchester, Mezzanine Floor, Crawford House, Booth Street East

  12. EMS offshore. A new horizon for paramedics.

    PubMed

    Mallard, A S

    1991-10-01

    The difficulty in getting medical aid to offshore drilling platforms can be a source of life-threatening delays. Recently, some companies have charted new waters by actually stationing EMS crews on their rigs. PMID:10116023

  13. 31 CFR 586.407 - Offshore transactions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FEDERAL REPUBLIC OF YUGOSLAVIA (SERBIA & MONTENEGRO) KOSOVO SANCTIONS REGULATIONS Interpretations § 586.407 Offshore transactions. (a) The prohibitions contained...

  14. Outsourcing, offshoring and the US office market

    E-print Network

    Topolewski, Tanya M., 1969-

    2004-01-01

    There is intense debate among industry analysts and scholars over potential job losses caused by offshoring. The real estate industry has been grappling to understanding the implications of these numbers, as some have ...

  15. Visualization of vibration experienced in offshore platforms

    E-print Network

    Patrikalakis, Alexander Marinos Charles

    2010-01-01

    In this thesis, I design and evaluate methods to optimize the visualization of vortex-induced vibration (VIV) in marine risers. VIV is vibration experienced by marine risers in offshore drilling platforms due to ocean ...

  16. System architecture of offshore oil production systems

    E-print Network

    Keller, James (James Thomas)

    2008-01-01

    This thesis presents an approach to applying Systems Architecture methods to the development of large, complex, commercial systems, particularly offshore oil and gas productions systems. The aim of this research was to ...

  17. 31 CFR 541.406 - Offshore transactions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS Interpretations § 541.406 Offshore transactions. The prohibitions in § 541.201 on...

  18. 31 CFR 541.406 - Offshore transactions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS Interpretations § 541.406 Offshore transactions. The prohibitions in § 541.201 on...

  19. 31 CFR 541.406 - Offshore transactions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS Interpretations § 541.406 Offshore transactions. The prohibitions in § 541.201 on...

  20. 31 CFR 541.406 - Offshore transactions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS Interpretations § 541.406 Offshore transactions. The prohibitions in § 541.201 on...

  1. 31 CFR 544.406 - Offshore transactions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS Interpretations § 544.406 Offshore transactions. The...

  2. 31 CFR 544.406 - Offshore transactions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS Interpretations § 544.406 Offshore transactions. The...

  3. 31 CFR 544.406 - Offshore transactions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS Interpretations § 544.406 Offshore transactions. The...

  4. 31 CFR 544.406 - Offshore transactions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS Interpretations § 544.406 Offshore transactions. The...

  5. 31 CFR 544.406 - Offshore transactions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS Interpretations § 544.406 Offshore transactions. The...

  6. New perspectives in offshore wind energy.

    PubMed

    Failla, Giuseppe; Arena, Felice

    2015-02-28

    The design of offshore wind turbines is one of the most fascinating challenges in renewable energy. Meeting the objective of increasing power production with reduced installation and maintenance costs requires a multi-disciplinary approach, bringing together expertise in different fields of engineering. The purpose of this theme issue is to offer a broad perspective on some crucial aspects of offshore wind turbines design, discussing the state of the art and presenting recent theoretical and experimental studies. PMID:25583869

  7. New perspectives in offshore wind energy

    PubMed Central

    Failla, Giuseppe; Arena, Felice

    2015-01-01

    The design of offshore wind turbines is one of the most fascinating challenges in renewable energy. Meeting the objective of increasing power production with reduced installation and maintenance costs requires a multi-disciplinary approach, bringing together expertise in different fields of engineering. The purpose of this theme issue is to offer a broad perspective on some crucial aspects of offshore wind turbines design, discussing the state of the art and presenting recent theoretical and experimental studies. PMID:25583869

  8. 46 CFR 11.470 - Officer endorsements as offshore installation manager.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...endorsements as offshore installation manager. 11.470...endorsements as offshore installation manager. (a...endorsements as offshore installation manager (OIM) include... (i) Provides a description of the...

  9. Norwegian Offshore Stratigraphic Lexicon (NORLEX)

    NASA Astrophysics Data System (ADS)

    Gradstein, Felix M.; Hammer, Oyvind; Brunstad, Harald; Charnock, Mike; Hellem, Terje; Sigve Lervik, Kjell; Anthonissen, Erik

    2010-05-01

    The Norwegian Offshore Stratigraphic Lexicon (NORLEX) provides a relational stratigraphic database for the North Sea, Norwegian Sea, Barents Sea and Svalbard. Both regional lithostratigraphy and biostratigraphy are being substantially updated, following guidelines laid out in the International Stratigraphic Guide. The main body of information developed is available as a petroleum consortium (oracle-style) database, and the new lithostratigraphic definitions as a public domain (paper) document. NORLEX is presented as a browsing website via the internet at http://www.nhm.uio.no/norlex. Seismic cross-sections, core photographs, well logs, field outcrops, microfossil occurrences and other vital attributes are relationally cross-linked. In addition, there are menus for instantly finding updated formation and member tops or microfossil events in all wells, plus a map contouring routine for unit thicknesses and depths. Several new initiatives will expand data and user coverage: 1. Overhaul of Mesozoic stratigraphy, especially Triassic and Cretaceous, in the Barents Sea. 2. Coverage of East Greenland 3. Linkage to UK and Belgium and The Netherlands surface and subsurface stratigraphy 4. Creation of a Sequence Stratigraphic Framework for specific regions. 5. A national microfossil atlas to support zonations 6. Tight linkage to the basin datapacks in TimeScaleCreator Pro, as developed for Australia, New Zealand, Brasil, Gulf of Mexico, Canada and Russia. NORLEX may thus evolve to become STRATLEX, covering many basin regions.

  10. Problems unique to offshore measurement

    SciTech Connect

    Young, J.G. [ANR Pipeline Co., Lafayette, LA (United States)

    1995-12-01

    Most of us have arrived at this meeting in some kind of company provided transportation. This is supplied in order for us to do our assigned jobs. These may be trucks, or cars, or even helicopters, and maybe boats. All who are involved in the offshore industry know that transportation is the cost costly of all. The helicopter bill for our company is a bill which costs us somewhere in the 9 million dollar range. Since this costs us so much, we are constantly looking at ways to reduce this. The helicopters we use cost us $510.00 a flying hour plus $28,000.00 a month for lease. These helicopters fly in the neighborhood of 140 miles per hour. You can quickly see how fast the cost can climb. We have two technicians, along with a pilot, and approx. 400 lbs of test gear and spare parts. You have to carry all you think you will need for the day`s activities because it`s a long and costly trip to go pick up some gasket material or an orifice plate.

  11. "I wanted to make sure that I liked my Reunion jacket," Lisa Washington laughs. "Maybe not the best rationale for volunteering

    E-print Network

    "I wanted to make sure that I liked my Reunion jacket," Lisa Washington laughs. "Maybe not the best that my co-chair Christie Coates and I raised our hands!" No newcomer to Reunions committees, Washington the opportunity to continue my involvement in theater and dance. I loved my time in Triangle, Expressions

  12. Inflammatory Role of Two Venom Components of Yellow Jackets (Vespula vulgaris): A Mast Cell Degranulating Peptide Mastoparan and Phospholipase A1

    Microsoft Academic Search

    Te Piao King; Sui Yee Jim; Knut M. Wittkowski

    2003-01-01

    Background: Venom sac extract of yellow jackets Vespula vulgaris was toxic in mice when injected intraperitoneally but not toxic when injected subcutaneously. Necropsy showed the toxicity to be an inflammatory response. Methods: Venom peptide and protein fractions were tested to identify the inflammatory components. The active components were tested to establish whether they might function as adjuvant for venom protein-specific

  13. Comparison of different approaches to load calculation for the OWEC Quattropod jacket support structure

    NASA Astrophysics Data System (ADS)

    Zwick, D.; Schafhirt, S.; Brommundt, M.; Muskulus, M.; S, Narasimhan; Mechineau, J.; Haugsøen, P. B.

    2014-12-01

    Accurate load simulations are necessary in order to design cost-efficient support structures for offshore wind turbines. Due to software limitations and confidentiality issues, support structures are often designed with sequential analyses, where simplified wind turbine and support structure models replace more detailed models. The differences with an integrated analysis are studied here for a commercial OWEC Quattropod. Integrated analysis seems to generally predict less damage than sequential analysis, decreasing by 30-70 percent in two power production cases with small waves. Additionally it was found that using a different realization of the wave forces for the retrieval run in sequential analysis leads to an increase of predicted damage, which can be explained as the effect of applying two independent wave force series at the same time. The midsection of the detailed support structure model used shell elements. Additional analyses for a model with an equivalent beam model of the midsection showed only small differences, mostly overpredicting damage by a few percent. Such models can therefore be used for relatively accurate analysis, if carefully calibrated.

  14. ABA Type Triblock Copolymer Based on Mesogen-Jacketed Liquid Crystalline Polymer: Design, Synthesis, and Potential as Thermoplastic

    E-print Network

    Wan, Xin-hua

    are elastomeric. Preliminary mechanical tests were done on their films. Typical dynamic mechanical analysis by nuclear magnetic resonance. Curves of differential scanning calorimetry indicate the immiscibility and tensile tests prove that the sample has the potential as thermoplastic elastomers (TPEs). According to our

  15. Wave energy conversion with an oscillating water column on a fixed offshore platform

    Microsoft Academic Search

    W. L. Green; J. J. Campo; J. B. Miles; J. A. Miller; J. E. Parker

    1983-01-01

    The purpose of this study is to examine the feasibility of practical wave energy conversion using an oscillating water column (OWC) and a counter-rotating turbine on a fixed offshore platform. A linear array of such platforms along a coastline, with the power transmitted ashore by submarine cable, constitutes the type of wave energy powerplant discussed herein. The OWC concept utilizes

  16. Dream of marine-topia: New technologies to utilize effectively renewable energies at offshore

    Microsoft Academic Search

    Toshiaki Kanemoto

    2010-01-01

    For the next leap in the sustainable technologies, we are under obligations not only to cope with the warming global environment but also to conserve natural ecosystem and to coexist with nature. This paper introduces the following advanced technologies in Kyushu Institute of Technology, to utilize effectively the promising ocean and wind resources at the offshore. (1) Counter-Rotating Type Reversible

  17. Advanced Technologies For Turbomachinery to Utilize Effectively Renewable Energies at Offshore

    Microsoft Academic Search

    Toshiaki Kanemoto

    2010-01-01

    For the next leap in the sustainable energy exploitations, we are under obligations not only to cope with the warming global environment but also to conserve natural ecosystems and to coexist with natures. This paper introduces the following advanced technologies in Kyushu Institute of Technology, to utilize effectively the promising ocean and wind resources at the offshore. (1) Counter-Rotating Type

  18. A Comparison of Methods for Sampling Fish Diversity in Shallow Offshore Waters of Large Rivers

    Microsoft Academic Search

    Nicolas W. R. Lapointe; Lynda D. Corkum; Nicholas E. Mandrak

    2006-01-01

    Few studies of fish assemblages have been conducted in large rivers owing to the difficulties of sampling such complex systems. We evaluated the effectiveness of six different gear types (seine nets, boat electrofishers, hoop nets, Windermere traps, trap nets, and minnow traps) in sampling the fish assemblage at 30 sites in the shallow offshore waters of the middle Detroit River

  19. Lake Michigan Offshore Wind Feasibility Assessment

    SciTech Connect

    Boezaart, Arnold [GVSU; Edmonson, James [GVSU; Standridge, Charles [GVSU; Pervez, Nahid [GVSU; Desai, Neel [University of Michigan; Williams, Bruce [University of Delaware; Clark, Aaron [GVSU; Zeitler, David [GVSU; Kendall, Scott [GVSU; Biddanda, Bopi [GVSU; Steinman, Alan [GVSU; Klatt, Brian [Michigan State University; Gehring, J. L. [Michigan State University; Walter, K. [Michigan State University; Nordman, Erik E. [GVSU

    2014-06-30

    The purpose of this project was to conduct the first comprehensive offshore wind assessment over Lake Michigan and to advance the body of knowledge needed to support future commercial wind energy development on the Great Lakes. The project involved evaluation and selection of emerging wind measurement technology and the permitting, installation and operation of the first mid-lake wind assessment meteorological (MET) facilities in Michigan’s Great Lakes. In addition, the project provided the first opportunity to deploy and field test floating LIDAR and Laser Wind Sensor (LWS) technology, and important research related equipment key to the sitting and permitting of future offshore wind energy development in accordance with public participation guidelines established by the Michigan Great Lakes Wind Council (GLOW). The project created opportunities for public dialogue and community education about offshore wind resource management and continued the dialogue to foster Great Lake wind resource utilization consistent with the focus of the GLOW Council. The technology proved to be effective, affordable, mobile, and the methods of data measurement accurate. The public benefited from a substantial increase in knowledge of the wind resources over Lake Michigan and gained insights about the potential environmental impacts of offshore wind turbine placements in the future. The unique first ever hub height wind resource assessment using LWS technology over water and development of related research data along with the permitting, sitting, and deployment of the WindSentinel MET buoy has captured public attention and has helped to increase awareness of the potential of future offshore wind energy development on the Great Lakes. Specifically, this project supported the acquisition and operation of a WindSentinel (WS) MET wind assessment buoy, and associated research for 549 days over multiple years at three locations on Lake Michigan. Four research objectives were defined for the project including to: 1) test and validate floating LIDAR technology; 2) collect and access offshore wind data; 3) detect and measure bird and bat activity over Lake Michigan; 4) conduct an over water sound propagation study; 5) prepare and offer a college course on offshore energy, and; 6) collect other environmental, bathometric, and atmospheric data. Desk-top research was performed to select anchorage sites and to secure permits to deploy the buoy. The project also collected and analyzed data essential to wind industry investment decision-making including: deploying highly mobile floating equipment to gather offshore wind data; correlating offshore wind data with conventional on-shore MET tower data; and performing studies that can contribute to the advancement and deployment of offshore wind technologies. Related activities included: • Siting, permitting, and deploying an offshore floating MET facility; • Validating the accuracy of floating LWS using near shoreline cup anemometer MET instruments; • Assessment of laser pulse technology (LIDAR) capability to establish hub height measurement of wind conditions at multiple locations on Lake Michigan; • Utilizing an extended-season (9-10 month) strategy to collect hub height wind data and weather conditions on Lake Michigan; • Investigation of technology best suited for wireless data transmission from distant offshore structures; • Conducting field-validated sound propagation study for a hypothetical offshore wind farm from shoreline locations; • Identifying the presence or absence of bird and bat species near wind assessment facilities; • Identifying the presence or absence of benthic and pelagic species near wind assessment facilities; All proposed project activities were completed with the following major findings: • Floating Laser Wind Sensors are capable of high quality measurement and recordings of wind resources. The WindSentinel presented no significant operational or statistical limitations in recording wind data technology at a at a high confidence level as compared to traditional an

  20. The Seabed Stability Zonation in Chinese Offshore

    NASA Astrophysics Data System (ADS)

    Du, J.

    2013-12-01

    There are abundant natural resources and energy in Chinese offshore continental shelf, and which should be the most development potential region now and in the future. But the seabed of Chinese offshore is often under the instable status caused by many factors which deeply affects the safety of marine development. Marine geohazards is an active one among the influence factors. The marine geohazards means the geological factors developed in the seabed surface and the strata below the seabed, such as fault, shallow gas, landslide, coastal erosion, buried river channel, sand wave and sand ridge, easily liquefied sand layer etc., which will cause damage to the human life and property. In this paper, the seabed stability were analyzed and divided it into five grades based on the marine geohazards evaluation result which made by fuzzy mathematic model. Firstly, by collecting the analyzing the marine geohazards which distributed on the seabed or under the seabed, the marine geohazards maps in Chinese offshore were made and the classification system of marine geohazards was established. Then, the evaluation index system of seabed stability was set which included the seismic peak acceleration, geomorphology, direct geohazards and restricted geohazards. And the weighted value of each indicator was calculated by using analytic hierarchy process. And, a group of appropriate number with normal distribution was selected to replace the membership grade function. Based on above, a fuzzy evaluation model for seabed stability is established. Using the maps of marine geohazards, geomorphology maps and seismic peak acceleration maps as data source, using the fuzzy matrix as calculated method, based on the principles of maximum membership grade of fuzzy mathematics, we get the evaluation result of Chinese offshore with 6' by 6' grid unit. The maximum membership grade should be taken as the stability level in each unit. Above all, the seabed stability of Chinese offshore is divided into five grades according to the maximum membership grade. In this paper, we defined 5 classes which respectively were basically stable, relatively stable, medium, relatively unstable and unstable. By using statistical analysis method, a stability zonation map of the Chinese offshore has been drawn based on the evaluation result of each unit. From the stability map, Chinese offshore seabed stability was divided into sixty sub-regions with 5 classes. And the unstable sub-regions were mainly located in the North-East of Liaodong Bay, north of Laizhou Bay, the shoal in north Jiangsu, north Taiwan offshore and around Nan'ao Islands of Guangdong. Most Chinese offshore seabed stability has been in the relatively stable status.

  1. Trophic connections in Lake Superior Part I: the offshore fish community

    USGS Publications Warehouse

    Gamble, A.E.; Hrabik, T.R.; Stockwell, J.D.; Yule, D.L.

    2011-01-01

    Detailed diet linkages within the offshore (> 80 m bathymetric depth) food web of Lake Superior are currently not well identified. We used analyses of fish stomach contents to create an empirically based food web model of the Lake Superior offshore fish community. Stomachs were collected seasonally (spring, summer, and fall) from nine offshore locations in 2005, using bottom and midwater trawls. In total, 2643 stomachs representing 12 fish species were examined. The predominant fish species collected were deepwater sculpin (Myoxocephalus thompsonii), siscowet (Salvelinus namaycush siscowet), kiyi (Coregonus kiyi), and cisco (Coregonus artedi). Mysis diluviana was the most common prey item, indicating that changes in Mysis abundance could have a profound impact on the entire offshore food web. Mysis was the primary diet item of deepwater sculpin (? 53% by mass) and kiyi (? 96% by mass) regardless of depth or season. The invasive Bythotrephes was an important diet component of the pelagic cisco in summer and fall. Deepwater sculpin were the primary diet item of siscowet (? 52% by mass), with coregonines appearing in the diet of larger (> 400 mm) siscowet. Non-metric multidimensional scaling analysis indicated that there were no statistically significant seasonal or site-specific differences in diets of deepwater sculpin, cisco, or kiyi. Site was the primary structuring factor in siscowet diets. Generally, in Lake Superior, the diet items of the dominant offshore species did not appear to be in danger from those types of major ecological shifts occurring in the lower Laurentian Great Lakes.

  2. Offshore oil gas trends in ROVs tooling

    SciTech Connect

    Jacobson, J.R. (Perry Tritech Inc., Jupiter, FL (United States))

    1994-04-01

    The ROVs that operate in today's offshore environment bear little or no resemblance to those which first began supporting the oil and gas work requirements less than 15 years ago. In that short span of time, an explosion of subsea technology has occurred, rendering older equipment obsolete and expanding subsea remote intervention capabilities beyond the horizon of intervention tasks originally envisioned. Today's offshore work ROVs employ the latest in robotics, fiver optics, acoustics, video, and computer technologies, and routinely achieve better than 90 percent operational availability. Leading offshore ROV operations companies have demonstrated less than 1 percent down-time over thousands of hours of operation. As the offshore oil and gas market evolves, the ever-expanding capabilities of the work ROV plays a major role in shaping the operational concepts employed in subsea oil and gas field exploration, development, and production. This paper explores the capabilities of available ROV systems in use offshore today, the economic trends driving ROV technology development, and the new trends in the employment of ROVs and their associated sensors and tooling systems.

  3. Federal Offshore Statistics, 1993. Leasing, exploration, production, and revenue as of December 31, 1993

    SciTech Connect

    Francois, D.K.

    1994-12-31

    This document contains statistical data on the following: federal offshore lands; offshore leasing activity and status; offshore development activity; offshore production of crude oil and natural gas; federal offshore oil and natural gas sales volume and royalties; revenue from federal offshore leases; disbursement of federal offshore revenue; reserves and resource estimates of offshore oil and natural gas; oil pollution in US and international waters; and international activities and marine minerals. A glossary is included.

  4. Genetic differentiation between inshore and offshore Atlantic cod (Gadus morhua)

    E-print Network

    Ruzzante, Daniel E.

    Genetic differentiation between inshore and offshore Atlantic cod (Gadus morhua) off Newfoundland, and Sally V. Goddard Abstract: The genetic difference between inshore overwintering Atlantic cod (Gadus morhua) from Trinity Bay, Newfoundland, and offshore overwintering cod from the Grand Bank region

  5. Strengthening America's Energy Security with Offshore Wind (Fact Sheet)

    SciTech Connect

    Not Available

    2012-02-01

    This fact sheet describes the current state of the offshore wind industry in the United States and the offshore wind research and development activities conducted the U.S. Department of Energy Wind and Water Power Program.

  6. Investigation on installation of offshore wind turbines

    NASA Astrophysics Data System (ADS)

    Wang, Wei; Bai, Yong

    2010-06-01

    Wind power has made rapid progress and should gain significance as an energy resource, given growing interest in renewable energy and clean energy. Offshore wind energy resources have attracted significant attention, as, compared with land-based wind energy resources, offshore wind energy resources are more promising candidates for development. Sea winds are generally stronger and more reliable and with improvements in technology, the sea has become a hot spot for new designs and installation methods for wind turbines. In the present paper, based on experience building offshore wind farms, recommended foundation styles have been examined. Furthermore, wave effects have been investigated. The split installation and overall installation have been illustrated. Methods appropriate when installing a small number of turbines as well as those useful when installing large numbers of turbines were analyzed. This investigation of installation methods for wind turbines should provide practical technical guidance for their installation.

  7. THE GULF OF MEXICO OFFSHORE AQUACULTURE CONSORTIUM1

    Microsoft Academic Search

    Christopher J. Bridger

    Marine aquaculture may be classified into four categories according to the degree of protection afforded to the operation by the site characteristics: land-based operations; coastal, protected aquaculture; coastal, exposed aquaculture; and, offshore aquaculture. Offshore operations have all the logistical challenges of both remote coastal and exposed aquaculture but at an escalated scale. In 1999, the Gulf of Mexico Offshore Aquaculture

  8. CHAPTER 4 ENGINEERING REQUIREMENTS & LOGISTIC ALLEVIATION FOR OFFSHORE AQUACULTURE1

    Microsoft Academic Search

    Christopher J. Bridger; Clifford A. Goudey

    Offshore aquaculture—operating out of the sight of land—will have the logistic requirements associated with near shore operations, plus a new set of issues associated with the higher energy of the site and increased distance from shore. The Gulf of Mexico Offshore Aquaculture Consortium has been confronted by these challenges and has developed a suite of components to manage offshore aquaculture

  9. Offshore Aquaculture: The Frontier of Redefining Oceanic Property

    Microsoft Academic Search

    Michael Skladany; Rebecca Clausen; Ben Belton

    2007-01-01

    Over the past decade, offshore aquaculture has gained significant momentum as a global and, in particular, a U.S. seafood development strategy. Issues surrounding property rights, environmental impacts, and the social desirability of offshore aquaculture are inadequately addressed by policymakers and aquaculture specialists. This review essay describes offshore aquaculture's place in the development of industrial fish farming and the policy issues

  10. 77 FR 63849 - National Offshore Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-17

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard...National Offshore Safety Advisory Committee...National Offshore Safety Advisory Committee...issues related to safety of operations...gas offshore industry. These meetings...Hobby Airport Hotel, 9100 Gulf Freeway...Department of Homeland Security'' and...

  11. 78 FR 18614 - National Offshore Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-27

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard...National Offshore Safety Advisory Committee...National Offshore Safety Advisory Committee...issues related to safety of operations...gas offshore industry. These meetings...Baronne Plaza Hotel, 201 Baronne...Department of Homeland Security'' and...

  12. Study on RMB offshore financial market of Hong Kong

    Microsoft Academic Search

    Hongliang Wang

    2011-01-01

    It is essential to develop RMB offshore financial market in the process of promoting RMB internationalization. Hong Kong becomes the perfect place for constructing RMB offshore financial market due to its natural geography, developed busi- ness, strong infrastructure, a perfect system and other advan- tages. At present, the basic architecture of RMB offshore finan- cial market in Hong Kong has

  13. ForPeerReview PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER

    E-print Network

    Firestone, Jeremy

    ForPeerReview PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER PROJECTS IN THE UNITED STATES Journal: Wind, Andrew; Minerals Management Service Keywords: offshore wind power, public opinion, social acceptancePeerReview 1 PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER PROJECTS IN THE UNITED STATES Jeremy Firestone*, Willett

  14. Assessment of Ports for Offshore Wind Development in the United States

    SciTech Connect

    Elkinton, Chris [DNV GL] [DNV GL; Blatiak, Alicia; Ameen, Hafsa

    2014-03-21

    As offshore wind energy develops in the United States, port facilities will become strategic hubs in the offshore wind farm supply chain because all plant and transport logistics must transit through these facilities. Therefore, these facilities must provide suitable infrastructure to meet the specific requirements of the offshore wind industry. As a result, it is crucial that federal and state policy-makers and port authorities take effective action to position ports in the offshore wind value chain to take best advantage of their economic potential. The U.S. Department of Energy tasked the independent consultancy GL Garrad Hassan (GL GH) with carrying out a review of the current capability of U.S. ports to support offshore wind project development and an assessment of the challenges and opportunities related to upgrading this capability to support the growth of as many as 54 gigawatts of offshore wind installed in U.S. waters by 2030. The GL GH report and the open-access web-based Ports Assessment Tool resulting from this study will aid decision-makers in making informed decisions regarding the choice of ports for specific offshore projects, and the types of investments that would be required to make individual port facilities suitable to serve offshore wind manufacturing, installation and/or operations. The offshore wind industry in the United States is still in its infancy and this study finds that additional port facilities capable of supporting offshore wind projects are needed to meet the anticipated project build-out by 2030; however, no significant barriers exist to prevent the development of such facilities. Furthermore, significant port capabilities are in place today with purpose-build port infrastructure currently being built. While there are currently no offshore wind farms operating in the United States, much of the infrastructure critical to the success of such projects does exist, albeit in the service of other industries. This conclusion is based on GL GH’s review of U.S. ports infrastructure and its readiness to support the development of proposed offshore wind projects in U.S. waters. Specific examples of facility costs and benefits are provided for five coastal regions (North Atlantic, South Atlantic, Gulf of Mexico, Great Lakes, and Pacific) around the country. GL GH began this study by identifying the logistical requirements of offshore wind ports to service offshore wind. This review was based on lessons learned through industry practice in Northern Europe. A web-based port readiness assessment tool was developed to allow a capability gap analysis to be conducted on existing port facilities based on the identified requirements. Cost models were added to the assessment tool, which allowed GL GH to estimate the total upgrade cost to a port over the period 2014-2030 based on a set of regional project build-out scenarios. Port fee information was gathered from each port allowing an estimate of the potential revenue to the port under this same set of scenarios. The comparison of these revenue and improvement cost figures provides an initial indication of the level of offshore wind port readiness. To facilitate a more in-depth infrastructure analysis, six ports from different geographic regions, with varied levels of interest and preparedness towards offshore wind, were evaluated by modeling a range of installation strategies and port use types to identify gaps in capability and potential opportunities for economic development. Commonalities, trends, and specific examples from these case studies are presented and provide a summary of the current state of offshore wind port readiness in the U.S. and also illustrate the direction some ports have chosen to take to prepare for offshore wind projects. For example, the land area required for wind turbine and foundation manufacturing is substantial, particularly due to the large size of offshore wind components. Also, the necessary bearing capacities of the quayside and storage area are typically greater for offshore wind components than for more conventiona

  15. Offshore Wind Turbines - Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine: Environmental Effects of Offshore Wind Energy Development

    Microsoft Academic Search

    Pamela M. Aker; Anthony M. Jones; Andrea E. Copping

    2010-01-01

    Deep C Wind, a consortium headed by the University of Maine will test the first U.S. offshore wind platforms in 2012. In advance of final siting and permitting of the test turbines off Monhegan Island, residents of the island off Maine require reassurance that the noise levels from the test turbines will not disturb them. Pacific Northwest National Laboratory, at

  16. United States Offshore Wind Resource Assessment

    NASA Astrophysics Data System (ADS)

    Schwartz, M.; Haymes, S.; Heimiller, D.

    2008-12-01

    The utilization of the offshore wind resource will be necessary if the United States is to meet the goal of having 20% of its electricity generated by wind power because many of the electrical load centers in the country are located along the coastlines. The United States Department of Energy, through its National Renewable Energy Laboratory (NREL), has supported an ongoing project to assess the wind resource for the offshore regions of the contiguous United States including the Great Lakes. Final offshore maps with a horizontal resolution of 200 meters (m) have been completed for Texas, Louisiana, Georgia, northern New England, and the Great Lakes. The ocean wind resource maps extend from the coastline to 50 nautical miles (nm) offshore. The Great Lake maps show the resource for all of the individual lakes. These maps depict the wind resource at 50 m above the water as classes of wind power density. Class 1 represents the lowest available wind resource, while Class 7 is the highest resource. Areas with Class 5 and higher wind resource can be economical for offshore project development. As offshore wind turbine technology improves, areas with Class 4 and higher resource should become economically viable. The wind resource maps are generated using output from a modified numerical weather prediction model combined with a wind flow model. The preliminary modeling is performed by AWS Truewind under subcontract to NREL. The preliminary model estimates are sent to NREL to be validated. NREL validates the preliminary estimates by comparing 50 m model data to available measurements that are extrapolated to 50 m. The validation results are used to modify the preliminary map and produce the final resource map. The sources of offshore wind measurement data include buoys, automated stations, lighthouses, and satellite- derived ocean wind speed data. The wind electric potential is represented as Megawatts (MW) of potential installed capacity and is based on the square kilometers (sq. km) of Class 5 and higher wind resource found in a specific region. NREL uses a factor of 5 MW of installed capacity per sq. km of "windy water" for its raw electric potential calculations. NREL uses Geographic Information System data to break down the offshore wind potential by state, water depth, and distance from shore. The wind potential estimates are based on the updated maps, and on previous offshore resource information for regions where new maps are not available. The estimates are updated as new maps are completed. For example, the updated Texas offshore map shows almost 3000 sq. km of Class 5 resource within 10 nm of shore and nearly 2000 sq. km of Class 5 resource or 10,000 MW of potential installed capacity in water depths of less than 30 m. NREL plans to develop exclusion criteria to further refine the offshore wind potential

  17. Ice island creation, drift, recurrences, mechanical properties, and interactions with arctic offshore oil production structures. Final report

    SciTech Connect

    Sackinger, W.M.; Jeffries, M.O.; Li, Fucheng; Lu, Mingchi

    1991-03-01

    Research and engineering studies on first-year sea ice for over two decades has resulted in the design, construction, and operation of jacket platforms, of artificial islands, and of massive gravity structures which routinely withstand moving sea ice of thickness up to 2 meters. However, the less-common interactions between such structures and moving multiyear ice ({ge}3 meters thick), and also moving ice islands (10 to 60 meters thick) remain as the unknown and potentially most serious hazard for Arctic offshore structures. In this study, research was addressed across the complete span of remaining questions regarding such features. Ice island components, thickness distributions, scenarios and models for the interactions of massive ice features with offshore structures, all were considered. Ice island morphology and calving studies were directed at the cluster of 19 ice islands produced in a calving from the Ward Hunt Ice Shelf on Ellesmere Island in 1983, and also at a calving from the Milne Ice Shelf in 1988. The statistics of ice island dynamics, on both a short-term small-scale basis and also on a long-term basis, were studied. Typical wind velocities of 5 to 7.5 meters per second led to ice island speeds of about 0.014 of the wind speed, at an angle of 20{degrees} to the right of the wind direction. Ice island samples were tested for their stress/strain characteristics. Compressive strength values ranged from 1.64 MPa at a strain rate of 2 {times} 10{sup {minus}7} s{sup {minus}1} to 6.75 MPa at a strain rate of 1 {times} 10{sup {minus}3} s{sup {minus}1}. Scenarios for ice island/structure interactions were developed, and protective countermeasures such as spray ice and ice rubble barriers were suggested. Additional computer modeling of structure/ice interactions for massive ice features is recommended.

  18. Competitive Bidding for Offshore Petroleum Leases

    Microsoft Academic Search

    Douglas K. Reece

    1978-01-01

    This paper develops a formal model of competitive bidding to analyze some aspects of the federal offshore oil leasing system. The lease sales of interest are often characterized by small numbers of auction participants and by high levels of uncertainty regarding the true values of the leases offered. The model suggests that these circumstances may lead to the capture of

  19. CHOOSING OFFSHORE PIPELINE ROUTES: PROBLEMS AND SOLUTIONS

    EPA Science Inventory

    The report discusses the environmental and fisheries problems associated with offshore pipelines. The report focuses on how these problems can be addressed during the pipeline planning and route selection process. Geologic hazards are highlighted as the major factors related to p...

  20. MFR PAPER 1179 Offshore Headboat Fishing in

    E-print Network

    MFR PAPER 1179 Offshore Headboat Fishing in North Carolina and South Carolina GENE R. HUNTSMAN ABSTRACT-Headboats operating on the outer Continental Shelf of North Carolina and South Carolina made Carolina and South Carolina1 . Despite the northerly latitude of this fishery, it produces large catches

  1. Sea Stars Underwater Offshore Northern California

    USGS Multimedia Gallery

    Three sea stars on a rock, surrounded by a sandy seafloor littered with broken shells. Each sea star is approx. 10 - 15 cm (4-6 inches) across. Image acquired 4.5 km (3 miles) offshore Pigeon Point, southern San Mateo County, California at a depth of 52 meters....

  2. Fish Swimming Underwater Offshore Northern California

    USGS Multimedia Gallery

    A kelp greenling fish swimming above a seafloor of mixed gravel, cobble and rock outcrop with scattered shell. Fish is approx. 20 cm (8 inches) long. Image acquired 1 km (0.62 miles) offshore Half Moon Bay, California at a depth of 14 meters (46 ft). Also in the image are encrusting sponge...

  3. Offshore mussel aquaculture: new or just renewed?

    Microsoft Academic Search

    T. Lado-Insua; F. J. Ocampo; K. Moran

    2009-01-01

    The increase on the demand for marine products and the decrease of the wild marine population has led to the culturing of several marine species. Within the molluscs the mussel is the second largest product by volume of marine aquaculture. Mussels are an ideal species for culture in the open ocean, referred to as offshore aquaculture. Several different systems are

  4. Offshore Wind Power Farm Environmental Impact Assessment

    E-print Network

    Horns Rev Offshore Wind Power Farm Environmental Impact Assessment on Water Quality #12;Prepared Design ApS 04.05.2000 #12;Bio/consult Side 3 Horns Rev. Environmental Impact Assessment. Water Quality ................................................................................................................................. 12 4.2. WATER QUALITY

  5. Offshore Investments by Colleges Draw Scrutiny

    ERIC Educational Resources Information Center

    Fain, Paul; Wolverton, Brad

    2007-01-01

    Billions of dollars in untaxed, offshore investments by college endowments could be subject to taxation under a proposal being considered by the leaders of the U.S. Senate Finance Committee. The proposed change, which targets hedge funds, a popular investing strategy for many colleges, would affect the largest college endowments, including those…

  6. Gladden Pull-Apart Basin, offshore Belize

    Microsoft Academic Search

    Morrice

    1993-01-01

    The junction of the American and Caribbean plates in Belize has created a complex structural setting for oil and gas exploration. Recent seismic offshore Belize has been used to identify three structural provinces, from west to east: a shallow thrust zone, a narrow upthrown wrench faulted zone and a deeper extensional basin, named the Gladden Pull-Apart Basin. Hydrocarbon leakage from

  7. Accord near for offshore California oil shipments

    SciTech Connect

    Not Available

    1993-02-15

    There are faint glimmers of hope again for offshore California operators. After more than a decade of often bitter strife over offshore oil and gas development and transportation issues, state officials and oil producers may be moving toward compromise solutions. One such solution may be forthcoming on offshore development. But the real change came with the turnabout of the California Coastal Commission (CCC), which last month approved a permit for interim tankering of crude from Point Arguello oil field in the Santa Barbara Channel to Los Angeles. The dispute over how to ship offshore California crude to market has dragged on since before Point Arguelo development plans were unveiled. The project's status has become a flashpoint in the U.S. debate over resource use and environmental concerns. The controversy flared anew in the wake of the 1989 Exxon Valdez tanker spill off Alaska, when CCC voided a Santa Barbara County permit for interim tankering, a move project operator Chevron Corp. linked to the Exxon Valdez accident. Faced with litigation, the state's economic devastation, and acrimonious debate over transporting California crude, Gov. Pete Wilson and other agencies approved the CCC permit. But there's a catch: A permanent pipeline must be built to handle full production within 3 years. The paper discusses permit concerns, the turnaround decision, the anger of environmental groups, and pipeline proposals.

  8. Human Rights, Academic Freedom, and Offshore Academics

    ERIC Educational Resources Information Center

    Ross, Andrew

    2011-01-01

    Despite the carnage wrought on higher education by the Great Recession, evidence persists that the sector is still host to a speculator psychology. One example is the unabated stampede to set up branches and programs overseas. Colleges have many reasons to go offshore: (1) to reduce costs; (2) to build their "brands" in "emerging markets"; and (3)…

  9. Highwave off-shore energy hose

    Microsoft Academic Search

    Gary Ross; A. Michael Weaver; Chris O'Connor

    2011-01-01

    Many inshore wave energy collectors (WEC) concepts use wave energy to push water ashore to process it for energy conversion with turbines. An artificial reef design of floating HPDE pipe can be built in a harbor and installed offshore of the breaking waves in the near shore. The portable reef designed to mitigate shore erosion can serve as the shuttle

  10. Planning and evaluation parameters for offshore complexes

    NASA Technical Reports Server (NTRS)

    Sincoff, M. Z. (editor); Dajani, J. S. (editor)

    1976-01-01

    Issues are presented for consideration in the planning and design of offshore artificial complexes. The construction of such complexes, their social, economic, and ecological impacts, and the legal-political-institutional environments within which their development could occur, are discussed. Planning, design, and construction of near-shore complexes located off the Mid-Atlantic coast of the United States is emphasized.

  11. Rocky and Sandy Seafloor Offshore California

    USGS Multimedia Gallery

    Image of ripples in sand, next to a rocky surface on the seafloor 2.5 km (1.5 miles) offshore San Mateo County, California at a depth of 24.6 meters (81 feet). The two red dots in the image (from lasers mounted on the camera and used as reference points) are 15 cm (6 inches) apa...

  12. Cut drydocking costs for offshore rigs

    SciTech Connect

    Albaugh, E.K.

    1985-07-01

    Heavy-lift transport vessels (HLVs) can provide an economic alternative to the conventional shipyard approach of drydocking mobile offshore rigs for regulatory body inspections and/or repairs. Contractors now can drydock rigs in areas of the world where conventional drydocks are unavailable. This article discusses pros and cons of conventional shipyard drydocking and the HLV approach.

  13. Hydrocarbon potential of offshore South Florida basin

    Microsoft Academic Search

    B. M. Faulkner; A. V. Applegate

    1986-01-01

    The results of an extensive, detailed geologic and geophysical evaluation of the offshore South Florida basin show this area to have considerable hydrocarbon exploration potential. Geophysical mapping on six key horizons identified numerous structural closures at Dollar Bay through Bone Island mapping levels. Geologic evaluation indicated at least four viable potential reservoir horizons, including the Sunniland formation - the main

  14. Multiple Offshore Bars and Standing Waves

    Microsoft Academic Search

    Andrew D. Short

    1975-01-01

    Field measurements of multiple offshore bar spacing were compared to theory and wave measurements to corroborate the suggestion that bar formation and spacing are controlled by standing waves in the infragravity range (0.5-5 min). Theoretical and experimental studies predict the reflection of progressive waves from a shoreline as standing waves. Associated drift in the bottom boundary layer is expected to

  15. Final Report DE-EE0005380: Assessment of Offshore Wind Farm Effects on Sea Surface, Subsurface and Airborne Electronic Systems

    SciTech Connect

    Ling, Hao [The University of Texas at Austin] [The University of Texas at Austin; Hamilton, Mark F. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Bhalla, Rajan [Science Applications International Corporation] [Science Applications International Corporation; Brown, Walter E. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Hay, Todd A. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Whitelonis, Nicholas J. [The University of Texas at Austin] [The University of Texas at Austin; Yang, Shang-Te [The University of Texas at Austin] [The University of Texas at Austin; Naqvi, Aale R. [The University of Texas at Austin] [The University of Texas at Austin

    2013-09-30

    Offshore wind energy is a valuable resource that can provide a significant boost to the US renewable energy portfolio. A current constraint to the development of offshore wind farms is the potential for interference to be caused by large wind farms on existing electronic and acoustical equipment such as radar and sonar systems for surveillance, navigation and communications. The US Department of Energy funded this study as an objective assessment of possible interference to various types of equipment operating in the marine environment where offshore wind farms could be installed. The objective of this project was to conduct a baseline evaluation of electromagnetic and acoustical challenges to sea surface, subsurface and airborne electronic systems presented by offshore wind farms. To accomplish this goal, the following tasks were carried out: (1) survey electronic systems that can potentially be impacted by large offshore wind farms, and identify impact assessment studies and research and development activities both within and outside the US, (2) engage key stakeholders to identify their possible concerns and operating requirements, (3) conduct first-principle modeling on the interactions of electromagnetic signals with, and the radiation of underwater acoustic signals from, offshore wind farms to evaluate the effect of such interactions on electronic systems, and (4) provide impact assessments, recommend mitigation methods, prioritize future research directions, and disseminate project findings. This report provides a detailed description of the methodologies used to carry out the study, key findings of the study, and a list of recommendations derived based the findings.

  16. Mapping Seabird Sensitivity to Offshore Wind Farms

    PubMed Central

    Bradbury, Gareth; Trinder, Mark; Furness, Bob; Banks, Alex N.; Caldow, Richard W. G.; Hume, Duncan

    2014-01-01

    We present a Geographic Information System (GIS) tool, SeaMaST (Seabird Mapping and Sensitivity Tool), to provide evidence on the use of sea areas by seabirds and inshore waterbirds in English territorial waters, mapping their relative sensitivity to offshore wind farms. SeaMaST is a freely available evidence source for use by all connected to the offshore wind industry and will assist statutory agencies in assessing potential risks to seabird populations from planned developments. Data were compiled from offshore boat and aerial observer surveys spanning the period 1979–2012. The data were analysed using distance analysis and Density Surface Modelling to produce predicted bird densities across a grid covering English territorial waters at a resolution of 3 km×3 km. Coefficients of Variation were estimated for each grid cell density, as an indication of confidence in predictions. Offshore wind farm sensitivity scores were compiled for seabird species using English territorial waters. The comparative risks to each species of collision with turbines and displacement from operational turbines were reviewed and scored separately, and the scores were multiplied by the bird density estimates to produce relative sensitivity maps. The sensitivity maps reflected well the amassed distributions of the most sensitive species. SeaMaST is an important new tool for assessing potential impacts on seabird populations from offshore development at a time when multiple large areas of development are proposed which overlap with many seabird species’ ranges. It will inform marine spatial planning as well as identifying priority areas of sea usage by marine birds. Example SeaMaST outputs are presented. PMID:25210739

  17. Mapping seabird sensitivity to offshore wind farms.

    PubMed

    Bradbury, Gareth; Trinder, Mark; Furness, Bob; Banks, Alex N; Caldow, Richard W G; Hume, Duncan

    2014-01-01

    We present a Geographic Information System (GIS) tool, SeaMaST (Seabird Mapping and Sensitivity Tool), to provide evidence on the use of sea areas by seabirds and inshore waterbirds in English territorial waters, mapping their relative sensitivity to offshore wind farms. SeaMaST is a freely available evidence source for use by all connected to the offshore wind industry and will assist statutory agencies in assessing potential risks to seabird populations from planned developments. Data were compiled from offshore boat and aerial observer surveys spanning the period 1979-2012. The data were analysed using distance analysis and Density Surface Modelling to produce predicted bird densities across a grid covering English territorial waters at a resolution of 3 km×3 km. Coefficients of Variation were estimated for each grid cell density, as an indication of confidence in predictions. Offshore wind farm sensitivity scores were compiled for seabird species using English territorial waters. The comparative risks to each species of collision with turbines and displacement from operational turbines were reviewed and scored separately, and the scores were multiplied by the bird density estimates to produce relative sensitivity maps. The sensitivity maps reflected well the amassed distributions of the most sensitive species. SeaMaST is an important new tool for assessing potential impacts on seabird populations from offshore development at a time when multiple large areas of development are proposed which overlap with many seabird species' ranges. It will inform marine spatial planning as well as identifying priority areas of sea usage by marine birds. Example SeaMaST outputs are presented. PMID:25210739

  18. Inconsistency in 9 mm bullets: correlation of jacket thickness to post-impact geometry measured with non-destructive X-ray computed tomography.

    PubMed

    Thornby, John; Landheer, Dirk; Williams, Tim; Barnes-Warden, Jane; Fenne, Paul; Norman, Daniel; Attridge, Alex; Williams, Mark A

    2014-01-01

    Fundamental to any ballistic armour standard is the reference projectile to be defeated. Typically, for certification purposes, a consistent and symmetrical bullet geometry is assumed, however variations in bullet jacket dimensions can have far reaching consequences. Traditionally, characteristics and internal dimensions have been analysed by physically sectioning bullets--an approach which is of restricted scope and which precludes subsequent ballistic assessment. The use of a non-destructive X-ray computed tomography (CT) method has been demonstrated and validated (Kumar et al., 2011 [15]); the authors now apply this technique to correlate bullet impact response with jacket thickness variations. A set of 20 bullets (9 mm DM11) were selected for comparison and an image-based analysis method was employed to map jacket thickness and determine the centre of gravity of each specimen. Both intra- and inter-bullet variations were investigated, with thickness variations of the order of 200 ?m commonly found along the length of all bullets and angular variations of up to 50 ?m in some. The bullets were subsequently impacted against a rigid flat plate under controlled conditions (observed on a high-speed video camera) and the resulting deformed projectiles were re-analysed. The results of the experiments demonstrate a marked difference in ballistic performance between bullets from different manufacturers and an asymmetric thinning of the jacket is observed in regions of pre-impact weakness. The conclusions are relevant for future soft armour standards and provide important quantitative data for numerical model correlation and development. The implications of the findings of the work on the reliability and repeatability of the industry standard V50 ballistic test are also discussed. PMID:24378310

  19. Life Jacket Wear / Wearing Your Life Jacket

    MedlinePLUS

    ... thin and flexible. Some are built right into fishing vests or hunter coats. Others are inflatable — as ... into freezing water. When thrown off balance while fishing. When unable to swim because of heavy or ...

  20. Numerical Study Of The Effects Of Preloading, Axial Loading And Concrete Shrinkage On Reinforced Concrete Elements Strengthened By Concrete Layers And Jackets

    NASA Astrophysics Data System (ADS)

    Lampropoulos, A. P.; Dritsos, S. E.

    2008-07-01

    In this study, the technique of seismic strengthening existing reinforced concrete columns and beams using additional concrete layers and jackets is examined. The finite element method and the finite element program ATENA is used in this investigation. When a reinforced jacket or layer is being constructed around a column it is already preloaded due to existing service loads. This effect has been examined for different values of the axial load normalized to the strengthened column. The techniques of strengthening with a concrete jacket or a reinforced concrete layer on the compressive side of the column are examined. Another phenomenon that is examined in this study is the shrinkage of the new concrete of an additional layer used to strengthen an existing member. For this investigation, a simply supported beam with an additional reinforced concrete layer on the tensile side is examined. The results demonstrate that the effect of preloading is important when a reinforced concrete layer is being used with shear connectors between the old and the new reinforcement. It was also found that the shrinkage of the new concrete reduces the strength of the strengthened beam and induces an initial sliding between the old and the new concrete.

  1. Numerical Study Of The Effects Of Preloading, Axial Loading And Concrete Shrinkage On Reinforced Concrete Elements Strengthened By Concrete Layers And Jackets

    SciTech Connect

    Lampropoulos, A. P. [Civil Engineer, M.Sc., Department of Civil Engineering, University of Patras, Patras (Greece); Dritsos, S. E. [Professor, Department of Civil Engineering, University of Patras, 26500, Patras (Greece)

    2008-07-08

    In this study, the technique of seismic strengthening existing reinforced concrete columns and beams using additional concrete layers and jackets is examined. The finite element method and the finite element program ATENA is used in this investigation. When a reinforced jacket or layer is being constructed around a column it is already preloaded due to existing service loads. This effect has been examined for different values of the axial load normalized to the strengthened column. The techniques of strengthening with a concrete jacket or a reinforced concrete layer on the compressive side of the column are examined. Another phenomenon that is examined in this study is the shrinkage of the new concrete of an additional layer used to strengthen an existing member. For this investigation, a simply supported beam with an additional reinforced concrete layer on the tensile side is examined. The results demonstrate that the effect of preloading is important when a reinforced concrete layer is being used with shear connectors between the old and the new reinforcement. It was also found that the shrinkage of the new concrete reduces the strength of the strengthened beam and induces an initial sliding between the old and the new concrete.

  2. Old Issues in a New Jacket: Power and Validation in the Context of Mixture Modeling

    ERIC Educational Resources Information Center

    Lubke, Gitta

    2012-01-01

    Von Davier et al. (this issue) describe two analyses that aim at determining whether the constructs measured with a number of observed items are categorical or continuous in nature. The issue of types versus traits has a long history and is relevant in many areas of behavioral research, including personality research, as emphasized by von Davier…

  3. Using rainwear as switching jackets. A reasonable solution for electric arc exposure

    Microsoft Academic Search

    E. Hoagland

    1997-01-01

    LG&E has tested numerous types of clothing for worker protection under electric arc exposure situations and discusses the test methods used along with practical application of the ATPY (arc thermal protective value) and HAF (heat attenuation factor) results which are being reported by manufacturers of flame retardant (FR) clothing. This article focuses on the newly discovered and documented feasibility of

  4. Using rainwear as switching jackets: a reasonable solution for electric arc exposure

    Microsoft Academic Search

    Hugh Hoagland; Bill Morrow

    2000-01-01

    Louisville Gas and Electric, Louisville, KY, USA, has tested numerous types of clothing for worker protection under electric arc exposure situations and discusses the test methods used, along with practical application of the arc thermal protective value and heat attenuation factor results which are being reported by manufacturers of arc-resistant clothing. This paper focuses on the newly discovered and documented

  5. Some Effects of Injection Advance Angle, Engine-Jacket Temperature, and Speed on Combustion in a Compression-Ignition Engine

    NASA Technical Reports Server (NTRS)

    Rothrock, A M; Waldron, C D

    1936-01-01

    An optical indicator and a high-speed motion-picture camera capable of operating at the rate of 2,000 frames per second were used to record simultaneously the pressure development and the flame formation in the combustion chamber of the NACA combustion apparatus. Tests were made at engine speeds of 570 and 1,500 r.p.m. The engine-jacket temperature was varied from 100 degrees to 300 degrees F. And the injection advance angle from 13 degrees after top center to 120 degrees before top center. The results show that the course of the combustion is largely controlled by the temperature and pressure of the air in the chamber from the time the fuel is injected until the time at which combustion starts and by the ignition lag. The conclusion is presented that in a compression-ignition engine with a quiescent combustion chamber the ignition lag should be the longest that can be used without excessive rates of pressure rise; any further shortening of the ignition lag decreased the effective combustion of the engine.

  6. Spacecraft attitude impacts on COLD-SAT non-vacuum jacketed LH2 supply tank thermal performance

    NASA Technical Reports Server (NTRS)

    Arif, Hugh

    1990-01-01

    The Cryogenic On-Orbit Liquid Depot - Storage, Acquisition and Transfer (COLD-SAT) spacecraft will be launched into low earth orbit to perform fluid management experiments on the behavior of subcritical liquid hydrogen (LH2). For determining the optimum on-orbit attitude for the COLD-SAT satellite, a comparative analytical study was performed to determine the thermal impacts of spacecraft attitude on the performance of the COLD-SAT non-vacuum jacketed LH2 supply tank. Tank thermal performance was quantitied by total conductive and radiative heat leakage into the pressure vessel due to the absorbed solar, earth albedo and infra-red on-orbit fluxes, and also by the uniformity of the variation of this leakage on the vessel surface area. Geometric and thermal analysis math models were developed for the spacecraft and the tank as part of this analysis, based on their individual thermal/structural designs. Two quasi-inertial spacecraft attitudes were investigated and their effects on the tank performance compared. The results are one of the criteria by which the spacecraft orientation in orbit was selected for the in-house NASA Lewis Research Center design.

  7. Spacecraft attitude impacts on COLD-SAT non-vacuum jacketed LH2 supply tank thermal performance

    NASA Technical Reports Server (NTRS)

    Arif, Hugh

    1990-01-01

    The Cryogenic On-Orbit Liquid Depot - Storage, Acquisition and Transfer (COLD-SAT) spacecraft will be launched into low earth orbit to perform fluid management experiments on the behavior of subcritical liquid hydrogen (LH2). For determining the optimum on-orbit attitude for the COLD-SAT satellite, a comparative analytical study was performed to determine the thermal impacts of spacecraft attitude on the performance of the COLD-SAT non-vacuum jacketed LH2 supply tank. Tank thermal performance was quantified by total conductive and radiative heat leakage into the pressure vessel due to the absorbed solar, earth albedo and infra-red on-orbit fluxes, and also by the uniformity of the variation of this leakage on the vessel surface area. Geometric and thermal analysis math models were developed for the spacecraft and the tank as part of this analysis, based on their individual thermal/structural designs. Two quasi-inertial spacecraft attitudes were investigated and their effects on the tank performance compared. The results are one of the criteria by which the spacecraft orientation in orbit was selected for the in-house NASA Lewis Research Center design.

  8. Wind/Wave Misalignment in the Loads Analysis of a Floating Offshore Wind Turbine: Preprint

    SciTech Connect

    Barj, L.; Stewart, S.; Stewart, G.; Lackner, M.; Jonkman, J.; Robertson, A.

    2014-02-01

    Wind resources far from the shore and in deeper seas have encouraged the offshore wind industry to look into floating platforms. The International Electrotechnical Commission (IEC) is developing a new technical specification for the design of floating offshore wind turbines that extends existing design standards for land-based and fixed-bottom offshore wind turbines. The work summarized in this paper supports the development of best practices and simulation requirements in the loads analysis of floating offshore wind turbines by examining the impact of wind/wave misalignment on the system loads under normal operation. Simulations of the OC3-Hywind floating offshore wind turbine system under a wide range of wind speeds, significant wave heights, peak-spectral periods and wind/wave misalignments have been carried out with the aero-servo-hydro-elastic tool FAST [4]. The extreme and fatigue loads have been calculated for all the simulations. The extreme and fatigue loading as a function of wind/wave misalignment have been represented as load roses and a directional binning sensitivity study has been carried out. This study focused on identifying the number and type of wind/wave misalignment simulations needed to accurately capture the extreme and fatigue loads of the system in all possible metocean conditions considered, and for a down-selected set identified as the generic US East Coast site. For this axisymmetric platform, perpendicular wind and waves play an important role in the support structure and including these cases in the design loads analysis can improve the estimation of extreme and fatigue loads. However, most structural locations see their highest extreme and fatigue loads with aligned wind and waves. These results are specific to the spar type platform, but it is expected that the results presented here will be similar to other floating platforms.

  9. Drilling tools for continuous offshore operations

    SciTech Connect

    Gelfgat, M.Y. [Aquatic Company, Ltd., Moscow (Russian Federation); Surkov, D.V.; Buyanovsky, I.N. [All-Russia Scientific Research Inst. of Drilling Techniques, Moscow (Russian Federation)

    1995-12-31

    Offshore drilling tools are still the object of improvement aimed in achieving maximum production or scientific effect of minimum costs. One of perspective ways of improving offshore scientific drilling indices is utilization of drilling systems which provide continuous hole penetration without pulling out the drill string aboard of drill vessel for bit replacement. The report presents specific features of the drilling tools supplying Complete Coring System (CCS) operations. CCS can provide continuous coring and drilling as well as logging in any geological profiles from the soft to very hard formations. One of the basic principles in coring is slimhole pilot drilling, thus giving many advantages. Development of drilling tools for CCS is based upon vast experience in designing drilling tools, including the retractable bits. In perspective CCS can be applied in stratigraphic and scientific drilling in deep water, especially in complicated geological conditions.

  10. New technology emphasizes international offshore effort

    SciTech Connect

    NONE

    1997-07-01

    While the offshore industry is focusing its major development efforts on the deeper waters of the US Gulf, West Africa and Brazil, technology has not stood still in the world`s many other established and frontier offshore development areas. These selected items drawn from contributions by UK companies and a major joint-venture development in Eastern Canada emphasize this effort. Included here are: (1) announcement of a major six-field, 3 Tcf gas development off Nova Scotia`s Sable Island and award of two drilling contracts; (2) a comprehensive study of mobile production units in the UK by Smith Rea Energy Analysts; (3) four applications of an option to high-pressure swivels on an FPSO with multiple subsea inlet lines; (4) a contract to supply a DC bus drive for 17 ESPs on Texaco`s Captain field; and (5) review of an environmental study of the Falkland Islands in preparation for exploration activity.

  11. Locating Microseism Sources in Offshore Southern California

    NASA Astrophysics Data System (ADS)

    Tian, X.; Clayton, R. W.

    2007-12-01

    We use the broadband stations from the S. California network to locate the apparent origin of secondary microseisms energy (5-8 Hz band). The procedure is to grid the offshore region and using each grid point as the source point, predict the response of a Rayleigh wave at each station. These predicted waveforms are then correlated with the data over a time window that is typically a 1/2 hour in length and composited at the grid point. The length of the time window controls a tradeoff between the spatial-temporal resolution of the sources and the robustness on the image. The procedure is valid for multiple sources. This results show that during periods of high microseism activity the sources are distinct at several locations in a region approximately 50-100 km offshore. For an 11/09/2002 Southern Ocean storm, for example, two zones parallel to each other and perpendicular to the coast are imaged.

  12. Perspectives of offshore geothermal energy in Italy

    NASA Astrophysics Data System (ADS)

    Armani, F. B.; Paltrinieri, D.

    2013-06-01

    Italy is the first European and world's fifth largest producer of geothermal energy for power generation which actually accounts for less than 2% of the total electricity production of the country. In this paper after a brief introduction to the basic elements of high-enthalpy geothermal systems, we discuss the potentialities represented by the submarine volcanoes of the South Tyrrhenian Sea. In particular we focus on Marsili Seamount which, according to the literature data, can be considered as a possible first offshore geothermal field; then we give a summary of the related exploitation pilot project that may lead to the realization of a 200MWe prototype power plant. Finally we discuss some economic aspects and the development perspectives of the offshore geothermal resource taking into account the Italian energy framework and Europe 2020 renewable energy target.

  13. The geotechnical centrifuge in offshore engineering

    SciTech Connect

    Murff, J.D.

    1996-12-31

    One of the greatest needs in offshore geotechnical engineering is for large scale test measurements on which to calibrate design procedures. The geotechnical centrifuge offers at least a partial remedy. Because it allows one to properly simulate stresses, it is a legitimate, relatively inexpensive option to full scale field testing. As such it is a valuable technique and can be an excellent complement to laboratory tests, 1-g model tests and numerical analyses. However, it has not been widely used by industry even though the capability has existed for almost thirty years. This paper argues that this technology should gain acceptance beyond the research community. The paper presents an overview of centrifuge principles, philosophies of use, and limitations of the technique. For illustration, several actual applications of centrifuge testing for complex offshore problems are described. Results are shown to provide important insights into prototype behavior and to agree well with full scale measurements where these are available.

  14. Offshore distributional patterns of Hawaiian fish larvae

    Microsoft Academic Search

    J. M. Leis; J. M. Miller

    1976-01-01

    An analysis of ichthyoplankton samples based on relative abundance reveals pronounced inshore\\/offshore distributional gradients for most Hawaiian fish larvae. Larvae of pelagic bay species are found almost exclusively in semi-enclosed bays and estuaries. Larvae of pelagic neritic species are more or less uniformly distributed with distance from shore. The larvae of reef species with non-pelagic eggs are most abundant close

  15. Arctic and offshore research: Technology status report

    SciTech Connect

    Not Available

    1988-01-01

    This report describes the state of technology relative to the production of oil and gas in the Arctic. It discusses the technical issues that warrant investigation, and focuses on the current Department of Energy supported activities. Major accomplishments during the last year include the following: The Arctic and Offshore Research Information System (AORIS) was planned with industry survey recommendations incorporated. It contains a directory of 85 Arctic databases, a bibliographic component of over 7,000 citations, and a data component of about 300 data sets on sea ice characteristics. Seven position, pressure, and temperature buoys were deployed on ice islands (up to 3 by 6 miles in size) drifting off Ellesmere Island. Ice island movement, as much as 340 miles southwest of the Ward Hunt Ice Shelf during the last 4 years, represents a potential hazard to Arctic offshore structures in the Alaskan Beaufort Sea. The redesigned Seafloor Earthquake Measurement System (SEMS II) was deployed near Shell's Ellen-Elly platforms, about 10 miles offshore of Long Beach, California. The SEMS monitored the July 1986 southern California earthquakes. This was the first time earthquakes were simultaneouslly monitored by sensors located on land, aboard offshore platforms, and beneath the seafloor. Sea spray ice bond shear strength to various structural and protective coatings has been determined. The polyethylene coating demonstrated the most potential for rapid shedding of spray ice by gravity loading. Measurements of temperatures and salinities were completed as part of a pilot test to (1) detect seasonal conditions at the water-seabed interface, and (2) determine how they influence permafrost growth in the coastal waters of the Beaufort Sea. The temperatures and computed freezing point data suggest that seasonal seabed freezing can occur most of the winter. 13 refs., 14 figs., 4 tabs.

  16. CATHODIC PROTECTION RETROFIT OF AN OFFSHORE PIPELINE

    Microsoft Academic Search

    Robert Winters; Alan Holk

    1997-01-01

    Cathodic protection (CP) anodes and corrosion coating on two offshore pipelines were damaged during deep water installation. In-situ methods for deep-water inspection and repair of the pipelines` CP and coating systems were developed and used. High-pressure natural gas Pipeline. A design was 5.6 miles of 8.625 in. OD by 0.406 in. W.T. API SL, Grade X-42, seamless line pipe. Pipeline

  17. Offshore production riser with flexible connector

    SciTech Connect

    Blomsma, E.C.; Holtslag, P.T.

    1981-06-16

    A central pipe riser support structure is connected to an underwater offshore base member by means of a gimbal joint. Vertical flow lines run parallel to the central riser and are supported by support means connected thereto. The lowermost support of each flow line is formed by a guide sleeve allowing at most a 3/sup 0/ deviation between the central axis of the guide sleeve and the central axis of the flow line.

  18. Designing Australia's North West Shelf offshore pipeline

    SciTech Connect

    Seymour, E.V.; Craze, D.J.; Ruinen, W.

    1984-05-07

    Design studies for the offshore pipeline system for the North West Shelf project in Australia commenced in the early 1970s. The trunkline from the North Rankin A platform to shore has recently been completed as the first part of the offshore pipeline system for the North West Shelf project. This pipeline originates from the platform in a water depth of 125 m (410 ft), enters the mouth of Mermaid Sound, and terminates just south of Withnell Bay on the Burrup Peninsula, on the North West coastline of Western Australia. The pipeline is 1,016 mm (40 in.) in diameter and 134.2 km (83.4 miles) long. It will operate in two-phase flow, bringing both gas and condensate to an onshore plant near its landfall. A slugcatcher has been constructed within the plant to receive liquidhydrocarbon slugs from the pipeline. The trunkline to shore will initially serve only the one offshore platform and operate at about 25% of its capacity to supply the Western Australian domestic gas market. The domestic gas plant on the Burrup Peninsula is being constructed by Woodside to produce pipeline-quality gas for delivery to the State Energy Commission and condensate for shipment by coastal tankers.

  19. Operating requirements for and historical operations of Arctic offshore drilling systems in the United States

    SciTech Connect

    Regg, J.; Breitmeier, J.; Walker, J. [Dept. of the Interior, Anchorage, Alaska (United States). Minerals Management Service

    1995-12-31

    Many of the floating and bottom-founded drilling structures used for oil and gas exploration in the US Arctic have recently been proposed for use in the Russian Arctic offshore. This paper describes the US Arctic environmental conditions in terms of operation capabilities for the various types of drilling systems. A brief description of the various types of drilling systems used to date in the US Arctic is provided as background information. Also presented are the special regulatory requirements and contingency plans which have been developed for offshore Arctic drilling-system operations. The paper will summarize information on the operating experiences of the various drilling systems used in the US Arctic Outer Continental Shelf (OCS) to date.

  20. Offshore oil & gas markets heating up: Gulf of Mexico rising from `Dead Sea` image; healthy Gulf, North Sea markets combine for big impact

    SciTech Connect

    Simmons, M.R.

    1995-09-01

    Only three years ago, Gulf of Mexico drilling activity was so moribund that it was termed the Dead Sea. But the market has changed so there is now effectively 100 percent utilization in several important categories of offshore rigs, and almost every type of offshore rig is now getting higher use and better rates. What makes these changes so profound is that few industry participants saw this tightness developing, and almost no one predicted that it would occur so soon. Even the largest offshore contractors were pleasantly surprised as they watched their key drilling markets tighten so uickly after many years of vast oversupply. Today, while neither the Gulf of Mexico nor the North Sea could be described as booming, they are not falling apart either. The combination of both markets merely being normal at the same time has made a big impact on the worldwide supply and demand for offshore drilling. The need for steady and increasing offshore oil and gas production has never been so high. The technology now in place is allowing the development of offshore areas deemed almost impossible less than a decade ago. Also, the vast excess supply of offshore equipment is gone for many forms of drilling, and the need for steadily higher dayrates is real and will merely increase over time.

  1. 46 CFR 108.520 - Type of survival craft.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Type of survival craft. 108.520 Section 108.520 ...OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.520 Type of survival craft. (a) Each lifeboat...

  2. 26th Annual offshore technology conference: 1994 Proceedings

    SciTech Connect

    Not Available

    1994-01-01

    This conference represents the world's largest and most comprehensive technical conference and exhibition on offshore resource development. The four proceedings volumes have been separated by major areas of interest with this volume containing papers relative to design of offshore platforms and marine riser systems. Papers deal with design, installation, fabrication, transport systems, mooring devices, repair methods, and development of satellite production facilities. Case histories on various offshore oil and gas fills are discussed along with economics of some applications and designs.

  3. Offshore Code Comparison Collaboration (OC3) for IEA Wind Task 23 Offshore Wind Technology and Deployment

    SciTech Connect

    Jonkman, J.; Musial, W.

    2010-12-01

    This final report for IEA Wind Task 23, Offshore Wind Energy Technology and Deployment, is made up of two separate reports, Subtask 1: Experience with Critical Deployment Issues and Subtask 2: Offshore Code Comparison Collaborative (OC3). Subtask 1 discusses ecological issues and regulation, electrical system integration, external conditions, and key conclusions for Subtask 1. Subtask 2 included here, is the larger of the two volumes and contains five chapters that cover background information and objectives of Subtask 2 and results from each of the four phases of the project.

  4. Operational Impacts of Large Deployments of Offshore Wind (Poster)

    SciTech Connect

    Ibanez, E.; Heaney, M.

    2014-10-01

    The potential operational impact of deploying 54 GW of offshore wind in the United States was examined. The capacity was not evenly distributed; instead, it was concentrated in regions with better wind quality and close to load centers (Table 1). A statistical analysis of offshore wind power time series was used to assess the effect on the power system. The behavior of offshore wind resembled that of onshore wind, despite the former presenting higher capacity factors, more consistent power output across seasons, and higher variability levels. Thus, methods developed to manage onshore wind variability can be extended and applied to offshore wind.

  5. Venezuela offshore oil and gas production development: Past, present and future

    SciTech Connect

    Perez La Salvia, H.; Schwartz, E.; Contreras, M.; Rodriguez, J.I.; Febres, G.; Gajardo, E.

    1995-12-01

    This paper presents a short history of offshore oil and gas production in Venezuela starting in Lake Maracaibo in 1923. The main emphasis has been the results of the recent R and D and the exploratory offshore programs in areas like Orinoco Delta located in the Atlantic Ocean, Northeast and Northwest Venezuela in the Caribbean sea. In the R and D offshore program the main objectives were: (1) To establish the local environmental, oceanographical, geotechnical and seismicity conditions for the Venezuelan Continental Platform. (2) To give a technical support to the PDVSA Operating Affiliates during the exploratory programs including: (a) to develop accurate drilling vessel positioning systems; (b) evaluation of sea bottom geotechnical conditions for safely operating the jack-ups and drilling vessels involved in the exploratory wells and (c) to identify those areas which because of their special nature require further investigation to establish preliminary type of platforms required for the areas to be developed or to evaluate other solutions proposed by Foreign Consultant Engineering Companies to the PDVSA Operating Affiliated Companies. The main objective of PDVSA for the coming future will be to develop the North of Paria Gas Field through the initially named Christopher Columbus Project now Sucre Gas, S.A., a consortium conformed by LaGoven, S.A. Shell, Exxon and Mitsubishi. objective of this paper is to give an idea of the history of the Venezuelan Oil and Gas Offshore development giving emphasis to the results of the INTEVEP S.A. Red offshore program and to show some results of the particular characteristics of oceanographical, environmental, geotechnical and seismic conditions in the main areas evaluated during the exploratory program: Orinoco Delta, Gulf of Paria and North of Paria.

  6. 77 FR 75187 - Notice of Determination of No Competitive Interest, Offshore Maine

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-19

    ...Determination of No Competitive Interest, Offshore Maine AGENCY: Bureau of Ocean Energy Management...Proposed Commercial Wind Lease Offshore Maine...Outer Continental Shelf (OCS) Offshore Maine, Request for Interest (RFI), that...

  7. 75 FR 29397 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-26

    ...Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling By the authority...Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the ``Commission...and mitigating the impact of, oil spills associated with offshore...

  8. 33 CFR 100.728 - Special Local Regulations; Hurricane Offshore Classic, St. Petersburg, FL.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... false Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...100.728 Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...All vessel traffic, not involved in the Hurricane Offshore Classic, entering...

  9. 33 CFR 100.728 - Special Local Regulations; Hurricane Offshore Classic, St. Petersburg, FL.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... false Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...100.728 Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...All vessel traffic, not involved in the Hurricane Offshore Classic, entering...

  10. 33 CFR 100.728 - Special Local Regulations; Hurricane Offshore Classic, St. Petersburg, FL.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... false Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...100.728 Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...All vessel traffic, not involved in the Hurricane Offshore Classic, entering...

  11. 33 CFR 100.728 - Special Local Regulations; Hurricane Offshore Classic, St. Petersburg, FL.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... false Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...100.728 Special Local Regulations; Hurricane Offshore Classic, St. Petersburg...All vessel traffic, not involved in the Hurricane Offshore Classic, entering...

  12. Regional geologic framewowrk of the Norphlet formaion of the onshore and offshore Mississippi, Alabama, and Florida area

    Microsoft Academic Search

    R. M. Mink; B. L. Bearden; E. A. Mancini

    1988-01-01

    Numerous hydrocarbon accumulations have been discovered in the Norphlet Formation in the onshore and offshore Mississippi, Alabama, and Florida area. Petroleum traps are salt anticlines, faulted salt anticlines and extensional faults associated with halokinetics. Reservoirs include eolian dune, interdune, wadi and marine sandstones. Source rocks for the Norphlet hydrocarbons are Smackover carbonate mudstones. Hydrocarbon types are oil, condensate, and natural

  13. Seismic no-data zone, offshore Mississippi delta: depositional controls on geotechnical properties, velocity structure, and seismic attenuation

    SciTech Connect

    May, J.A.; Meeder, C.A.; Tinkle, A.R.; Wener, K.R.

    1986-09-01

    Seismic acquisition problems plague exploration and production offshore the Mississippi delta. Geologic and geotechnical analyses of 300-ft borings and 20-ft piston cores, combined with subbottom acoustic measurements, help identify and predict the locations, types, and magnitudes of anomalous seismic zones. This knowledge is used to design acquisition and processing techniques to circumvent the seismic problems.

  14. Offshore Wind Turbines - Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine: Environmental Effects of Offshore Wind Energy Development

    SciTech Connect

    Aker, Pamela M.; Jones, Anthony M.; Copping, Andrea E.

    2010-11-23

    Deep C Wind, a consortium headed by the University of Maine will test the first U.S. offshore wind platforms in 2012. In advance of final siting and permitting of the test turbines off Monhegan Island, residents of the island off Maine require reassurance that the noise levels from the test turbines will not disturb them. Pacific Northwest National Laboratory, at the request of the University of Maine, and with the support of the U.S. Department of Energy Wind Program, modeled the acoustic output of the planned test turbines.

  15. Proceedings of the 25th annual offshore technology conference. Volume 1: Geology, earth sciences and environment

    SciTech Connect

    Not Available

    1993-01-01

    This conference proceedings represents volume 1 of a 4 volume conference relating to offshore operations in both energy and non-energy fields of resource development. This volume discusses the use of geophysical surveying techniques and equipment for mapping the seafloor; the design and use of offshore platforms; safety engineering systems; interpretation techniques for offshore survey data; environmental impacts from offshore operations; geology of offshore areas; and regulations pertaining to the development of offshore resources.

  16. The offshore-ring: A new system design for the open ocean aquaculture of macroalgae

    Microsoft Academic Search

    Bela Hieronymus Buck; Cornelia Maria Buchholz

    2004-01-01

    Mass culture of benthic macroalgae under rough offshore conditions in the North Sea requires rigid culture support systems that cannot only withstand rough weather conditions but can also be effectively handled while at the same time retain the cultured species. Various carrier constructions and different mooring systems were tested. Laminaria saccharina grew on all of these carriers with initially high

  17. BIO-OFFSHORE: Grootschalige teelt van zeewieren in combinatie met offshore windparken in de Noordzee

    Microsoft Academic Search

    E. H. Reith; E. P. Deurwaarder; K. Hemmes; A. P. W. M. Curvers; P. Kamermans; W. A. Brandenburg; G. Lettings

    2005-01-01

    This study addresses the technological feasibility of seaweed cultivation in the North Sea in combination with offshore wind parks and harvesting and conversion of seaweed biomass to renewable energy carriers and chemicals. The study also identifies stakeholders and participants for technology development and the ecological and societal conditions to fit in large-scale seaweed cultivation in the marine environment, existing marine

  18. About Hercules Offshore Headquartered in Houston, Texas, Hercules Offshore serves the oil and

    E-print Network

    Fisher, Kathleen

    provides shallow-water drilling and support services to the oil and gas industry. The company serves national oil and gas companies, major integrated energy companies and natural gas operators. Shallow-water, Hercules Offshore was faced with a need to upgrade. The company had customized the original Oracle

  19. Arctic and offshore research. Technology status report

    SciTech Connect

    Not Available

    1984-10-01

    The DOE Arctic and Offshore Research (AOR) effort is designed to meet the needs for a centralized, high-quality, Arctic energy-related data base and for long-term, high-risk research. The ultimate purpose of the DOE effort is to promote extensive private use of the evolving AOR technology data base in order to accelerate development of Arctic oil and gas resources. In assessing the Arctic energy-related research needs as delineated in this report, the Morgantown Energy Technology Center (METC), with the DOE Fossil Energy Office of Oil, Gas, and Shale Technology, developed the following activities: AOR Energy-Related Technology Data Base Development; AOR Seminars and Workshops; Arctic and Offshore Energy Research Coordination; Sea Ice Research; Seafloor/Soils Research; and Subice Systems Development. The DOE AOR effort was initiated in FY 1983, the early development activities were performed in January and February 1983, and the effort evolved to its present form by the conclusion of FY 1984. The current activities have included determining the Arctic bibliographic data base and initiating most pieces of the research described above (except multiyear ice properties and pipeline research). Some of the FY 1984 major accomplishments are: four to five ice islands 1 to 2 miles in length drifting off the Ellesmere ice shelves north of Ellesmere Island were aerially surveyed. A report was completed on the location of the ice shelf edge, breakup, and regrowth of the Ellesmere ice shelves over the past two decades. Ice-ridging shear zone studies have shown that the 6- to 10-feet high shoals usually under the shear zone are not totally destroyed from ice gouging from one year to the next, but that the ice gouging may be instrumental in initiating and maintaining the shoals, which may protect Arctic offshore structures. Airborne radar sensing techniques were used to determine the electromagnetic properties of sea ice and physical properties.

  20. Cathodic protection retrofit of an offshore pipeline

    SciTech Connect

    Winters, R.H.; Holk, A.C. [Tenneco Energy, Houston, TX (United States)

    1997-09-01

    Cathodic protection (CP) anodes and corrosion coating on two offshore pipelines were damaged during deep water installation. In-situ methods for deep-water inspection and repair of the pipelines` CP and coating systems were developed and used. High-pressure natural gas Pipeline. A design was 5.6 miles of 8.625 in. OD by 0.406 in. W.T. API SL, Grade X-42, seamless line pipe. Pipeline B design was 0.3 miles of similar specification pipe. Both pipelines were mill-coated with 14 mil of fusion-bonded epoxy (FBE) corrosion coating. Girth welds were field-coated with FBE.

  1. Unified design equation for offshore cathodic protection

    SciTech Connect

    Townley, D.W. [Chevron Petroleum Technology Co., La Habra, CA (United States)

    1997-09-01

    A new approach (the Unified Design Equation) is proposed for the design of sacrificial anode cathodic protection systems for offshore structures. This method results in a single design equation which incorporates both long term maintenance current density requirements and the use of high initial current density to achieve rapid polarization. The Unified Design Equation is compared to current design practice, to suggest values for the parameters useful for areas and conditions where historical designs are known to perform well. Under conditions where experience is lacking (e.g., new geographic areas, deep water, etc.) the design parameters can be determined experimentally.

  2. Technology assessment of offshore industry and its impact on the maritime industry 1976-2000. Executive summary. Final report

    Microsoft Academic Search

    Durfee

    1977-01-01

    This report contains a 25 year forecast of the offshore industry including offshore petroleum production, offshore power production, offshore mining, offshore service platforms, and commercial ocean fishing. Each segment of the offshore industry is described in terms of the current status of industry, trends that might influence the direction of future development, and forces acting on the industry to impede

  3. Service Offshoring and Productivity: Evidence from the United States

    Microsoft Academic Search

    Mary Amiti; Shang-Jin Wei

    2006-01-01

    The practice of sourcing service inputs from overseas suppliers has been growing in response to new technologies that have made it possible to trade in some business and computing services that were previously considered non-tradable. This paper estimates the effects of offshoring on productivity in US manufacturing industries between 1992 and 2000. It finds that service offshoring has a significant

  4. Quality risk in offshore manufacturing: Evidence from the pharmaceutical industry

    Microsoft Academic Search

    John V. Gray; Aleda V. Roth; Michael J. Leiblein

    2011-01-01

    Does offshore production pose an added quality risk relative to domestic production? If so, what factors influence the quality risk? Progress addressing these deceptively simple questions has been hindered by the challenges associated with (1) difficulties in controlling for a wide range of factors that may potentially affect quality risk in offshore manufacturing and (2) the lack of available measures

  5. Map of Offshore Wind Energy Activity in North America

    NSDL National Science Digital Library

    North American Offshore Wind Project

    This map, from the North American Offshore Wind Project shows a Google map of all locations considered for having offshore wind energy. The location markers also provide information as to which projects are operational, proposed, suspended, or that have notable activity.

  6. International Collaboration on Offshore Wind Energy Under IEA Annex XXIII

    SciTech Connect

    Musial, W.; Butterfield, S.; Lemming, J.

    2005-11-01

    This paper defines the purpose of IEA Annex XXIII, the International Collaboration on Offshore Wind Energy. This international collaboration through the International Energy Agency (IEA) is an efficient forum from which to advance the technical and environmental experiences collected from existing offshore wind energy projects, as well as the research necessary to advance future technology for deep-water wind energy technology.

  7. REVIEW Open Access Assessing environmental impacts of offshore wind

    E-print Network

    Aberdeen, University of

    targets and environmental legislation. Keywords: Marine mammals, Seabirds, Wind turbine, Underwater noise offshore wind farm, Horns Rev 1 (160 MW with 80 turbines of 2 MW), became operational in 2002. The aver- age capacity of turbines and size of offshore wind farms have been increasing since then

  8. In Brief: Environmental standards needed for offshore marine aquaculture

    Microsoft Academic Search

    Sarah Zielinski

    2007-01-01

    The U.S. Congress should enact legislation that sets strong environmental standards for offshore marine aquaculture, the Marine Aquaculture Task Force recommended in a recent report. Aquaculture now accounts for about half of all seafood consumed in the world, and the industry is rapidly growing and expanding into regions offshore (more than 3 nautical miles from the coast) that are controlled

  9. OPTIMAL DEVELOPMENT PLANNING OF OFFSHORE OIL AND GAS FIELD

    E-print Network

    Grossmann, Ignacio E.

    OPTIMAL DEVELOPMENT PLANNING OF OFFSHORE OIL AND GAS FIELD INFRASTRUCTURE UNDER COMPLEX FISCAL Pittsburgh, PA 15213 Abstract The optimal development planning of offshore oil and gas fields has received, well drilling schedule and production profiles of oil, water and gas in each time period. The model can

  10. 26th Annual offshore technology conference: 1994 Proceedings

    SciTech Connect

    Not Available

    1994-01-01

    This conference is the world's largest and most comprehensive technical conference and exhibition on offshore resource development. This conference is divided into four volumes with this volume containing conference papers relative to offshore drilling and well completion information. Papers also deal with construction specifications for marine risers and pipelines, along with any relevant installation and performance information.

  11. Offshore Oil: Environmental Impacts on Land and Sea

    ERIC Educational Resources Information Center

    Baldwin, Pamela L.

    1974-01-01

    Presents a counter position to that provided in SE 512 127 in which the author emphasizes that there are too many problems yet to be solved (related to offshore oil development) to proceed with full-scale development of offshore oil drilling. (PEB)

  12. 110. Offshore Business Process Outsourcing - Staying Competitive v Risk?

    Microsoft Academic Search

    Geoffrey Dick; Dubravka Cecez-Kecmanovic

    As the Information Systems Offshoring and Business Process Outsourcing (BPO) phenomena continue to grow and gain popularity, it is becoming increasingly evident that there is a need to consider a combination of the two, that is, Offshore BPO of IS Processes. This paper explores the factors that a multi-national organisation considered when it \\

  13. ORIGINAL PAPER Review of Methodologies for Offshore Wind Resource

    E-print Network

    Pryor, Sara C.

    installations are a comparatively small part of the wind turbine market. However, since 1999, large wind farms with wind turbines up to 5 MW have been erected offshore especially in the North Sea and Baltic Sea, iORIGINAL PAPER Review of Methodologies for Offshore Wind Resource Assessment in European Seas A. M

  14. Contracts in Offshore Software Development: An Empirical Analysis

    Microsoft Academic Search

    S. Krishnan

    e study the determinants of contract choice in offshore software development projects and examine how the choice of contract and other factors in the project affect project profits accruing to the software vendor.Using data collected on 93 offshore projects from a leading Indian software vendor, we provide evidence that specific vendor-, client-, and project-related characteristics such as requirement uncertainty, project

  15. CHEMICAL COMPOSITION OF PRODUCED WATER AT SOME OFFSHORE OIL PLATFORMS

    EPA Science Inventory

    The effectiveness of produced water treatment was briefly studied in offshore oil and gas extraction operations in Cook Inlet, Alaska, and the Gulf of Mexico. Three offshore oil extraction facilities were examined in the Cook Inlet production field, and seven platforms were studi...

  16. FEED-IN TARIFFS AND OFFSHORE WIND POWER DEVELOPMENT

    E-print Network

    Firestone, Jeremy

    FEED-IN TARIFFS AND OFFSHORE WIND POWER DEVELOPMENT Prepared by Jon Lilley, Blaise Sheridan, Dawn........................................................................................................................ 28 #12; 3 Feed-in Tariffs and Offshore Wind Power Development Prepared Pursuant to DOE Grant Em-Powering Center for Carbon-free Power Integration (CCPI) Final Report November 2010 Prepared under a grant (DE

  17. Offshore Wind Power Experiences, Potential and Key Issues for

    E-print Network

    Offshore Wind Power Experiences, Potential and Key Issues for Deployment Jørgen Lemming, Poul Erik-Erik Clausen Title: Offshore Wind Power Experiences, Potential and Key Issues for Deployment Division: VEA, SYS Risø-R-1673(EN) January 2008 Abstract: Wind power has been growing at spectacular rates. Today

  18. Foundation modelling to assess dynamic behaviour of offshore wind turbines

    Microsoft Academic Search

    M. B. Zaaijer

    2006-01-01

    The dynamic behaviour of wind turbines at offshore locations is more complex than that of both onshore wind turbines and offshore platforms used in the oil and gas industry. In order to reduce the computational burden, the work presented in this paper aims at simplification of the dynamic model of the foundation, while maintaining sufficient accuracy. A stiffness matrix at

  19. Wave Models for Offshore Wind Turbines Puneet Agarwal

    E-print Network

    Manuel, Lance

    Wave Models for Offshore Wind Turbines Puneet Agarwal§ and Lance Manuely Department of Civil turbines--onshore or offshore--the prediction of extreme loads as- sociated with a target (long) return for such extrapolation are obtained by stochastic time- domain simulation of the inflow turbulence and of the turbine

  20. Wind Resource Mapping for United States Offshore Areas: Preprint

    SciTech Connect

    Elliott, D.; Schwartz, M.

    2006-06-01

    The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) is producing validated wind resource maps for priority offshore regions of the United States. This report describes the methodology used to validate the maps and to build a Geographic Information Systems (GIS) database to classify the offshore wind resource by state, water depth, distance from shore, and administrative unit.

  1. E2I EPRI Assessment Offshore Wave Energy Conversion Devices

    E-print Network

    definition study in CY 2004. This study will produce system designs for wave energy conversion device powerE2I EPRI Assessment Offshore Wave Energy Conversion Devices Report: E2I EPRI WP ­ 004 ­ US ­ Rev 1 #12;E2I EPRI Assessment - Offshore Wave Energy Conversion Devices Table of Contents Introduction

  2. STRESS CORROSION OF TYPE 304 STAINLESS STEEL IN SIMULATED SUPERHEAT REACTOR ENVIRONMENTS. I. Informal AEC Research and Develoment Report 568-TIO-2

    Microsoft Academic Search

    G. G. Gaul; W. L. Pearl; M. Siegler

    1962-01-01

    A fuel jacket failure that occurred in May 1961 in the Type 304 ; stainless steel clad fuel element exposed in the Vallecitos Boiling Water Reactor ; superheated steam loop (SADE) was attributed to chloride stress corrosion ; cracking. In order to better understand the failure, a test program was carried ; out to try to reproduce the rapid stress

  3. Job stress, mental health, and accidents among offshore workers in the oil and gas extraction industries.

    PubMed

    Cooper, C L; Sutherland, V J

    1987-02-01

    Psychosocial and occupational stressors among 194 male employees on drilling rig and production platform installations in the United Kingdom and Dutch sectors of the North Sea were studied. Mental well-being and job satisfaction were also assessed, with attention to the incidence of accidents offshore. This occupational group were found to be much less satisfied with their jobs than their onshore counterparts. Although overall mental well-being compared favorably with that of the general population, levels of anxiety were significantly higher. Multivariate analysis showed "relationships at work and at home" to be a strong predictor of both job dissatisfaction and mental ill-health. Type A coronary-prone behavior was also found to be a significant predictor of reduced mental well-being and increased accident rates offshore. PMID:3819891

  4. Ghana seeks to resume offshore production

    SciTech Connect

    Not Available

    1991-06-17

    Ghana National Petroleum Corp. (GNPC) plans a two well offshore drilling program it hopes will lead to a resumption of hydrocarbon production in the West African state. The wells will be drilled in South Tano field in the extreme western sector of Ghana's offshore area, near the boundary with Ivory Coast. If the program is successful, the state company will develop a novel floating production system to handle and export oil. Gas will provide fuel for an electrical power generating unit integrated into a floating production system. Power will move ashore through a submarine cable. North and south Tano fields were discovered by Phillips Petroleum Corp., which relinquished the acreage in 1982. The South Tano discovery well flowed 1,614 b/d of oil and 8.2 MMCfd of gas. Studies by a unit of ARCO, when it was a partner in a group that later acquired the Tano block, pegged North Tano hydrocarbons in place at 53.6 million bbl of oil and 102 bcf of gas. Braspetro, under contract with GNPC, estimated South Tano hydrocarbons in place at 82 million bbl of oil and 100 bcf of gas. GNPC is evaluating the possibility of rehabilitating Saltpond oil field about 150 miles east-northeast of North and South Tano. Saltpond has been shut in since 1985.

  5. Thermometric well testing on the Vietnam offshore

    SciTech Connect

    San, T.N.; Shtyrlin, V.F.; Vakhitov, G.G.; Loi, L.M.; Listengarten, L.; Hien, D.L.

    1994-12-31

    It is impossible to control and adjust an oil and gas field development without determining the flow intervals of production wells. For that it is preferable to get production profiles by using the downhole flowmeter. There are, however, some main restrictions for wide-spread application of them on the offshore of Vietnam as follows: the flowmeter spinner velocity cannot indicate correctly in the open hole wells having a nonuniform diameter; it is unable to carry out in the case when the tubing shoe is lower than top formation on 300--500m. In this paper, the authors present a summary of temperature profile method to determine the flowing and intaking intervals of wells drilled in basement of the White Tiger Field on Vietnam offshore. For the last 2 years more than 30 wells were surveyed by this method in the above mentioned conditions. This paper presents the theory and practice of well temperature profile surveys, the concrete examples of data interpretation using the software Oiltest.

  6. Integrated reservoir study - M/T structure offshore Abu Dhabi

    SciTech Connect

    Cartier, G.; Combes, J.T. des; Hassan, T.H. [and others

    1995-08-01

    A multidisciplinary approach involving geology, geophysics, petrophysics and reservoir engineering is used to assess the oil-bearing Thamama reservoirs in the Offshore Abu Dhabi M/T Structure. The structural definition is hampered by subtle variations of the seismic velocities created by shallow high velocity channel fills. Improved time to depth conversion was achieved through detailed velocity studies and layer caking. As currently defined at the Thamama level, the M/T structure is a gentle low relief feature with closure of about 125 feet. The Lower Cretaceous Thamama Group comprises the producing zones and consists of a succession which was deposited over an extensive carbonate ramp platform. Seven depositional environments and fifteen associated lithofacies range from slope or basin edge, gradually passing to fore shoal, algal shoal, and rudistid backshoal of the inner ramp. Three third order sequences, their associated systems tracts, sequence boundaries and shallowing upwards parasequences are recognised. Based on geological and petrophysical data, a rock type scheme was developed as a basis for detailed reservoir layering and simulation studies. The main diagenetic processes which adversely affect porosity are circumgranular, ferroan and non-ferroan calcite and saddle dolomite cementation, while leaching is the primary porosity-enhancing process. Conventional and special core analyses indicate that specific poroperm, petrophysical and engineering parameters can be assigned to various rock types. The integration of all disciplines will optimise future appraisal drilling and lead to a more efficient development strategy of this field.

  7. Mechanical properties at high strain-rate of lead core and brass jacket of a NATO 7.62 mm ball bullet

    NASA Astrophysics Data System (ADS)

    Peroni, L.; Scapin, M.; Fichera, C.; Manes, A.; Giglio, M.

    2012-08-01

    Numerical simulations are now an actual option in order to try to reproduce and understand the mechanical response in components subjected to extreme loading conditions, like in a ballistic impact. A correct materials calibration is therefore necessary in order to extract the materials parameters. In this work the simple and widely used Johnson-Cook model was used to analyse the experimental data obtained for the characterization of the bullet materials. The bullet under investigation is a full metal jacket ball, with a lead-antimony alloy core and a brass jacket. The experimental tests cover a wide range in strain-rate, starting from quasi-static tests up to high dynamic tests performed on a standard Split Hopkinson Pressure Bar setup. In general, there is a great lack in strain-rate sensitivity and failure data. Pure lead is very soft and ductile, so antimony is used to give greater hardness and strength. The results of this study show a significant strain-rate influence for this alloy that can be associated with the presence of the lead-antimony phases and their structures. Also in case of the brass the results showed significant strain-rate sensitivity in the material response.

  8. [How Straight the Jacket?

    ERIC Educational Resources Information Center

    Ward, F. Champion

    The educational system is wracked by three crises: the crisis of efficiency and support; the crisis of relevance and control; and the crisis of race and class. Concerning the first, budgeteers and law makers will soon want answers about the efficiency of the present distribution of educational tasks and levels, new programs, and the use of new…

  9. Geospatial characteristics of Florida's coastal and offshore environments: Administrative and political boundaries and offshore sand resources

    USGS Publications Warehouse

    Demopoulos, Amanda W.J.; Foster, Ann M.; Jones, Michal L.; Gualtieri, Daniel J.

    2011-01-01

    The Geospatial Characteristics Geopdf of Florida's Coastal and Offshore Environments is a comprehensive collection of geospatial data describing the political and natural resources of Florida. This interactive map provides spatial information on bathymetry, sand resources, military areas, marine protected areas, cultural resources, locations of submerged cables, and shipping routes. The map should be useful to coastal resource managers and others interested in the administrative and political boundaries of Florida's coastal and offshore region. In particular, as oil and gas explorations continue to expand, the map may be used to explore information regarding sensitive areas and resources in the State of Florida. Users of this geospatial database will find that they have access to synthesized information in a variety of scientific disciplines concerning Florida's coastal zone. This powerful tool provides a one-stop assembly of data that can be tailored to fit the needs of many natural resource managers.

  10. Offshore Finfish Aquaculture in the United States: An Examination of Federal Laws That Could be Used to Address Environmental and Occupational Public Health Risks

    PubMed Central

    Fry, Jillian P.; Love, David C.; Shukla, Arunima; Lee, Ryan M.

    2014-01-01

    Half of the world’s edible seafood comes from aquaculture, and the United States (US) government is working to develop an offshore finfish aquaculture industry in federal waters. To date, US aquaculture has largely been regulated at the state level, and creating an offshore aquaculture industry will require the development of a new regulatory structure. Some aquaculture practices involve hazardous working conditions and the use of veterinary drugs, agrochemicals, and questionable farming methods, which could raise environmental and occupational public health concerns if these methods are employed in the offshore finfish industry in the US. This policy analysis aims to inform public health professionals and other stakeholders in the policy debate regarding how offshore finfish aquaculture should be regulated in the US to protect human health; previous policy analyses on this topic have focused on environmental impacts. We identified 20 federal laws related to offshore finfish aquaculture, including 11 that are relevant to preventing, controlling, or monitoring potential public health risks. Given the novelty of the industry in the US, myriad relevant laws, and jurisdictional issues in an offshore setting, federal agencies need to work collaboratively and transparently to ensure that a comprehensive and functional regulatory structure is established that addresses the potential public health risks associated with this type of food production. PMID:25415208

  11. Quantifying the hurricane catastrophe risk to offshore wind power.

    PubMed

    Rose, Stephen; Jaramillo, Paulina; Small, Mitchell J; Apt, Jay

    2013-12-01

    The U.S. Department of Energy has estimated that over 50 GW of offshore wind power will be required for the United States to generate 20% of its electricity from wind. Developers are actively planning offshore wind farms along the U.S. Atlantic and Gulf coasts and several leases have been signed for offshore sites. These planned projects are in areas that are sometimes struck by hurricanes. We present a method to estimate the catastrophe risk to offshore wind power using simulated hurricanes. Using this method, we estimate the fraction of offshore wind power simultaneously offline and the cumulative damage in a region. In Texas, the most vulnerable region we studied, 10% of offshore wind power could be offline simultaneously because of hurricane damage with a 100-year return period and 6% could be destroyed in any 10-year period. We also estimate the risks to single wind farms in four representative locations; we find the risks are significant but lower than those estimated in previously published results. Much of the hurricane risk to offshore wind turbines can be mitigated by designing turbines for higher maximum wind speeds, ensuring that turbine nacelles can turn quickly to track the wind direction even when grid power is lost, and building in areas with lower risk. PMID:23763387

  12. On the Offshore Advection of Boundary-Layer Structures and the Influence on Offshore Wind Conditions

    NASA Astrophysics Data System (ADS)

    Dörenkämper, Martin; Optis, Michael; Monahan, Adam; Steinfeld, Gerald

    2015-02-01

    The coastal discontinuity imposes strong signals to the atmospheric conditions over the sea that are important for wind-energy potential. Here, we provide a comprehensive investigation of the influence of the land-sea transition on wind conditions in the Baltic Sea using data from an offshore meteorological tower, data from a wind farm, and mesoscale model simulations. Results show a strong induced stable stratification when warm inland air flows over a colder sea. This stratification demonstrates a strong diurnal pattern and is most pronounced in spring when the land-sea temperature difference is greatest. The strength of the induced stratification is proportional to this parameter and inversely proportional to fetch. Extended periods of stable stratification lead to increased influence of inertial oscillations and increased frequency of low-level jets. Furthermore, heterogeneity in land-surface roughness along the coastline is found to produce pronounced horizontal streaks of reduced wind speeds that under stable stratification are advected several tens of kilometres over the sea. The intensity and length of the streaks dampen as atmospheric stability decreases. Increasing sea surface roughness leads to a deformation of these streaks with increasing fetch. Slight changes in wind direction shift the path of these advective streaks, which when passing through an offshore wind farm are found to produce large fluctuations in wind power. Implications of these coastline effects on the accurate modelling and forecasting of offshore wind conditions, as well as damage risk to the turbine, are discussed.

  13. 75 FR 418 - Certificate of Alternative Compliance for the Offshore Supply Vessel KELLY ANN CANDIES

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-05

    ...for the Offshore Supply Vessel KELLY ANN CANDIES AGENCY: Coast Guard, DHS. ACTION...for the offshore supply vessel KELLY ANN CANDIES as required by 33 U.S.C. 1605(c...Purpose The offshore supply vessel KELLY ANN CANDIES will be used for offshore supply...

  14. Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with

    E-print Network

    Nørvåg, Kjetil

    Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with Emphasis of offshore wind turbines Defense: 09.12.2012 2012 - : Structural Engineer in Det Norske Veritas (DNV) 2007 and higher wind speed, and less visual disturbance and noise for offshore wind energy. Offshore wind

  15. Proceedings of OMAE2008: The 27th International Conference on Offshore Mechanics & Arctic Engineering

    E-print Network

    instrumented several of them on a number of mobile offshore drilling units (MODUs) and offshore production integrity for offshore drilling risers. This effort has included in-situ, full- scale monitoring of drillingProceedings of OMAE2008: The 27th International Conference on Offshore Mechanics & Arctic

  16. An Empirical Investigation of Client Managers’ Responsibilities in Managing Offshore Outsourcing of Software-Testing Projects

    Microsoft Academic Search

    Radhika P. Jain; Robin S. Poston; Judith C. Simon

    2011-01-01

    Despite an increase in the offshore outsourcing of in- formation technology (IT) projects, little research has been carried out to identify issues that client managers (CMs) encounter when managing projects with offshore vendors. Also research on how CMs' responsibilities change to effectively manage offshore out- sourcing relationships has received little attention. We conducted a case study of an offshore outsourcing

  17. Economic Integration, IT Intensity and the Aggregate Economic Impacts of IT Services Offshoring

    Microsoft Academic Search

    Yen-Chun Chou; Robert J. Kauffman

    2010-01-01

    This study examines the economic contributions of offshore IT outsourcing (or IT offshoring for short) by using an extended Cobb-Douglas production function, and a panel data set from 20 OECD countries over the 2000 to 2006 period. Our analysis indicates that IT offshoring has made a positive and significant contribution to national productivity. Previous research on IT offshoring has relied

  18. Offshore structure and method of sinking same

    SciTech Connect

    Fern, D. T.

    1985-02-05

    An offshore structure and a method of skinking it to the sea bed. In accordance with one aspect of this invention, the structure is sunk asymmetrically by first sinking a first end portion thereof and then sinking the other end portion. The first end portion is sunk by ballasting it while the other end portion is closed to ballast. The structure is provided with sufficient water plane area while sinking each end portion to maintain stability during the sinking process. In accordance with another aspect of this invention, at least two spaced-apart piles are provided at the end corresponding to the first end portion to absorb the force of impact with the sea bed and to maintain a skirt on the structure out of contact with the sea bed until both ends of the structure have been sunk to the sea bed.

  19. Recent advances in offshore pipeline technology

    SciTech Connect

    Bruschi, R.; Vitali, L. [Snamprogetti S.p.A., Fano (Italy)

    1994-12-31

    Since the pioneering construction of the TRANSMED pipeline system across the Sicily Channel in the early 80`s, offshore pipeline technology has been progressing towards more and more difficult environments. Now the projects envisaged for the 90`s are venturing far beyond the challenges of the recent past. The scope of this paper is to present the recent research efforts aimed at tackling the main design aspects of the new challenges. Particular attention will be given to the experiences and achievements on the last few years in transmission pipelines across the European Continental Shelf, e.g. in the Central and Southern North Sea and across the Mediterranean Sea. Technologies, tools and purpose developed criteria will be discussed. The performance of current operating pipeline systems will be reviewed and incentives to rationalize design criteria and guidelines will be illustrated.

  20. Meren field water injection project offshore Nigeria

    SciTech Connect

    Adetoba, L.A.

    1984-04-01

    The Meren Water Injection Project, which is one of the largest in West Africa in terms of injection volume, secondary reserves to be recovered and cost, is located in the Meren field offshore Nigeria. This study presents an updated comprehensive plan to deplete 7 reservoir units in sands that have been producing under solution gas drive and gravity segregation with minimal water influx. The reservoir units contain ca 80% of the original oil-in-place in Meren field. Detailed studies have been undertaken to evaluate the performances of the 7 reservoirs with a view to developing a secondary recovery plan which has been brought into reality. Injection was to start in mid-1982 but was delayed until mid-1983. The effect of the delay and the changing of injector locations on recovery and cost is discussed.

  1. Elsam: Horns Rev Offshore Wind Farm

    NSDL National Science Digital Library

    The Danish energy producing company Elsam is currently building "the world's largest offshore wind farm" in the North Sea. 80 turbines were erected over summer 2002, which was when the project began. The Horns Rev project is part of a long term plan for Denmark to reduce carbon dioxide emissions 50 percent by 2030. A monthly newsletter is published online with all of the developments and milestones accomplished. There is substantial material on the wind farm's construction. The specifications of the turbines are quite impressive. Analysis of wind speeds, water conditions, and other location specific data conveys the complexity of the design process. A description of the various stages of construction is also very interesting.

  2. Environmental load uncertainties for offshore structures

    SciTech Connect

    Nessim, M.A.; Hong, H.P. [Centre for Engineering Research Inc., Edmonton, Alberta (Canada); Jordaan, I.J. [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Faculty of Engineering and Applied Science

    1995-11-01

    A methodology for assessing the effect of different sources of uncertainty on the calculation of load effect on offshore structures is presented. A consistent classification of uncertainties was adopted and used as a basis to develop models to estimate the effect of different uncertainties on specified design loads. It is shown that distribution parameter uncertainties arising from limitations on the quantity of statistical data are not likely to have a significant effect on design loads. By contrast, model uncertainties can greatly increase the design loads, and the increase is sensitive to the probabilistic models used to describe model error. The methodology and results can be used by design engineers to take model uncertainties into account in estimating specified loads. They also form the basis for developing and calibrating a new information-sensitive code format.

  3. Troll, Haltenpipe showcase offshore pipelay advances

    SciTech Connect

    Blaker, F.; Gjertveit, E.; Breivik, J. [Den Norske Stats Oljeselskap a.s., Stavanger (Norway)

    1996-07-29

    Pipelines installed on the Norwegian continental shelf represent current offshore pipeline installation technology for pipe size (up to 40 in.), water depth (to 540 m) distance between pigging stations (up to 800 km), and complex seabed intervention and landfall construction. Furthermore, the number of deepwater pipelines worldwide has triggered significant advances in the development of pipeline repair. The Troll oil pipeline and Haltenpipe projects faced technical challenges: irregular seabed, conditions requiring highly accurate mapping, careful routing, free-span design, seabed preparation works, and special low-tension lay techniques. The two projects, therefore, have in many ways benefited from each other and been run practically as one large integrated project. The paper describes the design, route preparation, and installation for both pipelines.

  4. Beyond offshoring: assess your company's global potential.

    PubMed

    Farrell, Diana

    2004-12-01

    In the past few years, companies have become aware that they can slash costs by offshoring: moving jobs to lower-wage locations. But this practice is just the tip of the iceberg in terms of how globalization can transform industries, according to research by the McKinsey Global Institute (MGI). The institute's yearlong study suggests that by streamlining their production processes and supply chains globally, rather than just nationally or regionally, companies can lower their costs-as we've seen in the consumer-electronics and PC industries. Companies can save as much as 70% of their total costs through globalization--50% from offshoring, 5% from training and business-task redesign, and 15% from process improvements. But they don't have to stop there. The cost reductions make it possible to lower prices and expand into new markets, attracting whole new classes of customers. To date, however, few businesses have recognized the full scope of performance improvements that globalization makes possible, much less developed sound strategies for capturing those opportunities. In this article, Diana Farrell, director of MGI, offers a step-by-step approach to doing both things. Among her suggestions: Assess where your industry falls along the globalization spectrum, because not all sectors of the economy face the same challenges and opportunities at the same time. Also, pay attention to production, regulatory, and organizational barriers to globalization. If any of these can be changed, size up the cost-saving (and revenue-generating) opportunities that will emerge for your company as a result of those changes. Farrell also defines the five stages of globalization-market entry, product specialization, value chain disaggregation, value chain reengineering, and the creation of new markets-and notes the different levers for cutting costs and creating value that companies can use in each phase. PMID:15605568

  5. Design implications of the high yield to ultimate ratio of high strength steels in offshore engineering

    SciTech Connect

    Healy, J.; Billingham, J. [Cranfield Univ. (United Kingdom); Billington, C.; Bolt, H. [BOMEL, Maidenhead (United Kingdom)

    1995-12-31

    High strength steels are finding increased usage in offshore applications. However, because such steels possess different stress-strain relationships from conventional lower strength structural steels, some designers have expressed concern about their deformation capacity. Moreover, restrictions exist within material specification and design codes which severely disadvantage and penalize the use of high strength steels. This paper reviews current design procedures for using high strength steels in offshore structures which establish restrictions on yield ratio (YR) value and allowable design stress, and identifies the basis of these limits and their relevance. Furthermore, information is presented on the typical mechanical properties developed by the type of modern high strength steel, in yield strength range 355--550MPa, likely to be used in future offshore construction, and identifies the reasons behind the changes in stress-strain behavior. This study indicates that a wide variety of steels with excellent combinations of strength, toughness and weldability are now available from a number of manufacturers worldwide. In addition, preliminary modelling studies on structural behavior of simple joint models indicate that high strength steels may perform satisfactorily, the influence of YR being much less than considered in the codes of practice. This suggests that current limits on YR value and design stress are excessively restrictive.

  6. Assessment of Offshore Wind System Design, Safety, and Operation Standards

    SciTech Connect

    Sirnivas, S.; Musial, W.; Bailey, B.; Filippelli, M.

    2014-01-01

    This report is a deliverable for a project sponsored by the U.S. Department of Energy (DOE) entitled National Offshore Wind Energy Resource and Design Data Campaign -- Analysis and Collaboration (contract number DE-EE0005372; prime contractor -- AWS Truepower). The project objective is to supplement, facilitate, and enhance ongoing multiagency efforts to develop an integrated national offshore wind energy data network. The results of this initiative are intended to 1) produce a comprehensive definition of relevant met-ocean resource assets and needs and design standards, and 2) provide a basis for recommendations for meeting offshore wind energy industry data and design certification requirements.

  7. 26th annual offshore technology conference, 1994 proceedings

    SciTech Connect

    Not Available

    1994-01-01

    This conference is the world's largest and most comprehensive technical conference and exhibition on offshore resource development. The four Proceedings volumes have been separated by major areas of interest, with relative sessions included in each volume. This Volume 3 contains information relative to offshore platforms and marine system designs. It describes both the installation and decommissioning of offshore platforms, retrofitting platforms to meet current safety standards, and technology assessments for both drilling and platform designs. Papers are also provided which describe maintenance and repair technologies for damages to platform.

  8. Mid-year report. [Review of offshore petroleum industry activity

    SciTech Connect

    Not Available

    1983-05-01

    A mid-year review and forecast for the offshore energy focuses on the impact of energy prices, worldwide drilling, the market for marine transportation, the mobile rig market, the diving industry, construction prospects, and seismic activity. The price of oil is seen as the most influential factor affecting offshore programs being considered for the next 10 yr. The analysis of drilling data indicates the trend for offshore activity will continue to rise, notwithstanding the current rig activity statistics. The growing importance of remotely operated vehicles in the diving industry is noted.

  9. Advanced Technologies For Turbomachinery to Utilize Effectively Renewable Energies at Offshore

    NASA Astrophysics Data System (ADS)

    Kanemoto, Toshiaki

    2010-06-01

    For the next leap in the sustainable energy exploitations, we are under obligations not only to cope with the warming global environment but also to conserve natural ecosystems and to coexist with natures. This paper introduces the following advanced technologies in Kyushu Institute of Technology, to utilize effectively the promising ocean and wind resources at the offshore. (1) Counter-Rotating Type Reversible Hydroelectric Unit, which is composed of the tandem runners and the peculiar generator with the double rotational armatures, is applicable to both rising and falling tides at the power station with the embankment, in place of the traditional bulb type turbines. (2) Gyro-Type Reversible Hydraulic Turbine, which is composed of some blades with the high aspect ratio, is effective to utilize the tide power even at the shallow and/or the very low range of the tide. (3) Submerged Ocean Wave Power Unit, where a pair of floats is lined up at the interval of one wave pitch and supports the vertical type hydroelectric unit submerged at the middle position, can get velocity energy eight times higher than the traditional unit. (4) Intelligent Wind Power Unit, which is composed of the tandem wind rotors and the double rotational armature type generator, is suitable for the offshore wind farm.

  10. Overlap in offshore habitat use by double-crested cormorants and boaters in western Lake Erie

    USGS Publications Warehouse

    Stapanian, Martin A.; Bur, Michael T.

    2002-01-01

    Double-crested cormorants (Phalacrocorax auritus) and boats of 2 length classes (a?? 8 m and > 8 m) were counted from a boat along 31 established strip transects in western Lake Erie from 24 April to 1 September 2000. Each transect included only one of the following habitats: (1) offshore of a breeding island or roosting/loafing area for cormorants ('refuge'), (2) reefs or shoals, (3) open water, or (4) offshore of an island shoreline that had evidence of development by humans. Foraging cormorants were recorded most often offshore of refuges and least often on open water. There was no difference between the numbers of foraging cormorants/kmA? recorded offshore of developed shorelines and on reefs and shoals. More than half of all boats recorded were on transects that were within 1 km of developed shorelines. Among those transects > 1 km from developed shorelines, there were no differences among the habitats for the number of boats of either length class. The respective ranks of the 31 transect means of the number of cormorants/kmA? and the numbers of boats/kmA? in either length class were uncorrelated. The results suggest that (1) cormorants select foraging habitats based mainly on shoreline type, distance from shoreline, and depth, and (2) the amount of boat traffic is influenced by proximity to port and trip objectives, including sport angling and recreational boating. Although there is overlap in habitat use by cormorants and humans, this overlap is not complete. The perception of cormorants as a threat to fish populations may in part be due to this overlap.

  11. Variable Frequency Operations of an Offshore Wind Power Plant with HVDC-VSC: Preprint

    SciTech Connect

    Gevorgian, V.; Singh, M.; Muljadi, E.

    2011-12-01

    In this paper, a constant Volt/Hz operation applied to the Type 1 wind turbine generator. Various control aspects of Type 1 generators at the plant level and at the turbine level will be investigated. Based on DOE study, wind power generation may reach 330 GW by 2030 at the level of penetration of 20% of the total energy production. From this amount of wind power, 54 GW of wind power will be generated at offshore wind power plants. The deployment of offshore wind power plants requires power transmission from the plant to the load center inland. Since this power transmission requires submarine cable, there is a need to use High-Voltage Direct Current (HVDC) transmission. Otherwise, if the power is transmitted via alternating current, the reactive power generated by the cable capacitance may cause an excessive over voltage in the middle of the transmission distance which requires unnecessary oversized cable voltage breakdown capability. The use of HVDC is usually required for transmission distance longer than 50 kilometers of submarine cables to be economical. The use of HVDC brings another advantage; it is capable of operating at variable frequency. The inland substation will be operated to 60 Hz synched with the grid, the offshore substation can be operated at variable frequency, thus allowing the wind power plant to be operated at constant Volt/Hz. In this paper, a constant Volt/Hz operation applied to the Type 1 wind turbine generator. Various control aspects of Type 1 generators at the plant level and at the turbine level will be investigated.

  12. Homopolar pulse welding for offshore deep water pipelines

    SciTech Connect

    Haase, P.W.; Carnes, R.W.; Hudson, R.S. [Univ. of Texas, Austin, TX (United States). Center for Electromechanics

    1995-12-31

    Homopolar pulse welding (HPW) is a one-shot resistance welding process being investigated as a method to join API 5L carbon steel line pipe. Homopolar pulse welding utilizes the high current, low voltage electrical pulse produced by a homopolar generator to rapidly resistance heat the interface between abutting pipe ends, producing a full circumference resistance forge weld requiting no filler metal in under three seconds. A five year joint industry program is sponsoring HPW research with the goal of developing the process for deep water offshore pipeline construction utilizing the J-lay method The first two years of the program have concentrated on weld parameter optimization by producing, testing, and evaluating welds in various grades, wall thicknesses, types and compositions of 3 inch nominal (3.5 inch OD) diameter API 5L carbon steel pipe. Mechanical properties of the welds and parent metal were evaluated by tensile testing, impact testing, and hardness traverse testing according to guidelines and criteria established by the industrial sponsors. Homopolar pulse welding has demonstrated the capability to produce industrially acceptable full circumference welds in carbon steel line pipe via a rapid, one-shot process. Future work will concentrate on developing the process for commercial field installation, with the program`s goal being the demonstration of a prototype system for producing HPW welds in 12 inch diameter pipe in a J-lay configuration.

  13. Dependence of offshore wind turbine fatigue loads on atmospheric stratification

    NASA Astrophysics Data System (ADS)

    Hansen, K. S.; Larsen, G. C.; Ott, S.

    2014-06-01

    The stratification of the atmospheric boundary layer (ABL) is classified in terms of the M-O length and subsequently used to determine the relationship between ABL stability and the fatigue loads of a wind turbine located inside an offshore wind farm. Recorded equivalent fatigue loads, representing blade-bending and tower bottom bending, are combined with the operational statistics from the instrumented wind turbine as well as with meteorological statistics defining the inflow conditions. Only a part of all possible inflow conditions are covered through the approximately 8200 hours of combined measurements. The fatigue polar has been determined for an (almost) complete 360° inflow sector for both load sensors, representing mean wind speeds below and above rated wind speed, respectively, with the inflow conditions classified into three different stratification regimes: unstable, neutral and stable conditions. In general, impact of ABL stratification is clearly seen on wake affected inflow cases for both blade and tower fatigue loads. However, the character of this dependence varies significantly with the type of inflow conditions - e.g. single wake inflow or multiple wake inflow.

  14. Canadian offshore oil production solution gas utilization alternatives

    SciTech Connect

    Wagner, J.V.

    1999-07-01

    Oil and gas development in the Province of Newfoundland and Labrador is in its early stage and the offshore industry emphasis is almost exclusively on oil production. At the Hibernia field, the Gravity Base Structure (GBS) is installed and the first wells are in production. The Terra Nova project, based on a Floating Production Storage Offloading (FPSO) ship shaped concept, is in its engineering and construction stage and first oil is expected by late 2000. Several other projects, such as Husky's White Rose and Chevron's Hebron, have significant potential for future development in the same area. It is highly probably that these projects will employ the FPSO concept. It is also expected that the solution gas disposal issues of such second generation projects will be of more significance in their regulatory approval process and of such second generation projects will be of more significance in their regulatory approval process and the operators may be forced to look for alternatives to gas reinjection. Three gas utilization alternatives for a FPSO concept based project have been considered and evaluated in this paper: liquefied natural gas (LNG), compressed natural gas (CNG), and gas-to-liquids conversion (GTL). The evaluation and the relative ranking of these alternatives is based on a first pass screening type of study which considers the technical and economical merits of each alternative. Publicly available information and in-house data, compiled within Fluor Daniel's various offices, was used to establish the basic parameters.

  15. 14. OFFSHORE VIEW OF PIER, LOOKING SOUTHEAST, SHOWING (LEFTRIGHT) PUMPHOUSE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. OFFSHORE VIEW OF PIER, LOOKING SOUTHEAST, SHOWING (LEFT-RIGHT) PUMPHOUSE, TACKLE BOX, RESTROOMS ON 3RD TEE - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

  16. 12. OFFSHORE VIEW OF PIER, LOOKING EAST, SHOWING LIFEGUARD TOWER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. OFFSHORE VIEW OF PIER, LOOKING EAST, SHOWING LIFEGUARD TOWER AND 2ND TEE (CENTER), REFUGE BAY (RIGHT) - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

  17. Coupled Dynamic Analysis of Multiple Unit Floating Offshore Wind Turbine

    E-print Network

    Bae, Yoon Hyeok

    2013-04-23

    In the present study, a numerical simulation tool has been developed for the rotor-floater-tether coupled dynamic analysis of Multiple Unit Floating Offshore Wind Turbine (MUFOWT) in the time domain including aero-blade-tower dynamics and control...

  18. 77 FR 26562 - Mobile Offshore Drilling Unit Dynamic Positioning Guidance

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-04

    ...of availability and request for comments regarding a draft policy letter on Dynamic Positioning (DP) Systems, Emergency Disconnect Systems, Blowout Preventers, and related training and emergency procedures on a Mobile Offshore Drilling Unit. We...

  19. Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm

    E-print Network

    Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2003 #12;Hard Design ApS #12;Horns Rev. Hard Bottom Substrate Monitoring Page 3 Annual Status Report 2003 Doc. No. 2230

  20. 46 CFR 15.520 - Mobile offshore drilling units.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...MMC as offshore installation manager (OIM), barge supervisor (BS), or ballast control operator (BCO) authorizes service only...license or MMC officer endorsement as mate and an endorsement as BS or BCO. An individual holding a license or MMC officer...

  1. 46 CFR 15.520 - Mobile offshore drilling units.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...MMC as offshore installation manager (OIM), barge supervisor (BS), or ballast control operator (BCO) authorizes service only...license or MMC officer endorsement as mate and an endorsement as BS or BCO. An individual holding a license or MMC officer...

  2. 46 CFR 15.520 - Mobile offshore drilling units.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...MMC as offshore installation manager (OIM), barge supervisor (BS), or ballast control operator (BCO) authorizes service only...license or MMC officer endorsement as mate and an endorsement as BS or BCO. An individual holding a license or MMC officer...

  3. 46 CFR 15.520 - Mobile offshore drilling units.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...MMC as offshore installation manager (OIM), barge supervisor (BS), or ballast control operator (BCO) authorizes service only...license or MMC officer endorsement as mate and an endorsement as BS or BCO. An individual holding a license or MMC officer...

  4. Use of a mobile diving support vessel, Offshore California

    SciTech Connect

    Carroll, J.P.

    1983-03-01

    The Blue Dolphin is a converted workboat with a one-atmosphere manipulator bell diving system. It provides diving support for Chevron's offshore drilling program. This support includes underwater inspection, repair and salvage.

  5. Plastic Limit Analysis of Offshore Foundation and Anchor

    E-print Network

    Chi, Chao-Ming

    2010-10-12

    the course of this research. Dr. Aubeny has been a great advisor and mentor, providing me with valuable opportunities to broaden my knowledge and further myself in the plasticity theory and offshore foundations field. In academic research, I learned... and activities, enriching my Aggie life wonderfully. I am also thankful to Evan Zimmerman, the manager of Delmar Systems, for providing a good opportunity to touch more issues and people in the offshore field. Finally, big thanks to my family and persons who...

  6. Bodyshopping versus offshoring among Indian software and information technology firms

    Microsoft Academic Search

    Sumit K. MajumdarKenneth; Kenneth L. Simons; Ashok Nag

    2011-01-01

    Investigations of offshore outsourcing of information systems have presented little evidence on developing country software\\u000a and information technology (IT) industries. This study probes how Indian software and IT suppliers trade off work in India\\u000a versus bodyshopping of employees. Worldwide clients view these practices as full offshoring versus on-shore temporary hiring\\u000a from an Indian firm, but these practices are probed from

  7. CHAPTER 10 CONCLUDING THOUGHTS: THE FUTURE OF OFFSHORE AQUACULTURE

    Microsoft Academic Search

    Christopher J. Bridger

    The Offshore Aquaculture Consortium (OAC) was created as a collaborative, Gulf-wide, interdis- ciplinary research and development program in response to the U.S. Department of Commerce Aquaculture Policy. OAC research has demonstrated numerous components of offshore aquacul- ture in the Gulf of Mexico including permitting requirements, mooring systems, cage\\/mooring survival during several hurricanes and tropical storms, automatic feeding capabilities, and fish

  8. Reliability-based Design of Offshore Mooring Systems

    E-print Network

    Mousavi, Mir Emad

    2013-02-05

    RELIABILITY-BASED DESIGN OF OFFSHORE MOORING SYSTEMS A Dissertation by MIR EMAD MOUSAVI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR... Copyright 2013 Mir Emad Mousavi ii ABSTRACT This study proposes new methods for the reliability-based design of structural systems, with emphasis on offshore mooring systems. After a brief introduction to the mooring systems, two main objectives...

  9. Offshore Wind Resource Potential of the United States

    Microsoft Academic Search

    D. Heimiller; S. Haymes; M. Schwartz; W. Musial

    2007-01-01

    Offshore wind resources have the potential to be a significant domestic energy source. Many coastal areas have large electricity demand but have limited access to high-quality, land-based wind resource. The U.S. Department of Energy's National Renewable Energy Laboratory has developed a baseline offshore wind resource database that incorporates physical parameters that impact development. These characteristics include wind power class, water

  10. Dynamically coupled 3D pollutant dispersion model for assessing produced water discharges in the Canadian offshore area.

    PubMed

    Zhao, Lin; Chen, Zhi; Lee, Kenneth

    2013-02-01

    Produced water is the contaminated water that is brought to the surface in the process of recovering oil and gas. On the basis of discharge volume, this type of contaminated water is the largest contributor to the offshore waste stream. Modeling studies of large amounts of wastewater discharge into offshore areas have helped in the understanding of pollutant dispersion behaviors in marine environments and in further evaluating the potential environmental effects resulting from produced water discharges. This study presents an integrated three-dimensional (3D) approach for the simulation of produced water discharges in offshore areas. Specifically, an explicit second-order finite difference method was used to model the far-field pollutant dispersion behavior, and this method was coupled with the jet-plume model JETLAG with an extension of the 3D cross-flow conditions to simulate the near-field mixing processes. A dynamic coupling technique with full consideration of the interaction between the discharged fluids and receiving waters was employed in the model. A case study was conducted on the Grand Banks of Newfoundland, Canada. The field validation of the modeling results was conducted for both the near-field and far-field dispersion processes, and the modeling results were in good agreement with the field observations. This study provides an integrated system tool for the simulation of complex transport processes in offshore areas, and the results from such modeling systems can be further used for the risk assessment analysis of the surface water environment. PMID:23268698

  11. Massive sediment bypassing on the lower shoreface offshore of a wide tidal inlet - Cat Island Pass, Louisiana

    USGS Publications Warehouse

    Jaffe, B.E.; List, J.H.; Sallenger, A.H., Jr.

    1997-01-01

    Analysis of a series of historical bathymetric and shoreline surveys along the Louisiana coast west of the Mississippi River mouth detected a large area of deposition in water depths of 2.0-8.5 m offshore of a 9-km- wide tidal inlet, the Cat Island Pass/Wine Island Pass system. A 59.9 ?? 106 m3 sandy deposit formed from the 1930s-1980s, spanning 27 km in the alongshore direction, delineating the transport pathway for sediment bypassing offshore of the inlet on the shoreface. Bypassing connected the shorefaces of two barrier island systems, the Isles Dernieres and the Bayou Lafourche. The processes responsible for formation of this deposit are not well understood, but sediment-transport modeling suggests that sediment is transported primarily by wind-driven coastal currents during large storms and hurricanes. Deposition appears to be related to changes in shoreline orientation, closing of transport pathways into a large bay to the east and the presence of tidal inlets. This newly documented type of bypassing, an offshore bypassing of the inlet system, naturally nourished the immediate downdrift area, the eastern Isles Dernieres, where shoreface and shoreline erosion rates are about half of pre-bypassing rates. Erosion rates remained the same farther downdrift, where bypassing has not yet reached. As this offshore bypassing continues, the destruction of the Isles Dernieres will be slowed.

  12. International Journal of Offshore and Polar Engineering (ISSN 1053-5381) Copyright by The International Society of Offshore and Polar Engineers

    E-print Network

    Manuel, Lance

    for shear and overturning moment at the seabed for an active stall-regulated wind turbine located at 2 the Accuracy of Offshore Wind Turbine Reliability-based Design Loads from the Environmental Contour Method Korn-regulated offshore wind turbine. Two different Danish offshore environments, Rødsand and Horns Rev, are considered

  13. Fluid additive and specialized PDC bits improve ROP in offshore applications

    SciTech Connect

    Jones, T.A.

    1997-02-01

    Improving drilling rates of penetration (ROP) has always been a concern of operators in the oil and gas industry. This concern is increasingly prevalent as costs associated with drilling in challenging offshore environments continue to rise, which increases the impact of ROP improvements on overall project economics. Factors such as drilling fluid, bit design, hydraulics, weight on bit, rotary speed and bit balling affect a well`s overall ROP. This article focuses on two of the factors: drilling fluid type and bit selection.

  14. U.S. Offshore Wind Manufacturing and Supply Chain Development

    SciTech Connect

    Hamilton, Bruce Duncan [Navigant Consulting, Inc.

    2013-02-22

    The objective of the report is to provide an assessment of the domestic supply chain and manufacturing infrastructure supporting the U.S. offshore wind market. The report provides baseline information and develops a strategy for future development of the supply chain required to support projected offshore wind deployment levels. A brief description of each of the key chapters includes: » Chapter 1: Offshore Wind Plant Costs and Anticipated Technology Advancements. Determines the cost breakdown of offshore wind plants and identifies technical trends and anticipated advancements in offshore wind manufacturing and construction. » Chapter 2: Potential Supply Chain Requirements and Opportunities. Provides an organized, analytical approach to identifying and bounding the uncertainties associated with a future U.S. offshore wind market. It projects potential component-level supply chain needs under three demand scenarios and identifies key supply chain challenges and opportunities facing the future U.S. market as well as current suppliers of the nation’s land-based wind market. » Chapter 3: Strategy for Future Development. Evaluates the gap or competitive advantage of adding manufacturing capacity in the U.S. vs. overseas, and evaluates examples of policies that have been successful . » Chapter 4: Pathways for Market Entry. Identifies technical and business pathways for market entry by potential suppliers of large-scale offshore turbine components and technical services. The report is intended for use by the following industry stakeholder groups: (a) Industry participants who seek baseline cost and supplier information for key component segments and the overall U.S. offshore wind market (Chapters 1 and 2). The component-level requirements and opportunities presented in Section 2.3 will be particularly useful in identifying market sizes, competition, and risks for the various component segments. (b) Federal, state, and local policymakers and economic development agencies, to assist in identifying policies with low effort and high impact (Chapter 3). Section 3.3 provides specific policy examples that have been demonstrated to be effective in removing barriers to development. (c) Current and potential domestic suppliers in the offshore wind market, in evaluating areas of opportunity and understanding requirements for participation (Chapter 4). Section 4.4 provides a step-by-step description of the qualification process that suppliers looking to sell components into a future U.S. offshore wind market will need to follow.

  15. Unusual earthquake sequence at offshore Boryeong, Korea

    NASA Astrophysics Data System (ADS)

    Cho, H.; Shin, J.

    2013-12-01

    An unusual earthquake sequence starts to occur on June 4, 2013 at offshore area of which distance about 40 km to the west of Boryeong, Korea. This sequence lasts for two months and is very unusual case regarding current seismic activity in Korea. Korea Institute of Geoscience and Mineral Resources (KIGAM) catalog lists 144 events of the sequence with the magnitude range of ML 1.2 to 3.8, whereas Korea Meteorological Agency (KMA) catalog assigned 93 events the magnitude range of ML 0.7 to 3.5. The sequence consists of small repeating clusters over 20 km by 10 km area instead of a large mainshock preceding a series of small aftershocks. The hypocenter locations of the events are relocated by double-difference algorithm to identify potential caustic fault. Focal mechanism of the largest event ML 3.8 on 12 July show predominant strike-slip faulting and P-axis is horizontal ENE-WSW direction. The solution is compatible to the direction of main stress field in and around the Korean peninsula.

  16. Data warehouse manages offshore project information

    SciTech Connect

    NONE

    1998-05-04

    A data warehouse adopted from the POSC/Caesar data model will manage the life-cycle information for the offshore Norway Aasgard project. The Aasgard project comprises the Midgard, Smorbukk, and Smorbukk South fields, which lie in 780--985 ft of water. A semisubmersible production facility will handle gas exports, scheduled to begin in 2000. Statoil estimates that recoverable reserves in the fields are 7.5 tcf of gas and 780 million bbl of oil. Notia software components include: the Intergraph asset and information management (AIM) product; the P/C PDM and P/C RDL models; a data mapping, translation, and import toolkit; the application programming interface (API); and query and browser clients. Intergraph describes AIM, with its object management framework (OMF) from metaphase technology, as the engine upon which Notia is based. The P/C PDM defines the data terminology and structure. A dictionary of standard petrochemical data items, the P/C RDL, defines the various activities, materials, components, and relationships among these items. The API allows users to develop additional functionality, and the toolkit provides resources for translating and mapping data from existing sources into a neutral format so that administrators can prepopulate the data warehouse. A worldwide web browser client allows users to query the data warehouse and display results in a variety of configurable formats, including virtual data sheets.

  17. Ubarana Oil Field, offshore Brazil: case history

    SciTech Connect

    Chagas, L.S.; Stringhini, A.V.; Gontijo, J.E.

    1981-05-01

    Ubarana is the first commercial oil field on the northern continental shelf of Brazil. Discovery well No. 1-RNS-3, drilled in 1973, was located on a seismic structural high in the offshore extension of the Potiguar Basin, about 13 km from the coast and 160 km northwest of Natal. The well penetrated oil-bearing, fluvio-deltaic sandstones of the Cretaceous acu formation. Five outpost wells, also located on the mapping of seismic horizons adjacent to the producing interval, helped to extend the limits of the accumulation. A total of 1.4 million cu m of oil has been produced between 1976 and Oct. 1980. The surface area of Ubarana Field is approximately 35 sq km with oil-bearing reservoirs at an average depth of approximately 2400 m. Permeability and porosity of the sandstones generally are poor. Pressure is normal and the main production mechanism is solution gas drive. The volume of oil in place is approximately 37 million cu m; estimated recovery factor is 29%. There are presently 4 platforms in the Ubarana Field active in drilling and production with 32 producing wells, and 14 locations to be drilled.

  18. Exploration and development offshore southern Vietnam

    SciTech Connect

    Ferguson, A.M. (BP, Hanoi (Viet Nam))

    1996-01-01

    In Vietnam, the major focus of the oil and gas industry is on the Nam Con Son and Cuu Long Basins in the southern offshore area. Major licensing first occurred here in the early 1970s. Some exploration was also undertaken by foreign companies in the early 1980s. In 1981, the Soviet Union undertook to assist Vietnam with the development of oil and gas. Vietsovpetro, a joint venture between the then Soviet Oil and Gas Ministry and the Vietnam Oil and Gas Corporation was formed. Most of Vietsovpetro's efforts have been to develop the Bach Ho field in the Cuu Long Basin. This now produces [approximately]130000 bopd. The most recent large scale licensing round occurred in 1992, and, at present, there are over thirty foreign companies active in these Basins' blocks . The first phase of exploration is ending and successes in the Nam Con Son Basin include the BP-led Lan Tay/Lan Do gas discoveries and Pedco's gas discoveries. Mitsubishi's and Petronas' oil discoveries in the Cuu Long Basin have attracted much attention also. The Dai Hung oil field (BHP-operated) has been producing since late 1994. Certain blocks are being appraised, and exploration work is also continuing. Areas of the Cuu Long Basin that were part of Vietsovpetro's acreage, but which may soon be re-licensed, have generated keen interest. The presence of an active upstream industry - exploring, appraising, developing and producing - indicates the emergence of Vietnam as an important East Asian oil and gas player.

  19. Sensitivity Analysis of Offshore Wind Cost of Energy (Poster)

    SciTech Connect

    Dykes, K.; Ning, A.; Graf, P.; Scott, G.; Damiami, R.; Hand, M.; Meadows, R.; Musial, W.; Moriarty, P.; Veers, P.

    2012-10-01

    No matter the source, offshore wind energy plant cost estimates are significantly higher than for land-based projects. For instance, a National Renewable Energy Laboratory (NREL) review on the 2010 cost of wind energy found baseline cost estimates for onshore wind energy systems to be 71 dollars per megawatt-hour ($/MWh), versus 225 $/MWh for offshore systems. There are many ways that innovation can be used to reduce the high costs of offshore wind energy. However, the use of such innovation impacts the cost of energy because of the highly coupled nature of the system. For example, the deployment of multimegawatt turbines can reduce the number of turbines, thereby reducing the operation and maintenance (O&M) costs associated with vessel acquisition and use. On the other hand, larger turbines may require more specialized vessels and infrastructure to perform the same operations, which could result in higher costs. To better understand the full impact of a design decision on offshore wind energy system performance and cost, a system analysis approach is needed. In 2011-2012, NREL began development of a wind energy systems engineering software tool to support offshore wind energy system analysis. The tool combines engineering and cost models to represent an entire offshore wind energy plant and to perform system cost sensitivity analysis and optimization. Initial results were collected by applying the tool to conduct a sensitivity analysis on a baseline offshore wind energy system using 5-MW and 6-MW NREL reference turbines. Results included information on rotor diameter, hub height, power rating, and maximum allowable tip speeds.

  20. Geological characterization of selected offshore sand resources on the OCS, offshore Alabama, for beach nourishment

    USGS Publications Warehouse

    Davies, David J.; Parker, Steven J.; Smith, W. Everett

    1993-01-01

    Most Alabama Gulf and estuarine shoreline is undergoing long-term erosion; threatened shorelines will need programs of replenishment and maintenance if they are to be even temporarily stabilized. Highest priority beach replenishment areas include eastern Dauphin Island; west of Perdido Pass; and west of the inlet at Little Lagoon. There are no appropriate local onshore sand sources available for any such large scale program. Sediments in the Federal waters of the EEZ were evaluated for possible sources of sand for beach nourishment. Six lithofacies were delineated based on sediment characterization, spatial framework, and environment of deposition; of these, two (Clean Sands and Graded Shelly Sands) were deemed to have highest potential as beach nourishment sources. Five offshore target areas were delineated as potential sand sources. Criteria included sand aesthetics, estimated sand volume, and sand distributions. Preliminary environmental analyses included impacts of offshore sand dredging on shelf circulation; on economic activities; and on local benthic biota. Dredging may not significantly alter background wave regimes; however, data are insufficient to model effects of major storms on a modified shelf morphology. Dredging would avoid areas of current economic activity. There would like be little long-term impact on benthic biota in the target areas. Additional work will be required to confirm or refute these preliminary findings.

  1. \\\\server05\\productn\\C\\CJP\\14-1\\CJP102.txt unknown Seq: 1 24-FEB-05 17:48 REGULATING OFFSHORE WIND POWER AND

    E-print Network

    Firestone, Jeremy

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 R A. OFFSHORE AQUACULTURE (MARICULTURE) . . . . . . . . . . . 74 R B. OFFSHORE WIND POWER PRODUCTION . . . . . . . . . . . . . . . 75 R C. POTENTIAL CONNECTIONS AMONG OFFSHORE WIND POWER, MARINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 R A. OFFSHORE WIND POWER IN EUROPE . . . . . . . . . . . . . . . . . 96 R B. BEST PRACTICES

  2. Reciprocal data acquisition and subsequent waveform matching for integrated onshore and offshore seismic profiling

    NASA Astrophysics Data System (ADS)

    Katou, M.; Abe, S.; Saito, H.; Sato, H.; Okaya, D. A.

    2013-12-01

    Seismic reciprocity provides for flexible survey design and effective wavefield reconstruction but with no compensation for complicated phase waveforms for seismic reflection/refraction profiling across the ocean-land transition. For an acquisition across the coast line, there are three types of data: marine-only, land-only and marine-to-land. Because the acquisition styles are different, integrated processing up to full stacking will require seismogram waveform matching. In the meantime, waveform matching processes using full transfer functions often restrict the resulting bandwidth which is strongly affected by the average spectrum of seismic traces within the specified time window for the estimation of matching operator. Therefore, seismic reciprocity should be reexamined under modern waveform matching processes in high-performance surveys that are applied for multi-scale imaging. In this study, two field experiments were conducted for reciprocity at a real marine-to-land transition-zone with various combinations of sources and receivers. The first experiment examined reciprocal marine airgun and land vibrator data. The second experiment examined reciprocal airgun and land explosion data. Because our sources of airgun, vibrator and dynamite generated different wavelets (i.e. source function) and our hydrophone and geophone receivers had different physical characteristics, waveform matching processing was applied to the recorded time-series. In the first experiment, the time-series recorded between an onshore geophone and an offshore airgun source was recorded. The airgun source was a combined array (8 guns) and cluster (6 guns) system where total gun volume was 3020 cubic inches and total chamber pressure was 1400 psi. This was recorded at three onshore observation points that were 2100, 2579 and 2762 m-distances from offshore source point. Next, data between an offshore hydrophone and an onshore vibrator source was acquired. The vibrator source was a 4-vehicles array system and its counter weight was 10 tons per vehicle. The source function was a linear-up sweep function with frequency band of 6 to 40 Hz. The original reciprocal data were not similar. Because we could extract the source wavelets from the data, we applied a waveform matching procedure. Comparison of the processed results showed both waveforms were very harmonious with each other. A similar outcome was observed in the second experiment between seismograms of an onshore geophone recording an offshore airgun and an offshore hydrophone recording an onshore dynamite. For the onshore geophone, subsurface dilation should be traced through a buried array of multi-component geophones for waveform matching. Despite of the long distance (8288 m) between offshore and onshore observation points, refraction and wide-angle reflections were clearly observed. In conclusion, this study demonstrated that seismic reciprocity was observed in this marine-land survey. For wide-angle survey geometries, waveform matching processing improves crustal-scale onshore-offshore seismic profiling. Because our waveform matching method based on using source signatures will preserve the bandwidth of each recorded seismogram and is noise-independent, it is preferable for multi-scale subsurface imaging.

  3. Sanaga Sud field - Offshore Cameroon, west Africa

    SciTech Connect

    Pauken, R.J. (Mobil New Exploration Ventures Co., Dallas, TX (USA))

    1990-09-01

    The Sanaga Sud field, offshore Cameroon, is located just northwest of the coastal town of Kribi in the northern part of the Douala basin. The discovery well, Sanaga Sud A-1, was drilled in 1979 to test an apparent horst block that contained a prominent horizontal seismic amplitude. The Douala basin is one of a series of passive margin basins located along the coastline of central and southern Africa, and formed during the rifting of Africa and South America during the Early Cretaceous. Drilling results showed that the amplitude was a gas/water contact. Two appraisal wells, SSA-2 and SSA-3, were drilled in 1981. All three wells tested gas and condensate. Total recoverable hydrocarbons for the field are estimated to be approximately 1 tcf of gas. The trap in this field is composed of tilted and rotated fault blocks composed of interbedded Aptian to Albian sandstones, siltstones, and shales. The fault blocks were truncated by erosion (breakup unconformity) and later buried by a considerable thickness of onlapping Upper Cretaceous and Tertiary shale. The late Albian erosional unconformity forms the top of the trap over most of the field. Geochemical studies indicate a Lower Cretaceous source for the hydrocarbons. The gross pay thickness averages 250 m with an average porosity of 23% and an average permeability of 142 md. Reservoir lithologies range from well-sorted, massive sandstones to poorly sorted fine sandstones and siltstones containing shaly laminations that are carbonaceous and micaceous. The field is located predominantly in Block PH-38, but part of the field is in the Londji concession. Mobil Producing Cameroon, Inc., is the operator of PH-38 and Total Exploration and Production Cameroon is the operator of the Londji concession.

  4. Exploration and development offshore southern Vietnam

    SciTech Connect

    Ferguson, A.M. [BP, Hanoi (Viet Nam)

    1996-12-31

    In Vietnam, the major focus of the oil and gas industry is on the Nam Con Son and Cuu Long Basins in the southern offshore area. Major licensing first occurred here in the early 1970s. Some exploration was also undertaken by foreign companies in the early 1980s. In 1981, the Soviet Union undertook to assist Vietnam with the development of oil and gas. Vietsovpetro, a joint venture between the then Soviet Oil and Gas Ministry and the Vietnam Oil and Gas Corporation was formed. Most of Vietsovpetro`s efforts have been to develop the Bach Ho field in the Cuu Long Basin. This now produces {approximately}130000 bopd. The most recent large scale licensing round occurred in 1992, and, at present, there are over thirty foreign companies active in these Basins` blocks . The first phase of exploration is ending and successes in the Nam Con Son Basin include the BP-led Lan Tay/Lan Do gas discoveries and Pedco`s gas discoveries. Mitsubishi`s and Petronas` oil discoveries in the Cuu Long Basin have attracted much attention also. The Dai Hung oil field (BHP-operated) has been producing since late 1994. Certain blocks are being appraised, and exploration work is also continuing. Areas of the Cuu Long Basin that were part of Vietsovpetro`s acreage, but which may soon be re-licensed, have generated keen interest. The presence of an active upstream industry - exploring, appraising, developing and producing - indicates the emergence of Vietnam as an important East Asian oil and gas player.

  5. Building the Hibernia: Newfoundland's huge offshore platform

    SciTech Connect

    Irving, B.

    1994-10-01

    It seems most of the world is cooperating in the construction of one of the largest offshore oil platforms ever built. Steels are coming into Newfoundland, where final assembly is being conducted, from Belgium, Italy, Germany; stainless steels from Sweden; and titanium from the US. Welding electrodes are being shipped in from Montreal, from Holland, even from Cleveland. The objective is to tap the 615 million barrels (bbl) of oil that lie in the Hibernia field on the Grand Banks, some 195 miles (315 km) east southeast of St. John's, Newfoundland. Actual welding is going on in numerous locations. Although the platform is a concrete base structure, 37,000 metric tons of structural steel is being welded in order to complete the topsides assembly. In charge of all construction work is the Hibernia Management and Development Co., Ltd. (HMDC), an operating company formed by the four owner companies. The topsides segment of the Hibernia platform is divided into five major modules. It consists of five super modules and seven topside-mounted structures (TMS). One super module is being built in Bull Arm in Newfoundland. The process module and the living quarters module are being built by Hyundai Heavy Industries, South Korea, while the mud and utility modules are being fabricated by Belleli, s.p.a., Italy. The five super modules and the seven TMS will be brought together in Newfoundland where they will be welded together. All seven of the topside-mounted structures are being fabricated in Newfoundland. The assembled topsides will be towed to the site where they will be mated to the gravity base structure (GBS).

  6. Shift work at a modern offshore drilling rig.

    PubMed

    Rodrigues, V F; Fischer, F M; Brito, M J

    2001-12-01

    The oil and gas exploration and production offshore units are classified as hazardous installations. Work in these facilities is complex, confined and associated with a wide range of risks. The continuous operation is secured by various shift work patterns. The objective of this study was to evaluate how offshore drilling workers perceived shift work at high seas and its impacts on their life and working conditions. The main features of the studied offshore shift work schedules are: long time on board (14 to 28 days), extended shifts (12 hours or more per day), slow rotation (7 to 14 days in the same shift), long sequence of days on the night shift (7 to 14 days in a row) and the extra-long extended journey (18 hours) on shift change and landing days. Interviews revealed a wide range of stressors caused by the offshore shift work, as well as difficulties to conciliate work with family life. It was observed that changes of the family model, leading to role conflicts and social isolation, work in a hazardous environment, perceiving poor sleep when working at night shifts and the imbalance between the expected and actual rewards are the major stressors for the offshore drilling workers. PMID:14564877

  7. Quantifying the hurricane risk to offshore wind turbines.

    PubMed

    Rose, Stephen; Jaramillo, Paulina; Small, Mitchell J; Grossmann, Iris; Apt, Jay

    2012-02-28

    The U.S. Department of Energy has estimated that if the United States is to generate 20% of its electricity from wind, over 50 GW will be required from shallow offshore turbines. Hurricanes are a potential risk to these turbines. Turbine tower buckling has been observed in typhoons, but no offshore wind turbines have yet been built in the United States. We present a probabilistic model to estimate the number of turbines that would be destroyed by hurricanes in an offshore wind farm. We apply this model to estimate the risk to offshore wind farms in four representative locations in the Atlantic and Gulf Coastal waters of the United States. In the most vulnerable areas now being actively considered by developers, nearly half the turbines in a farm are likely to be destroyed in a 20-y period. Reasonable mitigation measures--increasing the design reference wind load, ensuring that the nacelle can be turned into rapidly changing winds, and building most wind plants in the areas with lower risk--can greatly enhance the probability that offshore wind can help to meet the United States' electricity needs. PMID:22331894

  8. Quantifying the hurricane risk to offshore wind turbines

    PubMed Central

    Rose, Stephen; Jaramillo, Paulina; Small, Mitchell J.; Grossmann, Iris; Apt, Jay

    2012-01-01

    The U.S. Department of Energy has estimated that if the United States is to generate 20% of its electricity from wind, over 50 GW will be required from shallow offshore turbines. Hurricanes are a potential risk to these turbines. Turbine tower buckling has been observed in typhoons, but no offshore wind turbines have yet been built in the United States. We present a probabilistic model to estimate the number of turbines that would be destroyed by hurricanes in an offshore wind farm. We apply this model to estimate the risk to offshore wind farms in four representative locations in the Atlantic and Gulf Coastal waters of the United States. In the most vulnerable areas now being actively considered by developers, nearly half the turbines in a farm are likely to be destroyed in a 20-y period. Reasonable mitigation measures—increasing the design reference wind load, ensuring that the nacelle can be turned into rapidly changing winds, and building most wind plants in the areas with lower risk—can greatly enhance the probability that offshore wind can help to meet the United States’ electricity needs. PMID:22331894

  9. Investigation of Wind Turbine Rotor Concepts for Offshore Wind Farms

    NASA Astrophysics Data System (ADS)

    Ceyhan, Özlem; Grasso, Francesco

    2014-06-01

    Current plans in offshore wind energy developments call for further reduction of cost of energy. In order to contribute to this goal, several wind turbine rotor concepts have been investigated. Assuming the future offshore wind turbines will operate only in the offshore wind farms, the rotor concepts are not only evaluated for their stand-alone performances and their potential in reducing the loads, but also for their performance in an offshore wind farm. In order to do that, the 10MW reference wind turbine designed in Innwind.EU project is chosen as baseline. Several rotor parameters have been modified and their influences are investigated for offshore wind turbine design purposes. This investigation is carried out as a conceptual parametrical study. All concepts are evaluated numerically with BOT (Blade optimisation tool) software in wind turbine level and with Farmflow software in wind farm level for two wind farm layouts. At the end, all these concepts are compared with each other in terms of their advantages and disadvantages.

  10. Globalization of environmental regulations for offshore E & P operations

    SciTech Connect

    Shannon, B.E.

    1995-12-31

    One of the enduring legacies of the Rio Environmental Summit of 1992 (United Nations Conference on Environment and Development, UNCED) is Agenda 21 (Chapter 17 - Protection of the Oceans), which among other things called for the assessment of the need for a global authority to regulate offshore Exploration & Production (E&P) discharges, emissions and safety. Despite advice to the contrary from the International Maritime Organization (IMO), interest is building within the European community for the standardization of regulations for offshore E&P activities. Several international of regulations for offshore E&P activities. Several international frameworks or forums have been mentioned as possible candidates. These include the United Nations Convention on the Law of the Sea, 1982 (UNCLOS); London Convention 1972 (LC 1972) and the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 (MARPOL) 73/78. International offshore oil and gas operators operate within requirements of regional conventions under the United Nations Environmental Program`s (UNEP) - Regional Seas Program. Domestic offshore operations are undertaken under the auspices of the U.S. Environmental Protection Agency and Minerals Management Service.

  11. Conventional measurement data: good enough for offshore meteorology?

    NASA Astrophysics Data System (ADS)

    Schmidt, Michael; Tambke, Jens; Steinfeld, Gerald; Heinemann, Detlev

    2014-05-01

    The analysis of marine boundary layer properties is an fundamental task of energy meteorology. The determination of atmospheric stability and momentum fluxes out of measurement data is, for example, important for the validation of mesoscale models such as WRF and COSMO, but also for the validation of microscale models like PALM large eddy simulations. From them, major conclusions are drawn for the design of wind turbines and the layout design of entire offshore wind farms with 20 to more than 100 turbines. Up to now, high-resolution measurements of the vertical wind are usually carried out with sonic anemometers, which are known to provide simultaneously (sound-) temperature signals. Recent investigations of data from different met masts in the North Sea have revealed errors now, which can be corrected only partially. A method will be shown for visualization of a sonic anemometers influence on the mean vertical wind speed and how it can be adjusted. Another sonic anemometer dysfunction, the striking, not by meteorology explainable underestimation of vertical wind events for lots of fine wind direction segments can only be demonstrated so far, but not explained or actually corrected. The quality of sonic anemometer measurements of mean temperatures is proved to be poor to mediocre - depending on the type of the device. Furthermore, there is no evidence about the quality of the high-frequency temperature fluctuation measurements, simply because comparative measurements are missing. Temperature measurements with sonic anemometers under controlled laboratory conditions and comparisons with other fast temperature measurements techniques must be performed in order to gain more certainty on this issue. Temperature difference sensors are producing data in agreement with theory. Such a sensor is already installed on a North Sea met mast. Some new temperature difference sensor results will be presented. New methods, especially for high-frequency and high-quality measurements of vertical wind speeds, have to be developed in the very near future for serving the high and increasing needs of modelers.

  12. Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    McMillen, K.J. (Beaver Creek Tech. Co., Mason, TX (United States)); Do Van Luu; Lee, E.K.; Hong, S.S. (PEDCO, Ho Chi Minh City (Viet Nam))

    1996-01-01

    An integrated well log, biostratigraphic, and seismic stratigraphic study of Miocene to Recent deltaic sediments deposited in the Nam Con Son Basin offshore from southern Vietnam shows the influence of eustacy and tectonics on sequence development. Sediments consist of Oligocene non-marine rift-basin fill (Cau Formation), early to middle Miocene tide-dominated delta plain to delta front sediments (TB 1.5 to TB 2.5, Due and Thong Formations), and late Miocene to Recent marine shelf sediments (TB. 2.6 to TB 3.1 0, Mang Cau, Nam Con Son, and Bien Dong Formations). Eustacy controlled the timing of key surfaces and sand distribution in the tectonically-quiet early Miocene. Tectonic effects on middle to late Miocene sequence development consist of thick transgressive systems tracts due to basin-wide subsidence and transgression, sand distribution in the basin center, and carbonate sedimentation on isolated fault blocks within the basin. Third-order sequence boundaries (SB) are identified by spore peaks, sand stacking patterns, and channel incision. In the basin center, widespread shale beds with coal occur above sequence boundaries followed by transgressive sandstone units. These TST sandstones merge toward the basin margin where they lie on older HST sandstones. Maximum flooding surfaces (MFS) have abundant marine microfossils and mangrove pollen, a change in sand stacking pattern, and often a strong seismic reflection with downlap. Fourth-order genetic-type sequences are also interpreted. The MFS is the easiest marker to identify and correlate on well logs. Fourth-order SB occur within these genetic units but are harder to identify and correlate.

  13. Neogene sequence stratigraphy, Nam Con Son Basin, offshore Vietnam

    SciTech Connect

    McMillen, K.J. [Beaver Creek Tech. Co., Mason, TX (United States); Do Van Luu; Lee, E.K.; Hong, S.S. [PEDCO, Ho Chi Minh City (Viet Nam)

    1996-12-31

    An integrated well log, biostratigraphic, and seismic stratigraphic study of Miocene to Recent deltaic sediments deposited in the Nam Con Son Basin offshore from southern Vietnam shows the influence of eustacy and tectonics on sequence development. Sediments consist of Oligocene non-marine rift-basin fill (Cau Formation), early to middle Miocene tide-dominated delta plain to delta front sediments (TB 1.5 to TB 2.5, Due and Thong Formations), and late Miocene to Recent marine shelf sediments (TB. 2.6 to TB 3.1 0, Mang Cau, Nam Con Son, and Bien Dong Formations). Eustacy controlled the timing of key surfaces and sand distribution in the tectonically-quiet early Miocene. Tectonic effects on middle to late Miocene sequence development consist of thick transgressive systems tracts due to basin-wide subsidence and transgression, sand distribution in the basin center, and carbonate sedimentation on isolated fault blocks within the basin. Third-order sequence boundaries (SB) are identified by spore peaks, sand stacking patterns, and channel incision. In the basin center, widespread shale beds with coal occur above sequence boundaries followed by transgressive sandstone units. These TST sandstones merge toward the basin margin where they lie on older HST sandstones. Maximum flooding surfaces (MFS) have abundant marine microfossils and mangrove pollen, a change in sand stacking pattern, and often a strong seismic reflection with downlap. Fourth-order genetic-type sequences are also interpreted. The MFS is the easiest marker to identify and correlate on well logs. Fourth-order SB occur within these genetic units but are harder to identify and correlate.

  14. Federal offshore statistics: 1992. Leasing, exploration, production, and revenues as of December 31, 1992

    SciTech Connect

    Francois, D.K.

    1993-12-31

    The Outer Continental Shelf Lands Act, enacted in 1953 and amended several times, charges the Secretary of the Interior with the responsibility for administering and managing mineral exploration and development of the outer continental shelf, as well as for conserving its natural resources. This report documents the following: Federal offshore lands; offshore leasing activity and status; offshore development activity; offshore production of crude oil and natural gas; Federal offshore oil and natural gas sales volume and royalties; revenue from Federal offshore leases; disbursement of Federal offshore revenue; reserves and resource estimates of offshore oil and natural gas; oil pollution in US and international waters; and international activities and marine minerals. 11 figs., 83 tabs.

  15. 78 FR 47723 - Information Collection: Forms for Oil Spill Financial Responsibility for Offshore Facilities...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-06

    ...Information Collection: Forms for Oil Spill Financial Responsibility for Offshore...paperwork requirements under 30 CFR 553, Oil Spill Financial Responsibility for Offshore...1010-0106. Title: 30 CFR 553, Oil Spill Financial Responsibility for...

  16. 78 FR 25472 - Information Collection: Oil Spill Financial Responsibility for Offshore Facilities; Proposed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ...1010-0106] Information Collection: Oil Spill Financial Responsibility for Offshore...paperwork requirements for 30 CFR 553, Oil Spill Financial Responsibility for Offshore...1010-0106. Title: 30 CFR Part 553, Oil Spill Financial Responsibility for...

  17. 75 FR 37783 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-30

    ...Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling AGENCY: Department...Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (the Commission...Deepwater Horizon explosion, fire and oil spill and develop options to guard...

  18. 75 FR 21648 - MMS Information Collection Activity: 1010-0106, Oil Spill Financial Responsibility for Offshore...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-26

    ...Collection Activity: 1010-0106, Oil Spill Financial Responsibility for Offshore...regulations under ``30 CFR Part 253, Oil Spill Financial Responsibility for Offshore...INFORMATION: Title: 30 CFR Part 253, Oil Spill Financial Responsibility for...

  19. 40 CFR 112.11 - Spill Prevention, Control, and Countermeasure Plan requirements for offshore oil drilling...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Spill Prevention, Control...requirements for offshore oil drilling, production...Vegetable Oils (Including Oils from Seeds, Nuts, Fruits...Kernels) § 112.11 Spill Prevention, Control...requirements for offshore oil drilling,...

  20. 78 FR 66763 - Information Collection: Oil Spill Financial Responsibility for Offshore Facilities; Submitted for...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-06

    ...MMAA104000] Information Collection: Oil Spill Financial Responsibility for Offshore...paperwork requirements for 30 CFR 553, Oil Spill Financial Responsibility for Offshore...1010-0106. Title: 30 CFR 553, Oil Spill Financial Responsibility for...

  1. 75 FR 39518 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-09

    ...ENERGY National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction AGENCY: Office of...of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, (75 FR 37783). This...

  2. 40 CFR 112.11 - Spill Prevention, Control, and Countermeasure Plan requirements for offshore oil drilling...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Spill Prevention, Control...requirements for offshore oil drilling, production...Vegetable Oils (Including Oils from Seeds, Nuts, Fruits...Kernels) § 112.11 Spill Prevention, Control...requirements for offshore oil drilling,...

  3. Large-Scale Offshore Wind Power in the United States: Executive Summary

    SciTech Connect

    Musial, W.; Ram, B.

    2010-09-01

    This document provides a summary of a 236-page NREL report that provides a broad understanding of today's offshore wind industry, the offshore wind resource, and the associated technology challenges, economics, permitting procedures, and potential risks and benefits.

  4. 33 CFR 334.905 - Pacific Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area. 334...Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area. (a...the Pacific Ocean, San Diego County, California. The center of the restricted area...

  5. 33 CFR 334.905 - Pacific Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area. 334...Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area. (a...the Pacific Ocean, San Diego County, California. The center of the restricted area...

  6. Development of Offshore Wind Recommended Practice for U.S. Waters: Preprint

    SciTech Connect

    Musial, W. D.; Sheppard, R. E.; Dolan, D.; Naughton, B.

    2013-04-01

    This paper discusses how the American Petroleum Institute oil and gas standards were interfaced with International Electrotechnical Commission and other wind turbine and offshore industry standards to provide guidance for reliable engineering design practices for offshore wind energy systems.

  7. 76 FR 14681 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Massachusetts...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-17

    ...BOEM-2010-0063] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS...for Interest (RFI) in Commercial Wind Energy Leasing Offshore Massachusetts...comment period on the RFI in Commercial Wind Energy Leasing Offshore...

  8. Evidence of offshore lake trout reproduction in Lake Huron

    USGS Publications Warehouse

    DeSorcie, Timothy J.; Bowen, Charles A., II

    2003-01-01

    Six Fathom Bank-Yankee Reef, an offshore reef complex, was an historically important spawning area believed to represent some of the best habitat for the rehabilitation of lake trout Salvelinus namaycush in Lake Huron. Since 1986, lake trout have been stocked on these offshore reefs to reestablish self-sustaining populations. We sampled with beam trawls to determine the abundance of naturally reproduced age-0 lake trout on these offshore reefs during May-July in 1994-1998 and 2000-2002. In total, 123 naturally reproduced lake trout fry were caught at Six Fathom Bank, and 2 naturally reproduced lake trout fry were caught at nearby Yankee Reef. Our findings suggest that this region of Lake Huron contains suitable habitat for lake trout spawning and offers hope that lake trout rehabilitation can be achieved in the main basin of Lake Huron.

  9. In Brief: Environmental standards needed for offshore marine aquaculture

    NASA Astrophysics Data System (ADS)

    Zielinski, Sarah

    2007-01-01

    The U.S. Congress should enact legislation that sets strong environmental standards for offshore marine aquaculture, the Marine Aquaculture Task Force recommended in a recent report. Aquaculture now accounts for about half of all seafood consumed in the world, and the industry is rapidly growing and expanding into regions offshore (more than 3 nautical miles from the coast) that are controlled by the federal government. The task force, which was organized by researchers from the Woods Hole Oceanographic Institution, examined the risks and benefits of marine aquaculture. They proposed that the U.S. National Oceanic and Atmospheric Administration be appointed the lead agency responsible for regulation of offshore marine aquaculture and for providing incentives for research and development. The main environmental standard proposed by the task force was to limit farming only to native species with local genetics unless the potential harm of escaped fish to local populations would be negligible.

  10. Thermodynamic design of natural gas liquefaction cycles for offshore application

    NASA Astrophysics Data System (ADS)

    Chang, Ho-Myung; Lim, Hye Su; Choe, Kun Hyung

    2014-09-01

    A thermodynamic study is carried out for natural gas liquefaction cycles applicable to offshore floating plants, as partial efforts of an ongoing governmental project in Korea. For offshore liquefaction, the most suitable cycle may be different from the on-land LNG processes under operation, because compactness and simple operation are important as well as thermodynamic efficiency. As a turbine-based cycle, closed Claude cycle is proposed to use NG (natural gas) itself as refrigerant. The optimal condition for NG Claude cycle is determined with a process simulator (Aspen HYSYS), and the results are compared with fully-developed C3-MR (propane pre-cooled mixed refrigerant) JT cycles and various N2 (nitrogen) Brayton cycles in terms of efficiency and compactness. The newly proposed NG Claude cycle could be a good candidate for offshore LNG processes.

  11. OCD: The offshore and coastal dispersion model. Volume 2. Appendices

    SciTech Connect

    DiCristofaro, D.C.; Hanna, S.R.

    1989-11-01

    The Offshore and Coastal Dispersion (OCD) Model has been developed to simulate the effect of offshore emissions from point, area, or line sources on the air quality of coastal regions. The OCD model was adapted from the EPA guideline model MPTER (EPA, 1980). Modifications were made to incorporate overwater plume transport and dispersion as well as changes that occur as the plume crosses the shoreline. This is a revised OCD model, the fourth version to date. The volume is an appendices for the OCD documentation, included are three appendices: Appendix A the OCD computer program, Appendix B an Analysis Post-processor, Appendix C Offshore Meteorological data Collection Instrumentation, also included are general References.

  12. Acoustic emission of offshore structures, attenuation - noise - crack monitoring

    SciTech Connect

    Lovaas, S.

    1985-01-01

    No NDT crack detection methods have up to now proved to be the method which can overrule the others. We shall probably in the future in the offshore industry see a combination of various structure monitoring systems, remotely operated vehicles (ROV) with NDT-equipment and also the use of divers. The author believes that in some 5 - 10 years ROVs will perform much of the routine inspection, and mobile monitoring instrumentation will be concentrated to some hot spot areas, already detected defects or any repairs. The main areas for AE are monitoring of pressure vessels and fibre reinforced plastics. For application on offshore structures some fullscale trials have been performed (with practical problems) as well as some laboratory studies. Norwegian institutions seem to have a leading role today in the research of offshore applications. Norsk Hydro participated in a signature analysis project at Sintef/Veritas some years ago.

  13. Lower cost offshore field development utilizing autonomous vehicles

    SciTech Connect

    Frisbie, F.R.; Vie, K.J.; Welch, D.W.

    1996-12-31

    The offshore oil and gas industry has the requirement to inspect offshore oil and gas pipelines for scour, corrosion and damage as well as inspect and intervene on satellite production facilities. This task is currently performed with Remotely Operated Vehicles (ROV) operated from dynamically positioned (DP) offshore supply or diving support boats. Currently, these tasks are expensive due to the high day rates for DP ships and the slow, umbilical impeded, 1 knot inspection rates of the tethered ROVs, Emerging Autonomous Undersea Vehicle (AUV) technologies offer opportunities to perform these same inspection tasks for 50--75% lower cost, with comparable or improved quality. The new generation LAPV (Linked Autonomous Power Vehicles) will operate from fixed facilities such as TLPs or FPFs and cover an operating field 10 kms in diameter.

  14. Inner-shelf circulation and sediment dynamics on a series of shoreface-connected ridges offshore of Fire Island, NY

    NASA Astrophysics Data System (ADS)

    Warner, John C.; List, Jeffrey H.; Schwab, William C.; Voulgaris, George; Armstrong, Brandy; Marshall, Nicole

    2014-12-01

    Locations along the inner-continental shelf offshore of Fire Island, NY, are characterized by a series of shoreface-connected ridges (SFCRs). These sand ridges have approximate dimensions of 10 km in length, 3 km spacing, and up to ˜8 m ridge to trough relief and are oriented obliquely at approximately 30° clockwise from the coastline. Stability analysis from previous studies explains how sand ridges such as these could be formed and maintained by storm-driven flows directed alongshore with a key maintenance mechanism of offshore deflected flows over ridge crests and onshore in the troughs. We examine these processes both with a limited set of idealized numerical simulations and analysis of observational data. Model results confirm that alongshore flows over the SFCRs exhibit offshore veering of currents over the ridge crests and onshore-directed flows in the troughs, and demonstrate the opposite circulation pattern for a reverse wind. To further investigate these maintenance processes, oceanographic instruments were deployed at seven sites on the SFCRs offshore of Fire Island to measure water levels, ocean currents, waves, suspended sediment concentrations, and bottom stresses from January to April 2012. Data analysis reveals that during storms with winds from the northeast, the processes of offshore deflection of currents over ridge crests and onshore in the troughs were observed, and during storm events with winds from the southwest, a reverse flow pattern over the ridges occurred. Computations of suspended sediment fluxes identify periods that are consistent with SFCR maintenance mechanisms. Alongshore winds from the northeast drove fluxes offshore on the ridge crest and onshore in the trough that would tend to promote ridge maintenance. However, alongshore winds from the southwest drove opposite circulations. The wind fields are related to different storm types that occur in the region (low-pressure systems, cold fronts, and warm fronts). From the limited data set, we identify that low-pressure systems drive sediment fluxes that tend to promote stability and maintain the SFCRs while cold front type storms appear to drive circulations that are in the opposite sense and may not be a supporting mechanism for ridge maintenance.

  15. Review of technology for Arctic offshore oil and gas recovery

    SciTech Connect

    Sackinger, W. M.

    1980-08-01

    The technical background briefing report is the first step in the preparation of a plan for engineering research oriented toward Arctic offshore oil and gas recovery. A five-year leasing schedule for the ice-prone waters of the Arctic offshore is presented, which also shows the projected dates of the lease sale for each area. The estimated peak production rates for these areas are given. There is considerable uncertainty for all these production estimates, since no exploratory drilling has yet taken place. A flow chart is presented which relates the special Arctic factors, such as ice and permafrost, to the normal petroleum production sequence. Some highlights from the chart and from the technical review are: (1) in many Arctic offshore locations the movement of sea ice causes major lateral forces on offshore structures, which are much greater than wave forces; (2) spray ice buildup on structures, ships and aircraft will be considerable, and must be prevented or accommodated with special designs; (3) the time available for summer exploratory drilling, and for deployment of permanent production structures, is limited by the return of the pack ice. This time may be extended by ice-breaking vessels in some cases; (4) during production, icebreaking workboats will service the offshore platforms in most areas throughout the year; (5) transportation of petroleum by icebreaking tankers from offshore tanker loading points is a highly probable situation, except in the Alaskan Beaufort; and (6) Arctic pipelines must contend with permafrost, making instrumentation necessary to detect subtle changes of the pipe before rupture occurs.

  16. Offshore Renewable Energy R&D (Fact Sheet)

    SciTech Connect

    Not Available

    2011-10-01

    This fact sheet describes the offshore renewable energy R&D efforts at NREL's NWTC. As the United States increases its efforts to tap the domestic energy sources needed to diversify its energy portfolio and secure its energy supply, more attention is being focused on the rich renewable resources located offshore. Offshore renewable energy sources include offshore wind, waves, tidal currents, ocean and river currents, and ocean thermal gradients. According to a report published by the National Renewable Energy Laboratory (NREL) in 2010,1 U.S. offshore wind resources have a gross potential generating capacity four times greater than the nation's present electric capacity, and the Electric Power Research Institute estimates that the nation's ocean energy resources could ultimately supply at least 10% of its electric supply. For more than 30 years, NREL has advanced the science of renewable energy while building the capabilities to guide rapid deployment of commercial applications. Since 1993, NREL's National Wind Technology Center (NWTC) has been the nation's premier wind energy research facility, specializing in the advancement of wind technologies that range in size from a kilowatt to several megawatts. For more than 8 years, the NWTC has been an international leader in the field of offshore floating wind system analysis. Today, researchers at the NWTC are taking their decades of experience and extensive capabilities and applying them to help industry develop cost-effective hydrokinetic systems that convert the kinetic energy in water to provide power for our nation's heavily populated coastal regions. The center's capabilities and experience cover a wide spectrum of wind and water energy engineering disciplines, including atmospheric and ocean fluid mechanics, aerodynamics; aeroacoustics, hydrodynamics, structural dynamics, control systems, electrical systems, and testing.

  17. Brazil`s offshore potential extends beyond the Campos basin

    SciTech Connect

    Becker, R.G. [Gustavson Associates Inc., Boulder, CO (United States)

    1996-01-08

    This paper briefly reviews the distribution of oil and gas basins in Brazil and the percentage of offshore versus onshore sites. It reviews the exploration and development history of the industry and the historical production and reserves estimates. The paper goes on to review the geopolitical aspects of oil and gas in the region which is primarily a state-owned industry. It analyzes the market conditions which are creating pressures to allow competition within the oil and gas industry in Brazil. Finally, the paper provides a geologic analysis of the various offshore basins and the resource potential of these basins.

  18. Foam pigs solve pipe cleaning problems offshore Brazil

    SciTech Connect

    Lima, P.C.R.; Neto, S.J.A. [Petroleo Brasileiro S.A., Rio de Janeiro (Brazil)

    1995-10-02

    Pipeline systems in which conventional pigs cannot be run are common in such complex offshore installations as are found in Brazil`s Campos basin. These systems may contain changing pipe diameters or wet christmas trees and manifolds. A new concept for using low cost, low-density foam pigs for both liquid removal in wet-gas pipelines and paraffin removal in oil and multiphase pipelines has been successfully tested offshore Brazil. Although the present discussion focuses on condensate and paraffin removal in pipelines, the principles can be applied to several kinds of operations including general pipeline cleaning, product removal or separation in pipeline, corrosion evaluation, and chemical product application.

  19. California State Waters Map Series: offshore of Refugio Beach, California

    USGS Publications Warehouse

    Johnson, Samuel Y.; Dartnell, Peter; Cochrane, Guy R.; Golden, Nadine E.; Phillips, Eleyne L.; Ritchie, Andrew C.; Krigsman, Lisa M.; Dieter, Bryan E.; Conrad, James E.; Greene, H. Gary; Seitz, Gordon G.; Endris, Charles A.; Sliter, Ray W.; Wong, Florence L.; Erdey, Mercedes D.; Gutierrez, Carlos I.; Yoklavich, Mary M.; East, Amy E.; Hart, Patrick E.

    2015-01-01

    The offshore part of the map area consists of relatively flat and shallow continental shelf, which dips gently seaward (about 0.8° to 1.0°) so that water depths at the shelf break, roughly coincident with the California’s State Waters limit, are about 80 to 100 m. This part of the Santa Barbara Channel is relatively well protected from large Pacific swells from the north and northwest by Point Conception and from the south and southwest by offshore islands and banks. The shelf is underlain by variable amounts of upper Quaternary marine and fluvial sed

  20. Offshore and coastal dispersion (OCD) model. Users guide

    SciTech Connect

    Hanna, S.R.; Schulman, L.L.; Paine, R.J.; Pleim, J.E.

    1984-09-01

    The Offshore and Coastal Dispersion (OCD) model was adapted from the EPA guideline model MPTER to simulate the effect of offshore emissions from point sources in coastal regions. Modifications were made to incorporate overwater plume transport and dispersion as well as changes that occur as the plume crosses the shoreline. Hourly meteorological data are needed from overwater and overland locations. Turbulence intensities are used but are not mandatory. For overwater dispersion, the turbulence intensities are parameterized from boundary-layer similarity relationships if they are not measured. Specifications of emission characteristics and receptor locations are the same as for MPTER; 250 point sources and 180 receptors may be used.

  1. Offshore and coastal dispersion (OCD) model. User's guide

    SciTech Connect

    Hanna, S.R.; Schulman, L.L.; Paine, R.J.; Pleim, J.E.

    1984-09-01

    The Offshore Coastal Dispersion (OCD) model was adapted from the EPA guideline model MPTER to simulate the effect of offshore emissions from point sources in coastal regions. Modifications were made to incorporate overwater plume transport and dispersion as well as changes that occur as the plume crosses the shoreline. Hourly meteorological data are needed from overwater and overland locations. For overwater dispersion, the turbulence intensities are parameterized from boundary layer similarity relationships if they are not measured. A virtual source technique is used to change the rate of plume growth as the overwater plume intercepts the overland internal boundary layer.

  2. Nonlinear stochastic approach to relative motion for offshore structures

    E-print Network

    Sandt, Eric William

    1985-01-01

    of relat. ive motion on two ri sers at several water depths of practical i nterest. The mari ne ri ser s were modelled us i ng a pin-pi nned boundary condi ti on. Being a more flexible structure, a marine riser should be more susceptible to the effects... Chairman Of Advisory Committee: Dr. John M. Niedzwecki As offshore industry moves into deepwater areas, the linear analysis of an offshore structure becomes suspect. The structure becomes flexible and the structural response due to the forces creating a...

  3. Structural option design in JZ20-2 offshore project

    SciTech Connect

    Wang Lianqi [COODEC, Beijing (China)

    1993-12-31

    In the JZ20-2 Project, ice and earthquakes are the main loads which determine the member sizes of offshore structures. UQ and W platforms are located at same field. The vertical loads of an UQ platform are about two times as much as a W platform, but structural steel weight used by two platforms is about the same. This paper describes the results to be acquired and how to determine reasonably the standard of ice load and the resistance to earthquakes with less stiffness and large mass. This paper presents some useful principles and enlightenment for offshore engineering.

  4. Troll: Norway's giant offshore gas field

    SciTech Connect

    Bolle, L.; Henningfeld, H. (Shell Norsk A.S., Tananger (Norway))

    1990-09-01

    Troll, a giant gas field underlain by an oil rim of variable thickness, is located around 80 km offshore Norway on the northwestern edge of the Horda Platform and adjacent to the eastern margin of the Viking Graben in waters between 300 and 355 m deep. The field extends over four Norwegian Blocks (31/2, 31/3, 31/5, and 31/6) and covers an area of 710 km{sup 2}. Hydrocarbons are trapped in three easterly tilted fault blocks capped by Upper Jurassic to Paleocene clays. The reservoir comprises sediments of the Fensfjord, middle Heather, Sognefjord, and upper Heather formations of the Jurassic Viking Group. Deposition took place as a cyclic shallow-marine sandstone sequence with alternations of transgressive sands and silts and progradational shoreface facies induced by regional sea level fluctuations. The field is split into three communicating hydrocarbon provinces, which coincide with the major fault blocks. In Troll East, a gas cap of up to 250 m overlies a 0-4-m-thin oil rim. In Troll West gas, a maximum gas cap of 210 m covers an oil rim of some 12 m thickness. In Troll West oil, a modest gas column of 43 m caps up to 28 m of oil. The reservoir rock exhibits excellent properties With porosities up to 35%, permeabilities up in the darcy range, and no shale interbeddings. Since the discovery in 1979, 25 exploration and appraisal wells delineated initial in place volumes of 1670 {times} 10{sup 9} Sm{sup 3} free gas and 615 {times} 10{sup 6} m{sup 3} Oil. The field development envisages exploitation of the main gas accumulation in Troll East from a concrete gravity structure as phase one with first gas planned for 1996. Successive development of Troll West Oil could require subsea completions on horizontal wells feeding a floating production platform. The independent Troll-Oseberg gas injection scheme will export first gas in 1991 from a subsea six-slot template located in the south of Troll East for injection in the Oseberg field.

  5. A conceptual framework and practical guide for assessing fitness-to-operate in the offshore oil and gas industry.

    PubMed

    Griffin, Mark A; Hodkiewicz, Melinda R; Dunster, Jeremy; Kanse, Lisette; Parkes, Katharine R; Finnerty, Dannielle; Cordery, John L; Unsworth, Kerrie L

    2014-07-01

    The paper outlines a systemic approach to understanding and assessing safety capability in the offshore oil and gas industry. We present a conceptual framework and assessment guide for understanding fitness-to-operate (FTO) that builds a more comprehensive picture of safety capability for regulators and operators of offshore facilities. The FTO framework defines three enabling capitals that create safety capability: organizational capital, social capital, and human capital. For each type of capital we identify more specific dimensions based on current theories of safety, management, and organizational processes. The assessment guide matches specific characteristics to each element of the framework to support assessment of safety capability. The content and scope of the FTO framework enable a more comprehensive coverage of factors that influence short-term and long-term safety outcomes. PMID:24393216

  6. Exploring Flexible Strategies in Engineering Systems Using Screening Models Applications to Offshore Petroleum Projects

    E-print Network

    de Weck, Olivier L.

    to Offshore Petroleum Projects by Jijun Lin B.E., Mechanical Engineering, Beijing University of Aeronautics Flexible Strategies in Engineering Systems Using Screening Models Applications to Offshore Petroleum, such as offshore petroleum exploration and production systems, generally require a significant amount of capital

  7. 33 CFR 334.905 - Pacific Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Pacific Ocean, offshore of Camp Pendleton, California...AREA REGULATIONS § 334.905 Pacific Ocean, offshore of Camp Pendleton, California...offshore of Camp Pendleton in the Pacific Ocean, San Diego County, California. The...

  8. 33 CFR 334.905 - Pacific Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Pacific Ocean, offshore of Camp Pendleton, California...AREA REGULATIONS § 334.905 Pacific Ocean, offshore of Camp Pendleton, California...offshore of Camp Pendleton in the Pacific Ocean, San Diego County, California. The...

  9. 33 CFR 334.905 - Pacific Ocean, offshore of Camp Pendleton, California; Fallbrook restricted area.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Pacific Ocean, offshore of Camp Pendleton, California...AREA REGULATIONS § 334.905 Pacific Ocean, offshore of Camp Pendleton, California...offshore of Camp Pendleton in the Pacific Ocean, San Diego County, California. The...

  10. Photoresponses of larval Atlantic menhaden ( Brevoortia tyrannus Latrobe) in offshore and estuarine waters: implications for transport

    Microsoft Academic Search

    Richard B. Forward; John S. Burke; Daniel Rittschof; James M. Welch

    1996-01-01

    This study tested the hypothesis that Atlantic menhaden (Brevoortia tyrannus Latrobe) larvae have separate behaviors in offshore and estuarine waters that are evoked by chemical cues in these waters. Atlantic menhaden spawn offshore, and larvae are transported shoreward where they metamorphose after entering estuaries. Field studies suggest that during the day larvae are at moderate depths offshore and less abundant

  11. 75 FR 17755 - Certificate of Alternative Compliance for the Offshore Supply Vessel GULF TIGER

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-07

    ...Compliance for the Offshore Supply Vessel GULF TIGER AGENCY: Coast Guard, DHS. ACTION: Notice...issued for the offshore supply vessel GULF TIGER as required by 33 U.S.C. 1605(c...issued for the h offshore supply vessel GULF TIGER. Full compliance with 72 COLREGS and...

  12. Three-Dimensional Seismic Study of Pluton Emplacement, Offshore Northwestern New Zealand

    E-print Network

    Seamons, Kent E.

    Three-Dimensional Seismic Study of Pluton Emplacement, Offshore Northwestern New Zealand Jason A Emplacement, Offshore Northwestern New Zealand Jason A. Luke Department of Geological Sciences Master of Science Detailed 3D seismic images of a volcano-plutonic complex offshore northwestern New Zealand

  13. 75 FR 17755 - Certificate of Alternative Compliance for the Offshore Supply Vessel C-ATLAS

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-07

    ...Compliance for the Offshore Supply Vessel C-ATLAS AGENCY: Coast Guard, DHS. ACTION: Notice...issued for the offshore supply vessel C-ATLAS as required by 33 U.S.C. 1605(c...issued for the offshore supply vessel C-ATLAS. Full compliance with 72 COLREGS and...

  14. BIOLOGY OF OFFSHORE HAKE, MERLUCCIUS ALBIDUS, IN THE GULF OF MEXICO!

    E-print Network

    BIOLOGY OF OFFSHORE HAKE, MERLUCCIUS ALBIDUS, IN THE GULF OF MEXICO! BENNIE A. ROHR AND ELMER J. GUTHERZ2 ABSTRACT Biological data of the offshore hake, Merluccius albidus, in the Gulf of MexicoM. albidus suggests that offshore hake do not move far off the bottom in pursuit of prey. Density estimates

  15. 75 FR 26783 - Certificate of Alternative Compliance for the Offshore Supply Vessel JOSHUA CANDIES

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-12

    ...for the Offshore Supply Vessel JOSHUA CANDIES AGENCY: Coast Guard, DHS. ACTION...for the offshore supply vessel JOSHUA CANDIES as required by 33 U.S.C. 1605(c...for the offshore supply vessel JOSHUA CANDIES, O.N. 1219732. Full compliance...

  16. 75 FR 26783 - Certificate of Alternative Compliance for the Offshore Supply Vessel PEYTON CANDIES

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-12

    ...for the Offshore Supply Vessel PEYTON CANDIES AGENCY: Coast Guard, DHS. ACTION...for the offshore supply vessel PEYTON CANDIES as required by 33 U.S.C. 1605(c...for the offshore supply vessel PEYTON CANDIES, O.N. 1219737. Full compliance...

  17. 75 FR 32802 - Certificate of Alternative Compliance for the Offshore Supply Vessel ROSS CANDIES

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-09

    ...Compliance for the Offshore Supply Vessel ROSS CANDIES AGENCY: Coast Guard, DHS. ACTION...issued for the offshore supply vessel ROSS CANDIES as required by 33 U.S.C. 1605(c...issued for the offshore supply vessel ROSS CANDIES, O.N. 1222260. Full compliance...

  18. A joint location and outsourcing sustainability analysis for a strategic offshoring decision

    Microsoft Academic Search

    Yijie Dou; Joseph Sarkis

    2010-01-01

    With economic globalisation and the emergence of extended enterprises derived from interrelationships among organisations, there has been a steady increase in offshore outsourcing activities. Subsequently, the strategic importance of offshoring decisions is important. Traditional offshoring decisions mainly emphasise outsourcee (supplier) selection problems, with their focus upon economic factors. Sustainability, which has recently been regarded as a competitive necessity in most

  19. Moving Cages Further Offshore: Effects on Southern Bluefin Tuna, T. maccoyii, Parasites, Health and Performance

    Microsoft Academic Search

    Nicole T. Kirchhoff; Kirsty M. Rough; Barbara F. Nowak; Howard Browman

    2011-01-01

    The effects of offshore aquaculture on SBT health (particularly parasitic infections and haematology) and performance were the main aim of this study. Two cohorts of ranched Southern Bluefin tuna (SBT) (Thunnus maccoyii) were monitored throughout the commercial season, one maintained in the traditional near shore tuna farming zone and one maintained further offshore. SBT maintained offshore had reduced mortality, increased

  20. Trophic connections in Lake Superior Part I: The offshore fish community

    Microsoft Academic Search

    Allison E. Gamble; Thomas R. Hrabik; Jason D. Stockwell; Daniel L. Yule

    2011-01-01

    Detailed diet linkages within the offshore (>80m bathymetric depth) food web of Lake Superior are currently not well identified. We used analyses of fish stomach contents to create an empirically based food web model of the Lake Superior offshore fish community. Stomachs were collected seasonally (spring, summer, and fall) from nine offshore locations in 2005, using bottom and midwater trawls.

  1. Outsourcing and Offshoring of Business Services: Challenges to Theory, Management and Geography of Innovation

    Microsoft Academic Search

    Silvia Massini; Marcela Miozzo

    2010-01-01

    Massini S. and Miozzo M. Outsourcing and offshoring of business services: challenges to theory, management and geography of innovation, Regional Studies. Drawing on an original survey, this paper discusses the trends and challenges posed by the outsourcing and offshoring of business services. It documents and analyses the increasing offshoring of business services (administrative services, call centres, information technology services, procurement,

  2. Project GOSAP (PP-USA.1): Gulf offshore satellite applications project

    NASA Technical Reports Server (NTRS)

    Biegert, E. K.; Baker, R. N.; Sailor, R. V.; Shaudt, K. E.; MacDonald, I. R.; Tapley, B.; Shum, C. K.; Amos, J.; Berry, J. L.; Hess, J.

    1996-01-01

    The Gulf offshore satellite applications project (GOSAP) was carried out in order to determine how best to use remote sensing technology to address offshore problems and operations faced by marine engineering organizations. The potentials of satellite-based offshore exploration, ocean engineering and environmental applications using combined satellite and airborne measurements are investigated. The applications include the detection of oil slicks.

  3. Offshore Wind Power: Science, engineering, and policy MAST 628-010, Fall 2008

    E-print Network

    Firestone, Jeremy

    Offshore Wind Power: Science, engineering, and policy MAST 628-010, Fall 2008 Revised 10 October, plan, regulate, and develop offshore wind resources for large-scale power production. Offshore wind and mechanical engineering aspects of wind turbines and power transmission; · Connecting wind electricity

  4. | | | | |Monday, July 16, 2012 Three Northeast Ohio offshore wind power projects

    E-print Network

    Rollins, Andrew M.

    | | | | |Monday, July 16, 2012 Home Three Northeast Ohio offshore wind power projects secure federal money By SCOTT SUTTELL 1:52 pm, September 9, 2011 Three Northeast Ohio offshore wind power." Three Northeast Ohio offshore wind power projects secure federal money... http

  5. Offshore Wind Jobs and Economic Development Impact: Four Regional Scenarios (Presentation)

    SciTech Connect

    Tegen, S.

    2014-11-01

    NREL's Jobs and Economic Development Impact (JEDI) Model for Offshore Wind, is a computer tool for studying the economic impacts of fixed-bottom offshore wind projects in the United States. This presentation provides the results of an analysis of four offshore wind development scenarios in the Southeast Atlantic, Great Lakes, Mid-Atlantic, and Gulf of Mexico regions.

  6. 75 FR 12560 - Certificate of Alternative Compliance for the Offshore Supply Vessel BUMBLE BEE

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-16

    ...Compliance for the Offshore Supply Vessel BUMBLE BEE AGENCY: Coast Guard, DHS. ACTION: Notice...issued for the offshore supply vessel BUMBLE BEE as required by 33 U.S.C. 1605(c...issued for the offshore supply vessel BUMBLE BEE, O.N. 1218416. Full compliance...

  7. 75 FR 20371 - Certificate of Alternative Compliance for the Offshore Supply Vessel LEBOUEF TIDE

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-19

    ...for the Offshore Supply Vessel LEBOUEF TIDE AGENCY: Coast Guard, DHS. ACTION: Notice...for the offshore supply vessel LEBOUEF TIDE as required by 33 U.S.C. 1605(c...for the offshore supply vessel LEBOUEF TIDE. The horizontal distance between the...

  8. Offshoring technology innovation: A case study of rare-earth technology

    Microsoft Academic Search

    Brian J. Fifarek; Francisco M. Veloso; Cliff I. Davidson

    2008-01-01

    Many US firms are improving their individual competitiveness by offshoring manufacturing operations, services and, increasingly, knowledge work. Although research to date has maintained that these practices are beneficial to the offshoring firm and national economies, by reducing costs and expanding markets, little is known about the longer term effect of offshoring on the rate of innovation of home economies. This

  9. A Matter of Coherence: The Effects of Offshoring of Intangibles on Firm Performance

    Microsoft Academic Search

    Federica Ceci; Francesca Masciarelli

    2010-01-01

    Offshoring of intangibles is a global production strategy based on the decision to externalize intangible activities to foreign countries. In the present work we test the existence of a positive relationship between offshoring intangibles and firm performance. To reap the full benefit of offshoring, firms are required to integrate and coordinate activities and knowledge; integration and coordination become difficult when

  10. St h ti d i l i fStochastic dynamic analysis of offshore wind turbines

    E-print Network

    Nørvåg, Kjetil

    1 St h ti d i l i fStochastic dynamic analysis of offshore wind turbines ­ with emphasis on fatigue analysis of offshore bottom-fixed wind turbines · Modelling and dynamic analysis of floating wind turbines ­ Stochastic dynamic analysis of offshore wind turbines; mooring system for wave energy converters · 2010 8

  11. Tectonic wedging along the rear of the offshore Taiwan accretionary prism

    E-print Network

    Chi, Wu-Cheng

    Tectonic wedging along the rear of the offshore Taiwan accretionary prism Wu-Cheng Chia,b,*, Donald the rear of the offshore Taiwan accretionary prism were studied using seismic reflection profiling and gravity modeling. Deformation between the offshore prism and forearc basin at the point of incipient

  12. History of Oceanography in the Offshore Waters of the Gulf of Maine

    E-print Network

    6 History of Oceanography in the Offshore Waters of the Gulf of Maine by John B. Colton, Jr. McKeman, Dnpcio, History of Oceanography in the Offshore Waters of the Gulf of Maine by JOHN B Acknowledgments. Literature cited ·· 111 Page 2 13 13 13 #12;History of Oceanography In the Offshore Waters

  13. 75 FR 53323 - Certificate of Alternative Compliance for the Offshore Supply Vessel LYMAN MARTIN

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-31

    ...Compliance for the Offshore Supply Vessel LYMAN MARTIN AGENCY: Coast Guard, DHS. ACTION...issued for the offshore supply vessel LYMAN MARTIN as required by 33 U.S.C. 1605(c...issued for the offshore supply vessel LYMAN MARTIN, O.N. 11227085. The horizontal...

  14. Jackup converts to construction unit for surf operations. [Offshore drilling units

    SciTech Connect

    Not Available

    1983-11-01

    Jackup drilling units which can be quickly converted to install platform jackets and lay pipe can reduce the costs of development in shallow-water surf zones. Two such units, built for Keydril of Houston, are currently working in surf zones off West Africa. Construction features are described.

  15. A high-speed study of the dynamic bullet-body interactions produced by grazing gunshots with full metal jacketed and lead projectiles.

    PubMed

    Thali, M J; Kneubuehl, B P; Zollinger, U; Dirnhofer, R

    2003-03-27

    Experimenting upon a synthetic, non-biological Skull-Brain Model, our goal was to document and study the bullet-body interaction of grazing (glancing, tangential) gunshots. Thanks to the high-speed study of the dynamic bullet-body interaction it was possible to document the glancing behavior of projectiles with a resolution of 50 million pictures per second. It was possible to demonstrate the differing deformation and fragmentation patterns between the 9mm Luger full metal jacketed projectile and the 38 Smith & Wesson (S & W) lead round nose projectile. In a true-to-life manner the morphologic fracture systems could be documented by utilization of the model in dependence of the projectile's behavior, deformation, and fragmentation. Based on these experimental studies with body models, conclusions could be drawn for surgical and reconstructive forensic questions in real cases. In summary, model substitutes offer a suitable basis for the study of the bullet-body interaction because the experiments are reproducible, totally independent of the biological variances of corpse and animal experiments, and are harmless from the ethical perspective. PMID:12711187

  16. MARINE INSTITUTE Offshore Safety and Survival Centre (OSSC)

    E-print Network

    Oyet, Alwell

    MARINE INSTITUTE Offshore Safety and Survival Centre (OSSC) Fisheries and Marine Institute Memorial[ ] No [ ] Have you ever attended Marine Institute or Memorial University of Newfoundland? Yes[ ] No[ ] Please [ ] Specialized Oil Tanker Safety [ ] WHMIS [ ] Marine Basic First Aid (MBFA) [ ] Oil & Chemical Tanker

  17. A conceptual offshore oil and gas process accident model

    Microsoft Academic Search

    M. F. Kujath; P. R. Amyotte; F. I. Khan

    2010-01-01

    The purpose of this paper is to present and discuss an accident prevention model for offshore oil and gas processing environments. The accidents that are considered in this work relate specifically to hydrocarbon release scenarios and any escalating events that follow. Using reported industry data, the elements to prevent an accident scenario are identified and placed within a conceptual model

  18. Offshore Petroleum Resource Development and Marine Mammals: A Review and

    E-print Network

    Offshore Petroleum Resource Development and Marine Mammals: A Review and Research Recommendations J with all phases of petroleum exploration and production. The physical, physiological, and behavioral ef to cause acute toxicity. However, the long- term effects of accumulation of petroleum basic data needed

  19. LATE QUATERNARY EVOLUTION OF THE NORTHEAST FAN, OFFSHORE NOVA SCOTIA

    E-print Network

    Beaumont, Christopher

    LATE QUATERNARY EVOLUTION OF THE NORTHEAST FAN, OFFSHORE NOVA SCOTIA Matthew Robichaud Submitted of Earth Sciences Dalhousie University, Halifax, Nova Scotia March 2006 #12;jt Dalhousie University Department of Earth Sciences Halifax, Nova Scotia Canada B3H 3|5 (902) 494-2358 FAX 1902) 494-f>8«9 DATE

  20. GEOPHYSICAL CORRELATION OF ONSHORE AND OFFSHORE GEOLOGY, SOUTHWESTERN NOVA SCOTIA

    E-print Network

    Beaumont, Christopher

    GEOPHYSICAL CORRELATION OF ONSHORE AND OFFSHORE GEOLOGY, SOUTHWESTERN NOVA SCOTIA by Virginia I, Honours at Dalhousie University Halifax, Nova Scotia March 2006 #12;- i - ABSTRACT The geology of southwestern Nova Scotia is characterized by plutons of varying compositions intruding a Meguma host rock

  1. Northwest Sumatra and Offshore Islands Field Survey after the December

    E-print Network

    Northwest Sumatra and Offshore Islands Field Survey after the December 2004 Indian Ocean Tsunami as much as 10 m at 1,500 m inland. Extensive tsunami deposits, primarily composed of sand and typically 5,200­1,300 km segment of inter- a United States Geological Survey Pacific Science Center, 400 Natural Bridges

  2. Offshore Hedge Funds: Survival and Performance 1989-1995

    Microsoft Academic Search

    Stephen J. Brown; William N. Goetzmann; Roger G. Ibbotson

    1997-01-01

    We examine the performance of the offshore hedge fund industry over the period 1989 through 1995 using a database that includes defunct as well as currently operating funds. The industry is characterized by high attrition rates of funds and little evidence of differential manager skill. We develop endogenous style categories for relative fund performance measures and find that repeat-winner and

  3. Anchor deployment for deep water floating offshore equipments

    Microsoft Academic Search

    O. B. Augusto; B. L. Andrade

    2003-01-01

    In this work a planning methodology for deep water anchor deployment in offshore platforms and floating production systems aiming at operational resources optimization is explored, by minimizing a multi criteria objective function. As an additional advantage provided by the proposed methodology, planning automation is achieved. Planning automation overcomes the traditional way, using a trial error basis. With it, an engineer,

  4. MELTING OF NORM - CONTAMINATED EQUIPMENT OF AN OFFSHORE OIL PLATFORM

    Microsoft Academic Search

    M. Sappok; U. Quade; T. Kluth

    About 6000 offshore plants for oil and natural gas exploration are world wide in operation. 640 are located in the North Sea and North Atlantic area, 60 of which have been shut down so far. The contamination of these installations with heavy metals e. g. mercury and NORM requires an ecologically disposal concept. The Continental Netherlands Oil Company B. V.

  5. The Use of Centrifugal Separators for Offshore Gas Production

    Microsoft Academic Search

    W. R. Lobdell; L. M. Ayers

    1974-01-01

    For offshore installations, the use of centrifugal separators results in a reduction of capital investments for production equipment, and a reduction in construction costs can be realized. Centrifugal separators are relatively small in diameter, light in weight, and yield efficient separation of gas well fluids for a wide range of flow rates. This flexibility results in the design and onshore

  6. 4. LIGHTHOUSE SITE OFFSHORE AT MOUTH OF FEDERAL CHANNEL, AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. LIGHTHOUSE SITE OFFSHORE AT MOUTH OF FEDERAL CHANNEL, AND WEST END OF NORTH TRAINING WALL, LOOKING SOUTHEAST FROM THE WATER TOWARD THE BUILDINGS OF THE FORMER ALAMEDA NAVAL AIR STATION, ALONG THE SOUTH SIDE. - Oakland Harbor Training Walls, Mouth of Federal Channel to Inner Harbor, Oakland, Alameda County, CA

  7. Higher Skills and the Knowledge Economy: The Challenge of Offshoring

    ERIC Educational Resources Information Center

    Craig, John; Gunn, Andrew

    2010-01-01

    Recent economics literature on offshoring highlights the trend towards the relocation of high-skill jobs to emerging economies. This evolution presents a challenge to the established knowledge economy discourse on which the relationship between higher education, higher skills, higher productivity and higher incomes has been based. This paper…

  8. Measurement and Reduction of Offshore Wind Turbine Construction Noise

    Microsoft Academic Search

    Karl-Heinz Elmer; Wolf-Jürgen Gerasch

    2006-01-01

    Summary Both operation and construction of offshore wind turbines induce underwater noise. While it is not yet clear if operating noise affects the behavior of marine animals, construction noise is considered crucial. Common foundation techniques require to drive steel tubes up to 30 m into the seabed. In general, hydraulic pile hammers are used for this purpose. During the erection

  9. Measurement and Reduction of Offshore Wind Turbine Construction Noise

    Microsoft Academic Search

    Externer Artikel

    Summary Both operation and construction of offshore wind turbines induce underwater noise. While it is not yet clear if operating noise affects the behavior of marine animals, construction noise is considered crucial. Common foun- dation techniques require to drive steel tubes up to 30 m into the seabed. In general, hydraulic pile hammers are used for this purpose. During the

  10. 10 Solar powerplants. gas turbines packaged for offshore gas platform

    Microsoft Academic Search

    Alberte

    1976-01-01

    Weatherby Engineering Co. neared completion recently of 8 modules mounting a total of 9 gas turbine engines, all destined for an offshore gas injection platform. The platform capacity is 80 MMcfd. The inlet pressure on the platform is 45 psig and the discharge pressure is 3,410 psig. The system constitutes a complete gas dehydration and compressor station and the modules

  11. Grid power integration technologies for offshore ocean wave energy

    Microsoft Academic Search

    Tarek Ahmed; Katsumi Nishida; Mutsuo Nakaoka

    2010-01-01

    In this paper, the advanced electric technologies for grid power integration of different offshore wave energy conversion devices are presented. The electrical connection configurations for integrating the electric power of the multi wave energy conversion devices such as the Oscillating Water Column, Pelamis, the Wave Point Absorbers and the Wave Dragon are developed by employing the most efficient low cost

  12. Finite element analysis of tensegrity structures in offshore aquaculture installations

    Microsoft Academic Search

    Østen Jensen; Anders Sunde Wroldsen; Pål Furset Lader; Arne Fredheim; Mats Heide

    2007-01-01

    Aquaculture is the fastest growing food producing sector in the world. Considerable interest exists in developing open ocean aquaculture in response to a shortage of suitable, sheltered inshore locations and possible husbandry advantages of oceanic sites such as increased water quality and oxygen supply, which improve production efficiency and the quality of fish. The extreme weather conditions experienced offshore leads

  13. A remote acoustic monitoring system for offshore aquaculture fish cage

    Microsoft Academic Search

    Xiaomei Xu; Xiaokang Zhang

    2007-01-01

    Offshore fish cage culture is being popularized in China. However, it is difficult to observe fish activity and the status of the net cage by naked eye because of the deep and turbid sea water. Aquaculture farmers, therefore, need a way to remotely observe fish activity and the status of the net cage on a regular basis without having to

  14. ENVIRONMENTAL ISSUES ASSOCIATED WITH OFFSHORE AQUACULTURE & MODELING POTENTIAL IMPACT

    Microsoft Academic Search

    Ralf Riedel; Christopher J. Bridger

    ABSTRACT Real and perceived aquaculture environmental impacts that must be considered prior to expansion to open ocean locations include: 1) benthic carbon loading, 2) water column nutrification, 3) stim- ulation of harmful algal blooms, and 4) escapement and implications to wild populations. Asim- ulation model was developed for predicting the benthic impacts from offshore cage culture. The model simulates the

  15. Situation awareness and safety in offshore drill crews

    Microsoft Academic Search

    Anne Sneddon; Kathryn Mearns; Rhona Flin

    2006-01-01

    In many industrial settings, the situation awareness (SA) of workers needs to be maintained at a high level to ensure the safety of their operation. This is particularly relevant to offshore oil-drilling and gas-drilling crews, given the interactive and hazardous nature of their work. This paper presents a review of SA in drilling incidents and results from interviews with oil

  16. Prediction of Weather Operating Windows for Offshore Drilling Vessels

    Microsoft Academic Search

    J. G. Hayes; M. S. Hirt; D. G. McGillivray; Bill Nicholls; Robert Waymouth; Boris Weisman

    1983-01-01

    A management 'tool' for predicting Weather Operating Windows for offshore drilling operations has been developed and tested for the dynamic positioning drillship PETREL. It is shown that two measures are required in making such an assessment: the persistence of vessel heave response as it affects drilling operations and the probable downtimes with respect to each drilling operation throughout the year

  17. Method and system for escaping from an offshore drilling platform

    Microsoft Academic Search

    R. A. Flautt; C. M. Leavitt; R. H. Reynoir

    1981-01-01

    Improvements in a system for escaping from an offshore drilling or production platform in an emergency situation which includes a stable floating structure forming a safe haven anchored near but at a safe distance from the platform, an aerial cableway extending between the platform and the haven, and a personnel carrier movable along the cableway. The principal improvement is that

  18. Safety of dynamic positioning operations on mobile offshore drilling units

    Microsoft Academic Search

    Haibo Chen; Torgeir Moan; Harry Verhoeven

    2008-01-01

    Dynamic positioning of mobile offshore drilling units for drilling operation (termed as DP drilling operation) is analyzed in this paper. A safety modeling approach based on the barrier concept is developed. Safety of DP drilling operation is modeled in terms of three main barrier functions, i.e. barrier functions to prevent loss of position, to arrest vessel movement and to prevent

  19. Operators, service companies improve horizontal drilling accuracy offshore

    SciTech Connect

    Lyle, D.

    1996-04-01

    Continuing efforts to get more and better measurement and logging equipment closer to the bit improve accuracy in offshore drilling. Using current technology, both in measurement while drilling and logging while drilling, a target can consistently be hit within five vertical feet.

  20. 76 FR 62817 - National Offshore Safety Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ...related to safety of operations and other matters affecting the oil and gas offshore industry. The meeting will be open to the...The meeting will be held at Hilton Houston NASA Clear Lake, Discovery Ballroom, 3000 NASA Road One, Houston, Texas,...