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1

Activity-Based Costing Menu Engineering  

Microsoft Academic Search

Traditional cost accounting systems have been replaced in recent years in the manufacturing sector by Activity-Based Costing (ABC) systems. This study tests and demonstrates whether the incorporation of ABC data into traditional menu engineering methods provides food service managers with an improved tool for cost and profitability analysis. The study uses ABC data collected from a restaurant in a western

Carola Raab; Jean Hertzman; Karl Mayer; Donald Bell

2007-01-01

2

ACTIVITY BASED COSTING AND ITS APPLICATION TO LEAN CONSTRUCTION  

Microsoft Academic Search

Activity-Based Costing (ABC) has been popular since the 1980s because it prevents cost distortions and provides a process view which traditional cost accounting cannot provide. Activity-Based Costing is based on a \\

Yong-Woo Kim; Glenn Ballard

2001-01-01

3

Activity-based costing and distribution logistics management  

Microsoft Academic Search

Most of the research papers and articles dealing with activity-based costing (ABC) have their focus on manufacturing operations, although the ABC approach can be applicable across the spectrum of company functions. This paper discusses activity-based costing in context with distribution logistics management. The procedure of calculating activity-based costs of a distribution warehouse in a case-company is presented in detail.

Timo Pirttilä; Petri Hautaniemi

1995-01-01

4

A New Activity-Based Financial Cost Management Method  

NASA Astrophysics Data System (ADS)

The standard activity-based financial cost management model is a new model of financial cost management, which is on the basis of the standard cost system and the activity-based cost and integrates the advantages of the two. It is a new model of financial cost management with more accurate and more adequate cost information by taking the R&D expenses as the accounting starting point and after-sale service expenses as the terminal point and covering the whole producing and operating process and the whole activities chain and value chain aiming at serving the internal management and decision.

Qingge, Zhang

5

Design of Activity-based Costing Model Based on the Reciprocal Cost Sharing  

Microsoft Academic Search

One of the difficulties of activity-based costing is the support departments (faces products\\/service indirectly) reciprocal cost sharing, and it is crucial to calculate product\\/service cost. Based on the reciprocal cost sharing of support departments, the thesis established the activity-based costing model. The model is defined as total activity-based costing model in the paper. The accuracy of product cost is improved

Suli Hao; Rijia Ding

2008-01-01

6

Reserve Personnel, Navy Manyear Rate Activity-Based Costing Model.  

National Technical Information Service (NTIS)

This thesis presents an activity-based costing model for the Reserve Personnel, Navy (RPN) Budgeting Office. The purpose of the model is to arrive at a more refined cost estimate to charge resource sponsors for fixed and discretionary support costs for re...

R. G. Marin

1995-01-01

7

ESTIMATING COSTS OF OPERATIONS AND MAINTENANCE OF OFFSHORE WIND FARMS  

Microsoft Academic Search

Summary The contribution of the Operation and Maintenance (O&M) costs of offshore wind farms to the cost of electricity generation is relatively large. The O&M effort in the wind farm is therefore one of the issues to optimise. ECN de- velops the 'Operations and Maintenance Cost Estimator'. This tool can assist owners and operators of offshore wind farms to better

P. J. Eecen; H. Braam; L. W. M. M. Rademakers; T. S. Obdam

2007-01-01

8

Activity-based costing: a model for implementing change  

Microsoft Academic Search

This paper presents a framework suggested by Kurt Lewin (1951) for analyzing the change process in activity-based costing (ABC) context. Specifically, the factors for change and the resistance to change at individual and organizational levels are discussed. The paper also suggests ways to overcome the resistance to change, and a model for implementing ABC based on the action research model.

Vidya N. Awasthi

1994-01-01

9

ESTIMATING COSTS OF OPERATION & MAINTENANCE FOR OFFSHORE WIND FARMS  

Microsoft Academic Search

Summary The operation and maintenance (O&M) costs of offshore wind farms contribute significantly to the energy generation costs. Reliable estimates of these costs are required during planning and operation of the wind farm at several stages. Such estimates however have a large spread and are uncertain. ECN is developing the O&M Cost Estimator (OMCE) with which owners and operators of

Tom Obdam; Luc Rademakers; Henk Braam; Peter Eecen

2008-01-01

10

Activity-Based Costing in the After Press Services Industry  

NASA Astrophysics Data System (ADS)

This research was conducted to apply activity-based costing (ABC) in an after press service company in Chiang Mai province, Thailand. The company produces all of its products by one-stop service (such as coating, stitching, binding, die cutting, and gluing). All products are made to order, and have different sizes and patterns. A strategy of low price is used to compete in the marketplace. After cost analysis, the study found that the company has high overhead (36.5% of total cost). The company's problem is its use of traditional cost accounting, which has low accuracy in assigning overhead costs. If management uses this information when pricing customer orders, losses may occur because real production costs may be higher than the selling price. Therefore, the application of ABC in cost analysis can help executives receive accurate cost information; establish a sound pricing strategy; and improve the manufacturing process by determining work activities which have excessively high production costs. According to this research, 6 out of 56 items had a production cost higher than the selling price, leading to losses of 123,923 baht per year. Methods used to solve this problem were: reducing production costs; establishing suitable prices; and creating a sales promotion with lower prices for customers whose orders include processes involving unused capacity. These actions will increase overall sales of the company, and allow more efficient use of its machinery.

Shevasuthisilp, Suntichai; Punsathitwong, Kosum

2009-10-01

11

Integrating activity-based costing, target costing, and value engineering for supply chain improvement  

Microsoft Academic Search

This article reviews the use of activity-based costing, target costing, and value engineering in supply chain management and proposes a managerial framework for integrating their use so as to achieve superior improvement in supply chain performance.

Wilbur I. Smith; Gabrielle Lewis; Tremika Churchwell; Colin Benjamin

2002-01-01

12

Sensitivity Analysis of Offshore Wind Cost of Energy (Poster)  

SciTech Connect

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.

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

2012-10-01

13

OFFSHORING OF APPLICATION SERVICES IN THE BANKING INDUSTRY - A TRANSACTION COST ANALYSIS  

Microsoft Academic Search

Gaining economic benefits from substantially lower labor costs has been reported as a major reason for information systems (IS) offshoring. However, many offshoring projects have failed to achieve expected cost savings, indicating that labor cost savings are offset by additional costs that arise in offshoring projects in certain situations. While previous research on IS offshoring has mostly focused on management

Jens Dibbern; Jessica K. Winkler

14

Cut drydocking costs for offshore rigs  

SciTech Connect

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.

Albaugh, E.K.

1985-07-01

15

Quality, Cost and Delivery performance indicators and Activity-Based Costing  

Microsoft Academic Search

This paper addresses an important issue the nature of and evidence for success in the transfer costing of internal or shared services and products within a company. The case of Activity-Based Costing (ABC) is used to explore how the proponents have developed a framework linking Quality, Cost and Delivery (QCD) components of products and services. The QCD performance indicators, which

Romeo G. Manalo; Marivic V. Manalo

2010-01-01

16

Activity-based costing application in indirect material cost control-photo-resist  

Microsoft Academic Search

To improve competitiveness continuously, not only fix assets should be fully utilized but variable expense should be well controlled also. If we need to setup a reasonable review mechanism and minimize cost loss of indirect material excess usage or inventory shortage, which is caused by unaccomplished usage target. Activity-based costing method (ABC) is a kind of methodology to calculate more

Yi-Chun Tsai; Jung-Sheng Jao

2002-01-01

17

Offshore maintenance reduces cost and downtime  

SciTech Connect

Maintenance is the single activity offshore that can have the most impact on productivity, safety, and downtime. Unfortunately, unless it is well organized, maintenance may be carried out according to unchanging and often unnecessary routines. Overly rigid maintenance procedures, that are viewed by crews as ''makework'' assignments, are not conducive to quality or to failure-proof operation of key rig systems. An alternate system of maintenance, which Keydril has adopted on all its rigs, is designed to circumvent the problems of crew attitude and at the same time provide an effective preventive program that simply and efficiently manages all of the rig's operational requirements. The program consists of detailed maintenance and test procedures which are based on frequency analyses of the operating profiles of each piece of machinery. Keydril calls the program an Engineered Approach to Maintenance. The heart of the engineered approach system is a color-coded visual display of maintenance requirement cards (T-cards). These cards assign and describe specific tasks according to an analysis of the operating history of the unit itself and analyses of similar equipment on other company rigs. The second part of the engineered system is the use of high-technology testing methods that can remotely analyze various operating parameters and give early warning of equipment wear prior to failure. The equipment on board Keydril's rigs must be used, and rig personnel have to know that it will always work at satisfactory performance levels. The engineered approach to maintenance provides that assurance.

Danahy, J.W.

1983-08-01

18

Activity-based Costing: A Case Study of Manufacturing Motorcycle Front and Sprockets  

Microsoft Academic Search

The purpose of this study was to determine the product costs of both motorcycle front and rear sprocket by using activity based costing (ABC), which has the ability to raise strategic management and reduce cost distortion. The comparison between ABC and traditional unit based costing (UBC) had been done and reported. The results obtained from this work indicated that costs

Munutchanok Jongprasithpron; Somkiat Jongprasithpron; Nantakrit Yodpijit

2006-01-01

19

Advanced decision support tool by integrating activity-based costing and management to system dynamics  

Microsoft Academic Search

In today's global and competitive business environment cost control and cost management have become a decisive variable in the firm's financial success. This requires reliable tools and techniques to estimate business expenses and enhance the understanding about business operation costs. The ultimate reason for firms to adopt activity-based costing and management (ABC\\/M) is to manage and control its costs, to

Amir H. Khataie; Akif A. Bulgak; Juan J. Segovia

2010-01-01

20

Repairing an offshore jacket structure proves cost effective  

SciTech Connect

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.

Still, J.R.; Blackwood, V.

2000-05-01

21

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

SciTech Connect

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.

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

2012-09-01

22

The application of activity-based costing to a support kitchen in a Las Vegas casino  

Microsoft Academic Search

Purpose – The paper aims to examine the activity-based costing (ABC) method as a feasible and appropriate tool for the casino and hotel industry to apply to support kitchens in order to eliminate the monthly allocation of overhead based on variable costs. Design\\/methodology\\/approach – Data were collected at a support kitchen in a Las Vegas casino. These data were analyzed

Paige Vaughn; Carola Raab; Kathleen B. Nelson

2010-01-01

23

Towards the use of ontologies for activity-based costing in healthcare organizations.  

PubMed

Activity-based costing is a methodology which provides a basis for healthcare cost optimization. A robust formal representation of such activities is needed in order to be able to draw inferences as to the costs involved in a reliable manner. An introduction to the basic ontological distinctions involved in such a representation and to the complications one faces in carrying out the task is presented in this paper. PMID:17108573

Kumar, Anand

2006-01-01

24

Product Costing: A Comparison of Conventional and Activity-based Costing Methods  

Microsoft Academic Search

Product costs are calculated by many different departments in a company: cost engineering, industrial engineering, design, manufacturing, etc. The aims of these groups, the methods used by them and the uses to which their results are put are different. Cost engineering provides cost estimates based on finished designs. Industrial\\/manufacturing engineering groups calculate costs with a high emphasis on processing costs.

M. S. HUNDAL

1997-01-01

25

The Integrated Activity-Based Costing and Economic Value Added System as a Strategic Management Tool: A Field Study  

Microsoft Academic Search

This paper describes a field study which examines the implementation of an integrated Activity- Based Costing and Economic Value Added System in two small manufacturing firms. The results of this study suggest that this integrated approach outperforms both traditional cost accounting and standard Activity-Based Costing methods. Furthermore, the findings from two small companies show that the reliability of cost information

Narcyz Roztocki

2000-01-01

26

Installation, Operation, and Maintenance Strategies to Reduce the Cost of Offshore Wind Energy.  

National Technical Information Service (NTIS)

This report is intended to provide offshore wind industry stakeholders a basis for evaluating potential cost saving installation, operation, and maintenance (IO&M) strategies and technologies. The work was completed by the National Renewable Energy Labora...

B. Maples G. Saur M. Hand R. van de Pietermen T. Obdam

2013-01-01

27

Activity-based costing methodology for third-party logistics companies  

Microsoft Academic Search

This paper will analyze the main costs that third-party logistics companies are facing and develops an activity-based costing methodology useful for this kind of company. It will examine the most important activities carried out by third-party distributors in both warehousing and transporting activities. However, the focus is mainly on the activity of distributing the product to the final receiver when

Carles Gríful-Miquela

2001-01-01

28

Activity-Based Cost Analysis of Recruit Training Operations at Marine Corps Recruit Depot, San Diego, California.  

National Technical Information Service (NTIS)

Activity-based costing has been embraced as the methodology which will be used to structure and organize cost management information for the Marine Corps. This methodology is applied to operations at the Marine Corps Recruit Depot, San Diego, California. ...

J. J. Hansbrough

2000-01-01

29

Natioinal Shipbuilding Research Program. Shipyard Cost Model Using Activity-Based Costing Methods.  

National Technical Information Service (NTIS)

This document was originally intended to be a pilot study of the hidden costs facing U.S. shipyards in the process of 'economically converting' from almost entirely military ship construction to designing and building commercial ships for the internationa...

1996-01-01

30

Determination of chest x-ray cost using activity based costing approach at Penang General Hospital, Malaysia  

PubMed Central

Background Activity based costing (ABC) is an approach to get insight of true costs and to solve accounting problems. It provides more accurate information on product cost than conventional accounting system. The purpose of this study was to identify detailed resource consumption for chest x-ray procedure. Methods Human resource cost was calculated by multiplying the mean time spent by employees doing specific activity to their per-minute salaries. The costs of consumables and clinical equipments were obtained from the procurement section of the Radiology Department. The cost of the building was calculated by multiplying the area of space used by the chest X-ray facility with the unit cost of public building department. Moreover, straight-line deprecation with a discount rate of 3% was assumed for calculation of equivalent annual costs for building and machines. Cost of electricity was calculated by multiplying number of kilo watts used by electrical appliance in the year 2010 with electricity tariff for Malaysian commercial consumers (MYR 0.31 per kWh). Results Five activities were identified which were required to develop one chest X-ray film. Human resource, capital, consumable and electricity cost was MYR 1.48, MYR 1.98, MYR 2.15 and MYR 0.04, respectively. Total cost of single chest X-ray was MYR 5.65 (USD 1.75). Conclusion By applying ABC approach, we can have more detailed and precise estimate of cost for specific activity or service. Choice of repeating a chest X-ray can be based on our findings, when cost is a limiting factor.

Atif, Muhammad; Sulaiman, Syed Azhar Syed; Shafie, Asrul Akmal; Saleem, Fahad; Ahmad, Nafees

2012-01-01

31

Instructional Case—Activity-based Costing Incorporating both Activity and Product Costing  

Microsoft Academic Search

In recent years, accounting educators have responded to pressure from various stakeholders to improve the skills of accounting graduates. The skills demanded by these constituencies are consistent and include analytical thinking, problem-solving, and communication skills. The purpose of this paper is to describe our approach to addressing these issues in our undergraduate cost\\/managerial accounting classes by supplementing textbooks with an

J. Gregory Bushong; John C. Talbott; David W. Cornell

2008-01-01

32

Methodology of life cycle cost with risk expenditure for offshore process at conceptual design stage  

Microsoft Academic Search

This study proposed a new LCC (life cycle cost) methodology with the risk expenditure taken into account for comparative evaluation of offshore process options at their conceptual design stage. The risk expenditure consisted of the failure risk expenditure and the accident risk expenditure. The former accounted for the production loss and the maintenance expense due to equipment failures while the

Kiil Nam; Daejun Chang; Kwangpil Chang; Taejin Rhee; In-Beum Lee

2011-01-01

33

Question of offshore oil  

Microsoft Academic Search

The following four papers were presented: the value of offshore oil; the environmental impact of offshore drilling; social benefit\\/cost analysis of offshore drilling; and the appropriate pace of offshore drilling. Commentary and response followed each presentation. (LK)

1976-01-01

34

Changing vessel routes could significantly reduce the cost of future offshore wind projects.  

PubMed

With the recent emphasis on offshore wind energy Coastal and Marine Spatial Planning (CMSP) has become one of the main frameworks used to plan and manage the increasingly complex web of ocean and coastal uses. As wind development becomes more prevalent, existing users of the ocean space, such as commercial shippers, will be compelled to share their historically open-access waters with these projects. Here, we demonstrate the utility of using cost-effectiveness analysis (CEA) to support siting decisions within a CMSP framework. In this study, we assume that large-scale offshore wind development will take place in the US Mid-Atlantic within the next decades. We then evaluate whether building projects nearshore or far from shore would be more cost-effective. Building projects nearshore is assumed to require rerouting of the commercial vessel traffic traveling between the US Mid-Atlantic ports by an average of 18.5 km per trip. We focus on less than 1500 transits by large deep-draft vessels. We estimate that over 29 years of the study, commercial shippers would incur an additional $0.2 billion (in 2012$) in direct and indirect costs. Building wind projects closer to shore where vessels used to transit would generate approximately $13.4 billion (in 2012$) in savings. Considering the large cost savings, modifying areas where vessels transit needs to be included in the portfolio of policies used to support the growth of the offshore wind industry in the US. PMID:24794388

Samoteskul, Kateryna; Firestone, Jeremy; Corbett, James; Callahan, John

2014-08-01

35

TOOLS FOR ESTIMATING OPERATION AND MAINTENANCE COSTS OF OFFSHORE WIND FARMS: State of the Art  

Microsoft Academic Search

Summary In 2000, ECN has defined a long term R&D program with the ultimate aim to lower the O&M (Operation and Maintenance) costs of offshore wind farms. Part of this R&D program focuses on the development of models to quantify and optimise the O&M aspects in the planning phase of wind farms. This has resulted in a software tool with

L. W. M. M. Rademakers; H. Braam; T. S. Obdam; N. Kruse

36

Critical analysis of the Hanford spent nuclear fuel project activity based cost estimate  

SciTech Connect

In 1997, the SNFP developed a baseline change request (BCR) and submitted it to DOE-RL for approval. The schedule was formally evaluated to have a 19% probability of success [Williams, 1998]. In December 1997, DOE-RL Manager John Wagoner approved the BCR contingent upon a subsequent independent review of the new baseline. The SNFP took several actions during the first quarter of 1998 to prepare for the independent review. The project developed the Estimating Requirements and Implementation Guide [DESH, 1998] and trained cost account managers (CAMS) and other personnel involved in the estimating process in activity-based cost (ABC) estimating techniques. The SNFP then applied ABC estimating techniques to develop the basis for the December Baseline (DB) and documented that basis in Basis of Estimate (BOE) books. These BOEs were provided to DOE in April 1998. DOE commissioned Professional Analysis, Inc. (PAI) to perform a critical analysis (CA) of the DB. PAI`s review formally began on April 13. PAI performed the CA, provided three sets of findings to the SNFP contractor, and initiated reconciliation meetings. During the course of PAI`s review, DOE directed the SNFP to develop a new baseline with a higher probability of success. The contractor transmitted the new baseline, which is referred to as the High Probability Baseline (HPB), to DOE on April 15, 1998 [Williams, 1998]. The HPB was estimated to approach a 90% confidence level on the start of fuel movement [Williams, 1998]. This high probability resulted in an increased cost and a schedule extension. To implement the new baseline, the contractor initiated 26 BCRs with supporting BOES. PAI`s scope was revised on April 28 to add reviewing the HPB and the associated BCRs and BOES.

Warren, R.N.

1998-09-29

37

Offshore industry  

SciTech Connect

Worldwide offshore mobile drilling rig activity is described with details on rig orders, construction, installation and costs, and on supply and auxiliary vessels used with offshore rigs. Tabulated data are presented on the number of offshore rigs working at sites in both the eastern and western hemispheres. In 1980 the total number of drilling units increased to 306 from 70 in 1979. (LCL)

Heil, G.

1981-04-01

38

The Effects of the Use of Activity-Based Costing Software in the Learning Process: An Empirical Analysis  

Microsoft Academic Search

This study investigates the influence of the use of accounting software in teaching activity-based costing (ABC) on the learning process. It draws upon the Theory of Planned Behaviour and uses the end-user computer satisfaction (EUCS) framework to examine students' satisfaction with the ABC software. The study examines students' satisfaction with the software and the mediating role it plays between assignment

Andrea Tan; Aldónio Ferreira

2012-01-01

39

The Effects of the Use of Activity-Based Costing Software in the Learning Process: An Empirical Analysis  

Microsoft Academic Search

This study investigates the influence of the use of accounting software in teaching activity-based costing (ABC) on the learning process. It draws upon the Theory of Planned Behaviour and uses the end-user computer satisfaction (EUCS) framework to examine students' satisfaction with the ABC software. The study examines students' satisfaction with the software and the mediating role it plays between assignment

Andrea Tan; Aldónio Ferreira

2011-01-01

40

Status of costing hospital nursing work within Australian casemix activity-based funding policy.  

PubMed

Australia has a long history of patient level costing initiated when casemix funding was implemented in several states in the early 1990s. Australia includes, to some extent, hospital payment based on nursing intensity adopted within casemix funding policy and the Diagnostic Related Group system. Costing of hospital nursing services in Australia has not changed significantly in the last few decades despite widespread introduction of casemix funding policy at the state level. Recent Commonwealth of Australia National Health Reform presents change to the management of the delivery of health care including health-care costing. There is agreement for all Australian jurisdictions to progress to casemix-based activity funding. Within this context, nurse costing infrastructure presents contemporary issues and challenges. An assessment is made of the progress of costing nursing services within casemix funding models in Australian hospitals. Valid and reliable Australian-refined nursing service weights might overcome present cost deficiencies and limitations. PMID:22257324

Heslop, Liza

2012-02-01

41

Review of the cost-effectiveness of EPA's offshore oil and gas effluent guidelines  

SciTech Connect

The United States Environmental Protection Agency (EPA) published proposed Effluent Limitation Guidelines and New Source Performance Standards for the Offshore Subcategory of the Oil and Gas Extraction Point Source Category on March 13, 1991 (56 FR 10664). These guidelines include limitations for Best Practicable Technology (BPT), Best Conventional Technology (BPT), Best Available Technology (BAT), and New Source Performance Standards (NSPS) for produced water, drilling fluids, drill cuttings, well treatment fluids, deck drainage, produced sand, and sanitary and domestic waste. As a support document to these regulations, EPA published a Cost-Effectiveness (CE) Analysis (EPA, 1991). This report calculated the CE of several different BAT and NSPS treatment options for produced water and drilling fluids and drill cuttings. Separate calculations were made for restricted versus unrestricted drilling rights and for three different oil costs per barrel. Each treatment option has a different cost and will result in removal of different levels of pollutants. The report calculates the annualized cost for each option and the pound equivalents (PE) removed and expresses the CE as $/PE. While not officially required for decision-making, as long as the CE falls within some reasonable range, the selected treatment option is considered acceptable. This paper examines the premises and assumptions used in the CE analysis and recalculates the CE statistic using alternate assumptions.

Veil, J.A.

1991-01-01

42

Review of the cost-effectiveness of EPA`s offshore oil and gas effluent guidelines  

SciTech Connect

The United States Environmental Protection Agency (EPA) published proposed Effluent Limitation Guidelines and New Source Performance Standards for the Offshore Subcategory of the Oil and Gas Extraction Point Source Category on March 13, 1991 (56 FR 10664). These guidelines include limitations for Best Practicable Technology (BPT), Best Conventional Technology (BPT), Best Available Technology (BAT), and New Source Performance Standards (NSPS) for produced water, drilling fluids, drill cuttings, well treatment fluids, deck drainage, produced sand, and sanitary and domestic waste. As a support document to these regulations, EPA published a Cost-Effectiveness (CE) Analysis (EPA, 1991). This report calculated the CE of several different BAT and NSPS treatment options for produced water and drilling fluids and drill cuttings. Separate calculations were made for restricted versus unrestricted drilling rights and for three different oil costs per barrel. Each treatment option has a different cost and will result in removal of different levels of pollutants. The report calculates the annualized cost for each option and the pound equivalents (PE) removed and expresses the CE as $/PE. While not officially required for decision-making, as long as the CE falls within some reasonable range, the selected treatment option is considered acceptable. This paper examines the premises and assumptions used in the CE analysis and recalculates the CE statistic using alternate assumptions.

Veil, J.A.

1991-12-31

43

Cost and Potential of Offshore Wind Energy on the Dutch Part of the North Sea.  

National Technical Information Service (NTIS)

With the growing attention for offshore wind energy seen today there is a need for a sophisticated, quantitative investigation of the opportunities for offshore wind energy. The Energy Research Center of the Netherlands (ECN) has therefore developed a com...

H. J. T. Kooijman M. de Noord C. Volkers L. A. H. Machielse P. J. Eecen J. T. G. Pierik S. A. Herman F. Hagg

2001-01-01

44

Development of Activity-based Cost Functions for Cellulase, Invertase, and Other Enzymes  

NASA Astrophysics Data System (ADS)

As enzyme chemistry plays an increasingly important role in the chemical industry, cost analysis of these enzymes becomes a necessity. In this paper, we examine the aspects that affect the cost of enzymes based upon enzyme activity. The basis for this study stems from a previously developed objective function that quantifies the tradeoffs in enzyme purification via the foam fractionation process (Cherry et al., Braz J Chem Eng 17:233-238, 2000). A generalized cost function is developed from our results that could be used to aid in both industrial and lab scale chemical processing. The generalized cost function shows several nonobvious results that could lead to significant savings. Additionally, the parameters involved in the operation and scaling up of enzyme processing could be optimized to minimize costs. We show that there are typically three regimes in the enzyme cost analysis function: the low activity prelinear region, the moderate activity linear region, and high activity power-law region. The overall form of the cost analysis function appears to robustly fit the power law form.

Stowers, Chris C.; Ferguson, Elizabeth M.; Tanner, Robert D.

45

Activity-based costing of security services for a Department of Energy nuclear site.  

National Technical Information Service (NTIS)

Department of Energy (DOE) nuclear facilities are being encouraged to reduce costs but the accounting data typically in use by the financial organizations at these laboratories cannot easily be used to determine which security activities offer the best re...

D. F. Togo M. Snell C. Potter

1997-01-01

46

Acute energy cost of multi-modal activity-based therapy in persons with spinal cord injury  

PubMed Central

Objective To examine acute energy costs of multi-modal activity-based therapy (ABT) in men and women with spinal cord injury (SCI). Study design Descriptive case series. Setting An outpatient center in California. Participants Seven men and women (age = 28.3 ± 11.6 years; duration of injury = 4.3 ± 2.5 years) with injury levels ranging from C5 to T8. Intervention Activity-based therapy. Outcome measures Oxygen uptake (VO2), energy expenditure (kcal/minute), SCI Metabolic Equivalent of Task (MET) (1 MET = 2.7 ml/kg/minute). Results Oxygen uptake (VO2) during ABT ranged from 5.10 to 8.62 ml/kg/minute, with VO2 consistently higher during modalities involving load bearing versus non-load bearing (P = 0.08). SCI MET values ranged from 1.89 to 3.24 and were significantly higher in subjects with mid-thoracic injury versus low-cervical injury (P = 0.01). Conclusion Data reveal that multi-modal ABT increases VO2 in persons with SCI, but energy expenditure is relatively low. Strategies must be identified to optimize energy expenditure in the SCI to reduce health risks. Modalities involving load bearing seem to be superior to non-load-bearing activities. VO2 was greater in response to load-bearing modalities than non-load-bearing modalities. It remains to be determined whether chronic ABT enhances cardiovascular fitness and reduces disease risks in this population.

Harness, Eric Turner; Astorino, Todd A.

2011-01-01

47

Regulatory Effects and Strategic Global Staffing Profiles: Beyond Cost Concerns in Evaluating Offshore Location Attractiveness  

Microsoft Academic Search

The practice of offshoring—staffing all or part of a business outside the home country—has proliferated to such an extent\\u000a that the question for most multinational corporations (MNCs) is where, not if, some or all of its labor forces should be located\\u000a beyond geopolitical borders. It remains an open question, however, where and under what conditions the hoped-for advantages\\u000a of offshore

Stan Malos

2010-01-01

48

Review of the cost-effectiveness of EPA`s offshore oil and gas effluent guidelines  

Microsoft Academic Search

The United States Environmental Protection Agency (EPA) published proposed Effluent Limitation Guidelines and New Source Performance Standards for the Offshore Subcategory of the Oil and Gas Extraction Point Source Category on March 13, 1991 (56 FR 10664). These guidelines include limitations for Best Practicable Technology (BPT), Best Conventional Technology (BPT), Best Available Technology (BAT), and New Source Performance Standards (NSPS)

Veil

1991-01-01

49

Review of the cost-effectiveness of EPA's offshore oil and gas effluent guidelines  

Microsoft Academic Search

The United States Environmental Protection Agency (EPA) published proposed Effluent Limitation Guidelines and New Source Performance Standards for the Offshore Subcategory of the Oil and Gas Extraction Point Source Category on March 13, 1991 (56 FR 10664). These guidelines include limitations for Best Practicable Technology (BPT), Best Conventional Technology (BPT), Best Available Technology (BAT), and New Source Performance Standards (NSPS)

Veil

1991-01-01

50

Projective ordination by SIMCA: A dynamic strategy for cost-efficient environmental monitoring around offshore installations  

Microsoft Academic Search

A method for environmental monitoring using benthic species profiles as input is developed in this work. The method, referred to as projective ordination, utilises local principal component modelling (SIMCA) to obtain a cross-validated model which spans the natural variation in a region around offshore oil-producing installations. The borderline between regions with disturbed and non-disturbed species communities is subsequently decided from

Bernard G. J. Massart; Olav M. Kvalheim; Fred Olav Libnau; Karl I. Ugland; Kjell Tjessem; Karl Bryne

1996-01-01

51

Water treatment technology costs associated with offshore oil and gas production.  

National Technical Information Service (NTIS)

The Environmental Protection Agency (EPA) is collecting cost data related to its proposed waste water cleanliness regulations. The Energy Information Administration's (EIA) Dallas Field Office (DFO) agreed to help gather the data. The proposed EPA regulat...

1992-01-01

52

Cost effective fully fed wind turbine HTS generator: An alternative to existing generators in offshore wind farms  

Microsoft Academic Search

The Wind Industry has been focusing more on offshore wind farms for the last 10 years. Since from the commercialization, the wind industry has been changing towards market trends and become market driven too. Current research is focusing on, how to reduce the downtime due to the system components like gearbox and environment conditions like harsh weather and inaccessibility factor.

S Umashankar; D P Kothari; D Vijayakumar; M Vasudevan; Bhanuprasad Chillapalli

2011-01-01

53

Advanced transmission solutions for offshore wind farms  

Microsoft Academic Search

Future offshore wind farms will have large power ratings and will be situated much further offshore than current projects. The associated costs for grid connection will be high. This paper explores alternative methods of grid connection. By creating synergies with other applications for offshore power transmission, the total costs will be lower. Such synergies include the bundling of multiple wind

W. L. Kling; R. L. Hendriks; J. H. den Boon

2008-01-01

54

Offshore Wind Energy Systems  

ERIC Educational Resources Information Center

Explores the possibility of installing offshore windmills to provide electricity and to save fuel for the United Kingdom. Favors their deployment in clusters to facilitate supervision and minimize cost. Discusses the power output and the cost involved and urges their quick development. (GA)

Musgrove, P.

1978-01-01

55

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.

56

Offshore rectenna feasbility  

NASA Technical Reports Server (NTRS)

A preliminary study of the feasibility and cost of an offshore rectenna to serve the upper metropolitan east coast was performed. A candidate site at which to build a 5 GW rectenna was selected on the basis of proximity to load centers, avoidance of shipping lanes, sea floor terrain, and relocated conditions. Several types of support structures were selected for study based initially on the reference system rectenna concept of a wire mesh ground screen and dipoles each with its own rectifier and filter circuits. Possible secondary uses of an offshore rectenna were examined and are evaluated.

Freeman, J. W.; Hervey, D.; Glaser, P.

1980-01-01

57

Getting offshoring right.  

PubMed

The prospect of offshoring and outsourcing business processes has captured the imagination of CEOs everywhere. In the past five years, a rising number of companies in North America and Europe have experimented with this strategy, hoping to reduce costs and gain strategic advantage. But many businesses have had mixed results. According to several studies, half the organizations that have shifted processes offshore have failed to generate the expected financial benefits. What's more, many of them have faced employee resistance and consumer dissatisfaction. Clearly, companies have to rethink how they formulate their offshoring strategies. A three-part methodology can help. First, companies need to prioritize their processes, ranking each based on two criteria: the value it creates for customers and the degree to which the company can capture some of that value. Companies will want to keep their core (highest-priority) processes in-house and consider outsourcing their commodity (low-priority) processes; critical (moderate-priority) processes are up for debate and must be considered carefully. Second, businesses should analyze all the risks that accompany offshoring and look systematically at their critical and commodity processes in terms of operational risk (the risk that processes won't operate smoothly after being offshored) and structural risk (the risk that relationships with service providers may not work as expected). Finally, companies should determine possible locations for their offshore efforts, as well as the organizational forms--such as captive centers and joint ventures--that those efforts might take. They can do so by examining each process's operational and structural risks side by side. This article outlines the tools that will help companies choose the right processes to offshore. It also describes a new organizational structure called the extended organization, in which companies specify the quality of services they want and work alongside providers to get that quality. PMID:16334588

Aron, Ravi; Singh, Jitendra V

2005-12-01

58

Towers for Offshore Wind Turbines  

NASA Astrophysics Data System (ADS)

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.

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

2010-06-01

59

Offshore abandonment heats up  

SciTech Connect

This paper reviews the new concerns regarding the decommissioning of offshore oil platforms which are rapidly coming of age. It reviews the history of past removal operations and the public outcry which is now causing a reevaluation of this abandonment policy. It reviews the number of platforms which are rapidly approaching maturity on a global basis. It then goes on to costs involved in such removal operations. Finally, it reviews the new platform designs which should allow a much more cost effective decommissioning process for these future rigs.

NONE

1995-08-01

60

Seabed instability simplified model and application in offshore wind turbine  

Microsoft Academic Search

The offshore wind power is increasingly developed, it is essential to study the design technology of the offshore wind turbine foundation, which is crucial to reduce the construction cost of the offshore wind farm. In the design of marine pile foundations, the evaluation of wave-induced seabed stability is quite significant. Based on the mechanical properties of seabed, this article firstly

Zhang Yong-li; Li Jie

2009-01-01

61

Review of offshore wind turbine failures and fault prognostic methods  

Microsoft Academic Search

Wind electricity is a highly promoted energy source all around the world. The number of offshore wind farms, increases gradually because of the high capability of power generation. However, the cost of manufacturing, logistics, installation, grid control and maintenance of offshore wind turbine is high. According to the Condition Monitoring of Offshore Wind Turbine (CONMOW) report of Energy Research Centre

Bill Chun Piu Lau; Eden Wai Man Ma; Michael Pecht

2012-01-01

62

Offshore Wind Farm Layout Optimization (OWFLO) Project: Preliminary Results  

Microsoft Academic Search

Optimizing the layout of an offshore wind farm presents a significant engineering challenge. Most of the optimization literature to date has focused on land-based wind farms, rather than on offshore farms. Typically, energy production is the metric by which a candidate layout is evaluated. The Offshore Wind Farm Layout Optimization (OWFLO) project instead uses the levelized production cost as the

Christopher N. Elkinton; James F. Manwell; Jon G. McGowan

63

OFFSHORE WIND FARM LAYOUT OPTIMIZATION (OWFLO) PROJECT: AN INTRODUCTION  

Microsoft Academic Search

Optimizing the layout of an offshore wind farm presents a significant engineering challenge. Most of the optimization literature to date has focused on land-based wind farms, rather than on offshore farms. The conventional method used to lay out a wind farm combines a turbine cost model and a wake model in conjunction with an optimization routine. In offshore environments, however,

C. N. Elkinton; J. F. Manwell; J. G. McGowan

64

Titanium for offshore oil drilling  

Microsoft Academic Search

By reducing maintenance and improving component efficiency, titanium and its alloys can compete in cost with the less expensive metals traditionally used for offshore drilling equipment. Navy research has demonstrated successful applications for heat exchangers, valves, pumps, and chlorination systems; excellent possibilities for the future include deepwater production equipment, risers, prestressed riser connectors, fixtures, and fittings. For the main platform

D. F. Hasson; C. R. Crowe

1982-01-01

65

Offshore Space Center (offshore launch site)  

NASA Technical Reports Server (NTRS)

Any activity requiring the development of the HLLV can benefit by operations from an offshore space center (OSC) since operating near the equator provides a twenty percent increase in payload in an ecliptic plan orbit. Some OSC concepts considered include a moored floating (semisubmersible) design, a stationary design supported by fixed piles, and a combination of these two. The facility supports: a 15,000 foot long, 300 foot wide runway, designed to accommodate a two staged winged launch vehicle, with a one million pound payload capacity to low earth orbit; an industrial area for HLLV maintenance; an airport terminal, control and operation center, and observation tower; liquid hydrogen and liquid oxygen production and storage, and fuel storage platforms; a power generation station, docks with an unloading area; two separate launch sites; and living accommodations for 10,000 people. Potential sites include the Paramount Seamount in the Pacific Ocean off the north coast of South America. Cost estimates are considered.

Harvey, D. G.

1980-01-01

66

Offshore Space Center (offshore launch site)  

NASA Astrophysics Data System (ADS)

Any activity requiring the development of the HLLV can benefit by operations from an offshore space center (OSC) since operating near the equator provides a twenty percent increase in payload in an ecliptic plan orbit. Some OSC concepts considered include a moored floating (semisubmersible) design, a stationary design supported by fixed piles, and a combination of these two. The facility supports: a 15,000 foot long, 300 foot wide runway, designed to accommodate a two staged winged launch vehicle, with a one million pound payload capacity to low earth orbit; an industrial area for HLLV maintenance; an airport terminal, control and operation center, and observation tower; liquid hydrogen and liquid oxygen production and storage, and fuel storage platforms; a power generation station, docks with an unloading area; two separate launch sites; and living accommodations for 10,000 people. Potential sites include the Paramount Seamount in the Pacific Ocean off the north coast of South America. Cost estimates are considered.

Harvey, D. G.

1980-07-01

67

Offshore wind farm layout optimization  

NASA Astrophysics Data System (ADS)

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.

Elkinton, Christopher Neil

68

Offshore oil: an overview  

Microsoft Academic Search

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

Manners

1980-01-01

69

Activity-Based Physics  

NSDL National Science Digital Library

Activity-Based Physics aims to sustain and enhance efforts to render introductory physics courses more effective and exciting at both the secondary and college level. It uses the outcomes of physics education research along with flexible computer tools to promote activity-based models of physics instruction. This program includes the refinement of existing written materials, apparatus, instructional techniques, and computer software and hardware; the creation of new instructional materials and approaches; and dissemination. This work will be informed by a comprehensive program of classroom testing and educational research.

Hammer, David; Redish, Joe; Van Zee, Emily

2009-05-04

70

The impact of offshoring on firm competitiveness  

Microsoft Academic Search

Offshoring strategies, in spite of their continuous growth, have not always delivered the expected results: cost savings are\\u000a often much lower than expected, customers may be considerably upset, and relevant competences can be lost for the future.\\u000a This article looks at the impacts of offshoring on firm competitiveness, in the short and in the long term. The analysis is\\u000a based

Corrado Cerruti

2008-01-01

71

Offshore turnkey drilling provides new opportunities  

SciTech Connect

Is offshore turnkey drilling a viable alternative to day rate contracts. With the recent success of several offshore turnkey wells, this contractual approach may provide some unique opportunities for the industry. But the decisions required to take on such an endeavor are not easy to make, particularly when the advantages and disadvantages for offshore turnkey drilling are compared to land turnkey drilling. With only 30 of some 27,000 offshore wells drilled under turnkey contracts, the move toward turnkey drilling hasn't been overwhelming, but more contractors and operators are looking at this approach. Basically, a turnkey contract calls for drilling a loggable hole to a predetermined depth for a fixed amount of money. Should the contractor fail to deliver a usable hole, for whatever reason, he is obligated under his contract to slide his rig over and drill another hole, at no additional cost to the client.

Moore, S.D.

1984-11-15

72

Offshore oil in the Alaskan Arctic  

NASA Technical Reports Server (NTRS)

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.

Weeks, W. F.; Weller, G.

1984-01-01

73

Lost in migration: offshore need not mean outsourced  

Microsoft Academic Search

Too often large corporations assume that migrating operations offshore requires outsourcing them to another company. Global outsourcing is not always a better alternative to going it alone offshore or teaming up with a partner overseas. On the contrary, companies that set up their own operations in low-cost regions increasingly generate returns comparable to or higher than companies that outsource. What’s

Simeon Preston

2004-01-01

74

Using semantics to facilitate data integration of offshore wind farms  

Microsoft Academic Search

Operation and maintenance play an important role in extracting power from the wind, especially, in offshore wind energy where wind farms are located far off the shore and under harsh weather conditions. Improved operation and maintenance is likely to reduce costs as well as hazard exposure of the employees. Implementation of advanced information technology is thus crucial for operating offshore

Trinh Hoang Nguyen; Andreas Prinz

2012-01-01

75

Offshore yearbook, 1987  

SciTech Connect

This book is an annual compilation of information and articles on offshore petroleum operations. It includes an industry analysis, engineering highlights, a news review of the Western Hemisphere, and an industry outlook for 1987. It provides survey information on deepwater wells, worldwide offshore daily oil production, producing fields by country, and international offshore well count. It also contains mobile rig statistics, including rig scrappings, rig name changes, cold-stacked and for-sale units, and unit types.

Not Available

1987-01-01

76

Offshoring technology innovation: A case study of rare-earth technology  

Microsoft Academic Search

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

Brian J. Fifarek; Francisco M. Veloso; Cliff I. Davidson

2008-01-01

77

Synthetic Aperture Radar for Offshore Wind Resource Assessment and Wind Farm Development in the UK  

Microsoft Academic Search

The UK has an abundant offshore wind resource with offshore wind set to grow rapidly over the coming years. Optimisation of energy production is of the utmost importance given the high installation and maintenance costs of offshore turbines; accurate estimates of wind speed characteristics are critical during the planning process. While operational assessment methods which rely upon in-situ observations or

Iain Cameron; Parivash Lumsdon; Nick Walker; Iain Woodhouse

2006-01-01

78

Offshore oil drilling  

Microsoft Academic Search

The accelerated offshore leasing plan proposed by the US government will involve huge areas containing marine biological resources of considerable economic, ecological, social, and aesthetic value. Offshore drilling and onshore refining\\/processing facilities can mar the scenic beauty of an area and gradually change seabed and water conditions, while always posing the threat of a major oil spill. Environmentalists currently disagree

Hileman

1981-01-01

79

Solar power satellite offshore rectenna study  

NASA Astrophysics Data System (ADS)

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.

1980-11-01

80

Reliability model of large offshore wind farms  

Microsoft Academic Search

For investors of wind farms projects, it is indispensable to get reliable prognosis of the expected energy produced per year, taking into account technical failures and the stochastic characteristic of the wind. This applies especially for offshore wind farms with higher installation costs and difficult maintenance conditions. The repair of components located on sea may take many days or even

E. Spahic; A. Underbrink; V. Buchert; J. Hanson; I. Jeromin; G. Balzer

2009-01-01

81

Human Rights, Academic Freedom, and Offshore Academics  

ERIC Educational Resources Information Center

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)…

Ross, Andrew

2011-01-01

82

Applications for concrete offshore  

SciTech Connect

The report collects and summarizes the various proposals for development offshore which have in common the use of concrete as the main structural material, and where possible, indicates their relative feasibility. A study encompassing such diverse schemes as offshore windmills, concrete LNG carriers, hydrocarbon production platforms and floating airports cannot be completely exhaustive on each subject, so references to sources of further information have been given wherever possible. Details of individual projects and proposals are included for Power plants, Hydrocarbon production platforms, Concrete ships, Storage systems and industrial plants, Subsea systems, Offshore islands, Coastal works and Other concrete structures.

Not Available

1982-01-01

83

Offshore Pipeline Failures.  

National Technical Information Service (NTIS)

An overview of current concerns in the regulation of offshore pipelines is presented along with tabulated summaries of pipeline failure causes, failure prevention techniques, and pipeline monitoring and early intervention techniques. A database of over 10...

R. D. Woodson

1990-01-01

84

27. Annual Offshore Technology Conference: 1995 Proceedings. Volume 3: Construction and installation/field drilling and development systems  

SciTech Connect

This conference proceedings contains papers dealing with offshore platform construction and design; offshore pipeline installation and design; offshore drilling equipment and design; underwater remote control inspection and materials handling equipment; and downhole surveys and coiled tubing applications. It also contains papers dealing with the Cost Reduction Initiative for the New Era (CRINE) and other economic developments in the oil and gas industry.

NONE

1995-12-31

85

Dynamic behavior of offshore spar platforms under regular sea waves  

Microsoft Academic Search

Many innovative floating offshore structures have been proposed for cost effectiveness of oil and gas exploration and production in water depths exceeding one thousand meters in recent years. One such type of platform is the offshore floating Spar platform. The Spar platform is modelled as a rigid body with six degrees-of-freedom, connected to the sea floor by multi-component catenary mooring

A. K. Agarwal; A. K. Jain

2003-01-01

86

Offshore and Arctic operations, 1991  

SciTech Connect

This book contains the following topics: Design advantages of Beta Titanium 38-644 springs in outfield applications, Caissin support structure (CSS), Optimizing operations for offshore platform fabrication, Concrete strength evaluation of offshore structures.

Urquhart, R.G. (Maple Gas Corp. (US)); Tawfik, A.S. (Brown and Root USA, Inc. (US))

1991-01-01

87

Marine Pollution from Offshore Chemicals.  

National Technical Information Service (NTIS)

The report analyses the influencing impact on the marine environment caused by the various chemical effluents from the offshore drilling and production. The offshore chemicals used at the Statfjord and Ekofisk fields on the Norwegian Continental Shelf are...

O. Bjoerseth G. Halmoe R. Romslo T. Syvertsen

1986-01-01

88

Electrical Collection and Transmission Systems for Offshore Wind Power.  

National Technical Information Service (NTIS)

The electrical systems needed for offshore wind farms to collect power from wind turbines and transmit it to shore will be a significant cost element of these systems. This paper describes the development of a simplified model of the cost and performance ...

J. Green A. Bowen L. J. Fingersh Y. Wan

2007-01-01

89

Copenhagen Offshore Wind 2005  

Microsoft Academic Search

The planning, the special development work, and the installation of the foundations for the offshore wind parks North Hoyle in the Irish Sea and Scroby Sands in the North Sea are described. The wind parks comprise each 30 2 MW Vestas V 80 turbines. In both wind parks monopile foundations were used. They were placed in open sea in tidal

Niels-Erik Ottesen Hansen

90

The state of offshore  

SciTech Connect

In this book, the author explains the factors behind state involvement in offshore petroleum activities. From his analysis of government workings in Great Britain and Norway, he concludes that state intervention is determined by complex interactions among government officials, economic interests, and environmental pressures.

Nelson, B.F.

1991-01-01

91

Wave - Wind Offshore Systems  

Microsoft Academic Search

The 160 MW Horns Rev offshore wind farm has provided valuable inputs for the planning of substantially larger plants. The lessons learnt include problems associated with deployment, issues concerning operation and maintenance, the need for wind forecasts and grid interaction issues. As many such installations are being planned at water depths of 10 m or so lead one to conjecture

T. Geetha; Boby George; V. Jayashankar

92

Solar power satellite offshore rectenna study. Final report  

SciTech Connect

Rice University, Brown and Root Development Inc., and Arthur D. Little Inc. have jointly conducted a feasibility study of an offshore rectenna serving the Boston/New York area. We 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. We began by engineering the reference system rectenna to the offshore location. When we estimated costs for the resulting system we found that the cost was prohibitively high. We then searched for modifications to the design which would allow significant cost reduction. The result is a non-ground 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 or yagis supported on feed wires. We find that 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. It is important to note that 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 substantially 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.

Not Available

1980-05-01

93

Research on an innovative large-scale offshore wind power seawater desalination system  

Microsoft Academic Search

For high cost, hard grid connection and low failure probability for large-scale offshore wind power, an innovate seawater desalination system is proposed. It directly couples offshore wind power with high energy-consuming seawater desalination to a new and full one. The system uses 100%off-shore wind power and adopts variable condition optimal control to maintain energy consumption per unit when fresh water

Xiaobin He; Chufu Li; Weidong Gu

2010-01-01

94

Review of Methodologies for Offshore Wind Resource Assessment in European Seas  

Microsoft Academic Search

The wind resource offshore is generally larger than at geographically nearby onshore sites, which can offset the higher installation,\\u000a operation and maintenance costs associated with offshore wind parks. Successful offshore wind energy development relies to\\u000a some extent on accurate prediction of wind resources, but since installing and operating a meteorological mast in situ is expensive, prospective sites must be carefully evaluated.

A. M. Sempreviva; R. J. Barthelmie; S. C. Pryor

2008-01-01

95

Offshore arctic structure  

SciTech Connect

An apparatus is disclosed for minimizing the horizontal forces on an offshore arctic structure due to ice movement. The structure includes a base portion, sloped side walls and a smooth, unobstructed portion. The structure is substantially submerged in a body of water with the top portion at or near the water surface permitting floating ice sheets which strike the side walls to flex slightly upward and advance along and over the structure without substantially destroying the overall integrity of ice sheet. In this manner, the horizontal forces on the structure resulting from the ice sheet are minimized due to the elimination of a crushing failure mode of the ice sheet commonly associated with conventional offshore arctic structures.

Weiss, R.

1983-08-09

96

Arctic offshore platform  

SciTech Connect

An offshore structure is disclosed for use in drilling and producing wells in arctic regions having a conical shaped lower portion that extends above the surface of the water and a cylindrical upper section. The conical portion is provided with a controlled stiffness outer surface for withstanding the loads produced by ice striking the structure. The stiffness properties of the outer shell and flexible members are designed to distribute the load and avoid high local loads on the inner parts of the structure.

Bhula, D.N.

1984-01-24

97

Offshore finds inspire optimism  

SciTech Connect

The author reviews the oil market in Australia and the Pacific. Some of the highlights are: Australia/Pacific drilling hit 308 in 1987; about 300 seen for 1988; Offshore holds action in New Zealand, while onshore Papua makes news; Reduced taxes, relaxed foreign investment rules aid Aussie development work; Four solid solid discoveries made in Papua's Southern Highlands in 18 months; and Austrialia and New Zealand enact industry degregulation measures.

Not Available

1988-08-01

98

Offshore wind modelling and forecast  

Microsoft Academic Search

Offshore wind power projects are critically reliant on accurate wind resources assessment and large offshore wind farm operations require timely weather forecast. Most often, however, the offshore measurement is scarce and a conventional 6 hourly large scale weather model outputs with a typical resolution 0.5º x 0.5º is rather limited in application. The lack of measurement and the need for

Jiri Beran; Barbara Jimenez; Abha Sood

99

New Modeling Tool Analyzes Floating Platform Concepts for Offshore Wind Turbines (Fact Sheet)  

SciTech Connect

Researchers at the National Renewable Energy Laboratory (NREL) developed a new complex modeling and analysis tool capable of analyzing floating platform concepts for offshore wind turbines. The new modeling tool combines the computational methodologies used to analyze land-based wind turbines with the comprehensive hydrodynamic computer programs developed for offshore oil and gas industries. This new coupled dynamic simulation tool will enable the development of cost-effective offshore technologies capable of harvesting the rich offshore wind resources at water depths that cannot be reached using the current technology.

Not Available

2011-02-01

100

Optimal Electric Network Design for a Large Offshore Wind Farm Based on a Modified Genetic Algorithm Approach  

Microsoft Academic Search

The increasing development of large-scale offshore wind farms around the world has caused many new technical and economic challenges to emerge. The capital cost of the electrical network that supports a large offshore wind farm constitutes a significant proportion of the total cost of the wind farm. Thus, finding the optimal design of this electrical network is an important task,

Francisco M. Gonzalez-Longatt; Peter Wall; Pawel Regulski; Vladimir Terzija

2012-01-01

101

Technology for developing marginal offshore oilfields  

SciTech Connect

It has been estimated that approximately 800 marginal offshore oilfields exist worldwide. Therefore, marginal field technology will represent a major factor in the future of oil and gas developments. This review covers this very broad topic. The basic technology and its current applications are examined, future systems are assessed and operational and cost data from existing marginal field development schemes are presented. CONTENTS: Preface. Chapter 1: The Challenge of Marginal Fields. 1.1 What is a Marginal Field. 1.2 Offshore Oil Technology-An Historical Perspective. Chapter 2: Elements of a Marginal Field Development Scheme. 2.1 Production Supports. 2.2 Risers. 2.3 Subsea Equipment. 2.4 Storage. 2.5 Offshore Loading Systems. 2.6 Processing Facilities. Chapter 3: Existing Marginal Field Technology. 3.1 Introduction. 3.2 Jack-Up Systems. 3.3 Semi-Submersible Systems. 3.4 Monohull Based Systems. 3.5 Other Relevant Systems. Chapter 4: Current and Future Marginal Field Development Concepts. 4.1 Concepts Based on the Use of a Semi-Submersible. 4.2 Concepts Based on the Use of a Tanker Production Support. 4.3 Concepts Based on the Use of a Jack-up Production Support. 4.4 Concepts Based on Articulated Towers. 4.5 Concepts for Deepwater. 4.6 Extended Well Production Testing. Chapter 5: Construction and Operating History of North Sea Floating Production Systems. 5.1 The Argyll Experience. 5.2 The Buchan Experience. Chapter 6: Marginal Field Economics and Costs. 6.1 Cost Parameters: Their Relative Importance and Sensitivity. 6.2 Cost Elements for Marginal Field Production Systems. Bibliography. Appendix 1: Conversion Factors. Appendix 2: Glossary of Terms. Index.

Fee, D.A.; O'Dea, J.

1986-01-01

102

U.S. Offshore Wind Manufacturing and Supply Chain Development  

SciTech Connect

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.

Hamilton, Bruce Duncan [Navigant Consulting, Inc.

2013-02-22

103

Offshore~WMEP - Monitoring offshore wind energy use  

Microsoft Academic Search

Offshore wind energy use is commonly suggested to play an important role in future electricity supply. However, long-term experience with thousands of onshore wind turbines explicitly hint on possible barriers for a save, efficient, economic and user friendly supply relying on offshore wind energy. A national German programme shall on the one hand support the wind energy branch improving technology

P. Lyding; S. Faulstich; B. Hahn; D. Callies

104

Offshore outlook: the American Arctic  

SciTech Connect

Offshore areas in the American Arctic are highlighted and the development of the area is compared with other offshore areas where the required technology is more readily available. Principal areas are shown in which new concepts are being put to practice. Canada's east coast is examined. Several technological trends are reviewed to help operators accelerate the discovery and development of arctic petroleum reserves.

Jahns, M.O.

1985-05-01

105

Offshore oil: Technology - and emotion  

Microsoft Academic Search

Drilling and search techniques used in the exploitation of off-shore oil reserves are discussed. An overview is given of major government policy statements regarding the use of the outer continental shelf for oil production. The risk of detrimental effects on the environment caused by oil spills from off-shore drilling or damage to benthic animals is considered.

K. O. Emery

1976-01-01

106

Offshore oil prospects improve  

NASA Astrophysics Data System (ADS)

The issues, prospects, and environmental concerns about drilling for offshore oil and gas are being seen in a different light than at any other time during the past decade. Exploration drilling on offshore locations is proceeding at a high rate, and environmental concerns, while recognized as real, appear to be a lot less worrisome than might have been predicted a decade ago. Part of the reason for the changes in levels of concern results from the close monitoring programs that have been in effect for the past few years. Paul R. Ryan of the Woods Hole Oceanographic Institution recently described exploration activities on Georges Bank: “We now have the results of the first year of monitoring, and, although eight wells are considered a minimal observational test, there were no biological changes in the benthic community that could be attributed to drilling activity.” (Oceanus, 26, 2, 1983). The U.S. Geological Survey studied the Georges Bank drilling activities as well. Barium from drilling muds was detected at the sites, but in decreasing concentrations at distances away from drilling rigs. There was no evidence that the discharges caused biological changes. According to Ryan: “Postdrilling concentrates of barium were found to be within the range of predilling concentrations measured at other locations on the Bank. Concentrations of other metals measured were low and characteristic of unpolluted, coarse-grained sediment in other Continental Shelf areas.”

107

Offshore production challenged  

SciTech Connect

The capability to produce oil fields from under 20,000 ft of water or below the thick and treacherous Arctic icepack are 2 of the breakthroughs that have been brought about by a quietly emerging technology. A scan of announcements by designers, contractors, operators, and manufacturers reveals that substantial research and development efforts are being undertaken to ease the task of bringing to market the energy resources trapped under presently inaccessible locations. As a result, entirely new breeds of permanent or temporary drilling/production systems are evolving, some of which could be scaled down to face still another challenge: the economic exploitation of marginal offshore fields, whose meager reserves do not justify development by conventional means. New offshore systems described include the mobile Arctic drilling system, the mobile concrete island drilling system, the base and independent deck platform, the buoyant tower, the semiflex floating station, the tension leg platform, the big buoy floating cylinder, and the Sea Plex retrievable drilling/production system.

Franco, A.

1983-10-01

108

Floating offshore structure  

SciTech Connect

A floating offshore structure which is moored at a fixed position on the sea by means of mooring hawsers and anchors connected to the ends thereof respectively for conducting a submarine excavating operation from a deck of the structure. The structure includes a moorage hull part provided with a vertical through-hole formed therein for receiving an excavating drill pipe and the mooring hawsers and a movable hull part connected to the moorage hull part so as to be rotatable within a horizontal plane. The movable hull part is constituted as a hull defining the outer wall of the floating offshore structure and connected with the moorage hull part by inserting it into a moorage hull part receiving hole formed at a position closer to the bow thereof. The movable hull part has near its water plane a horizontal section with a substantially oval shape formed by a fore draft part in a substantially circular or polygonal shape, with the moorage hull part receiving hole as a center and an after draft part taperingly projecting aft from the fore draft part.

Oshima, M.; Narita, H.; Tabuchi, H.; Yashima, N.

1985-05-28

109

Neutral earthing in off-shore wind farm grids  

Microsoft Academic Search

The maintenance of offshore wind farms is more complicated than those onshore. The effort associated with cable repairs in terms of time and cost is much larger compared to I similar tasks in conventional distribution grids. Current and voltage stress of the grid following the most common single phase to ground fault primarily affected by the type of transformer connection

R. van de Sandt; J. Lowen; J. Paetzold; I. Erlich

2009-01-01

110

Using airborne and satellite SAR for wake mapping offshore  

Microsoft Academic Search

Offshore wind energy is progressing rapidly around Europe. One of the latest initiatives is the installation of multiple wind farms in clusters to share cables and maintenance costs and to fully exploit premium wind resource sites. For siting of multiple nearby wind farms, the wind turbine wake effect must be considered. Synthetic aperture radar (SAR) is an imaging remote sensing

Merete B. Christiansen; Charlotte B. Hasager

2006-01-01

111

Mobile Offshore Base (MOB) Science and Technology Program.  

National Technical Information Service (NTIS)

This report summarizes the Science and Technology Program conducted by the Office of Naval Research to investigate the feasibility and cost of a Mobile Offshore Base (MOB). A MOB is envisioned as a self-propelled, floating platform, comprised of one or mo...

2000-01-01

112

Grid power integration technologies for offshore ocean wave energy  

Microsoft Academic Search

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

Tarek Ahmed; Katsumi Nishida; Mutsuo Nakaoka

2010-01-01

113

The wind speed profile at offshore wind farm sites  

Microsoft Academic Search

The first large offshore wind farms are in the planning phase in several countries in Europe. Their economic viability depends on the favourable wind conditions compared to sites on land. The higher energy yield has to compensate the additional installation and maintenance cost. For project planning and siting a reliable prediction of the wind resource is therefore crucial. For turbine

Bernhard Lange; S. E. Larsen; Jørgen Højstrup; Rebecca Barthelmie

2003-01-01

114

Supporting offshoring and nearshoring decisions for mass customization manufacturing processes  

Microsoft Academic Search

Offshore countries attract companies for a possible relocation of production processes through extremely low worker wages. Particularly, mass production processes seem to be highly appropriate for a relocation. However, while the impact of wage reductions can be directly estimated, an appropriate determination of additional cost consequences proves to be a complex task. For instance, on account of lower education standards

Stefan Bock

2008-01-01

115

EPA moves to control offshore emissions  

SciTech Connect

This paper reports that except for most of the Gulf Coast, the Environmental Protection Agency proposes to hold all U.S. offshore rigs and platforms within about 28 miles from shore to the same standards as onshore facilities. EPA estimated compliance will cost the oil industry $2.2 million/year for all sources on the Outer Continental Shelf. The rule, the first EPA has proposed to control air pollution from OCS operations, covers drilling and production off Alaska, the Pacific coast states, the Atlantic coast states, and the Florida Gulf Coast. It does not affect OCS areas off Texas, Louisiana, Mississippi, and Alabama.

Not Available

1991-12-09

116

Economics of the offshore contract drilling industry: implications for the operator  

SciTech Connect

This paper represents a general assessment of the primary factors driving the market for mobile offshore drilling rigs and the utility of those factors as choice variables for the offshore drilling program planner. A general framework is discussed which may be useful to the operator seeking additional control of rig costs or a means of realistically planning for the cost of future programs. 4 refs.

Rankin, M.D.

1981-01-01

117

Fair shares: a preliminary framework and case analyzing the ethics of offshoring.  

PubMed

Much has been written about the offshoring phenomenon from an economic efficiency perspective. Most authors have attempted to measure the net economic effects of the strategy and many purport to show that "in the long run" that benefits will outweigh the costs. There is also a relatively large literature on implementation which describes the best way to manage the offshoring process. But what is the morality of offshoring? What is its "rightness" or "wrongness?" Little analysis of the ethics of offshoring has been completed thus far. This paper develops a preliminary framework for analyzing the ethics of offshoring and then applies this framework to basic case study of offshoring in the U.S. The paper following discusses the definition of offshoring; shifts to the basic philosophical grounding of the ethical concepts; develops a template for conducting an ethics analysis of offshoring; applies this template using basic data for offshoring in the United States; and conducts a preliminary ethical analysis of the phenomenon in that country, using a form of utilitarianism as an analytical baseline. The paper concludes with suggestions for further research. PMID:19629753

Gordon, Cameron; Zimmerman, Alan

2010-06-01

118

Bahrain's offshore banking center  

SciTech Connect

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)

Gerakis, A.S.; Roncesvalles, O.

1983-01-01

119

Ice interaction with offshore structures  

SciTech Connect

Oil platforms and other offshore structures being built in the arctic regions must be able to withstand icebergs, ice islands, and pack ice. This reference explain the effect ice has on offshore structures and demonstrates design and construction methods that allow such structures to survive in harsh, ice-ridden environments. It analyzes the characteristics of sea ice as well as dynamic ice forces on structures. Techniques for ice modeling and field testing facilitate the design and construction of sturdy, offshore constructions. Computer programs included.

Cammaert, A.B.; Muggeridge, D.B.

1988-01-01

120

1982 Transactions of the American Association of Cost Engineers  

Microsoft Academic Search

This book presents the technical papers given at sixteen symposia covering the subjects of capital cost control, capital cost estimating, construction cost management, management science, planning and scheduling, computer applications, productivity, operating\\/manufacturing costs, life cycle costs, utility cost management, energy costs, material control, engineering economics, education, conflict management, and project management. Topics considered include planning risk analysis in offshore projects,

K. K. Humphreys; B. Humphreys; B. G. McMillian

1982-01-01

121

Structural Health and Prognostics Management for Offshore Wind Turbines: An Initial Roadmap.  

National Technical Information Service (NTIS)

Operations and maintenance costs for offshore wind plants are expected to be significantly higher than the current costs for onshore plants. One way in which these costs may be able to be reduced is through the use of a structural health and prognostic ma...

B. R. Resor D. T. Griffith J. A. Paquette J. R. White N. C. Yoder

2012-01-01

122

Meren field water injection project offshore Nigeria  

SciTech Connect

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.

Adetoba, L.A.

1984-04-01

123

Auditing offshore safety risk assessments  

SciTech Connect

Risk assessments submitted to support proposals for offshore operations must be audited to ensure conformance with regulating authorities' safety requirements. This paper outlines the approach adopted for auditing recent submissions to the U.K. Dept. of Energy for simultaneous drilling and production (SDP) with jackup rigs cantilevered over gas production platforms. The principles are valid for risk-assessment audits of other offshore installations.

Moss, T.R. (RM Consultants Ltd. (GB))

1990-10-01

124

Mixing offshore oil and politics  

Microsoft Academic Search

This article discusses the opposition of coastal states to offshore oil drilling and how this opposition is slowing the U.S. government's plans for offshore oil exploration. In 1983, it is cited that exploration of off-coastal-states drilling dropped to about 54% of what it was two years earlier, a reflection of both leasing problems and decreasing oil and natural gas prices.

1984-01-01

125

Offshore pollution prevention  

SciTech Connect

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 which is relatively free of solid particles (less than 50 microns) is then treated in a water washer with a portion which is relatively rich in solid particles further treated in a solids cleaner. In the water washer 90% or more oil droplets (less than 50 microns) is removed from the produced water and the relatively oil free water is then disposed by way of a skim pile. A portion of fluid from the water washer is further treated in a high efficiency skimmer. In the solids cleaner a conical corrugated plate arrangement having periodic agitation by sand cleaning eductors removes free oil from the solids rich portion of the fluid which is relatively rich in solid particles and passes a relatively oil free and solids rich portion to a skim pile for disposal. Drained fluids from exposed decks and elsewhere are supplied directly to the skim pile for oil removal prior to passage into the surrounding body of water.

Favret, U.B. Jr.

1984-01-31

126

Structure for offshore exploitation  

SciTech Connect

A structure is disclosed for use in exploiting arctic offshore areas where floating ice masses may be present. The structure is comprised of a floating hull having ice-breaking capabilities which is moored by a plurality of mooring means which extend vertically from a moonpool in the hull to the marine bottom directly under the hull. The mooring means comprises flexible lines, e.g. nylon, steel, or the like or rigid conduits, e.g. drill pipe. Means are provided within the moonpool for tensioning the mooring means to thereby draw the hull downward to a position below its normal buoyant position thereby substantially eliminating vertical heaving of the hull. When an ice mass contacts the hull, tension on the mooring means is relaxed to thereby allow the hull to rock upward against the ice thereby generating the forces necessary for the ice-breaking operation. Due to the present mooring means, the hull moves only a relatively short lateral distance in breaking an approaching ice mass. This is important in floating drilling operations. Further, if repair or replacement of a mooring means is required, this can be accomplished even when ice surrounds the hull since the mooring means are anchored directly below the hull and are easily accessible through the moonpool.

Gerwick, B.C. Jr.; Hatcher, S.J.

1984-02-28

127

Combination offshore drilling rig  

SciTech Connect

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 respect to such barge hull, the cantilever structure being so located relative to the drilling slot as to be movable horizontally into a position in vertical alignment with the drilling slot, a derrick and drilling machinery mounted to the cantilever structure and movable into a position above the drilling slot whereby well drilling operations may be conducted through the drilling slot, the cantilever structure also being movable horizontally to a position which locates the derrick and the drilling machinery outboard of the peripheral boundary of the barge hull, whereby a drilling operations may be conducted outside of the peripheral boundary of the barge hull, means mounted on the barge hull for moving the cantilever structure horizontally to different positions relative to the barge hull.

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

1986-07-29

128

Directional calibrated wind and wave reanalysis databases using instrumental data for optimal design of off-shore wind farms  

Microsoft Academic Search

An important part of the future expan- sion of wind energy utilisation will come from offshore sites. The economic viability of offshore wind farms depends on the favourable wind conditions compared to sites on land, compensating the additional instal- lation and maintenance costs. For project planning and sitting, especially for large projects, a reliable prediction of the wind resource and

A. Espejo; R. Minguez; A. Tomas; M. Menendez; F. J. Mendez; I. J. Losada

2011-01-01

129

Analyzing the Deployment of Large Amounts of Offshore Wind to Design an Offshore Transmission Grid in the United States: Preprint  

SciTech Connect

This paper revisits the results from the U.S. Department of Energy's '20% Wind Energy By 2030' study, which envisioned that 54 GW of offshore wind would be installed by said year. The analysis is conducted using the Regional Energy Deployment System (ReEDS), a capacity expansion model developed by the National Renewable Energy Laboratory. The model is used to optimize the deployment of the 54 GW of wind capacity along the coasts and lakes of the United States. The graphical representation of the results through maps will be used to provide a qualitative description for planning and designing an offshore grid. ReEDS takes into account many factors in the process of siting offshore wind capacity, such as the quality of the resource, capital and O&M costs, interconnection costs, or variability metrics (wind capacity value, forecast error, expected curtailment). The effect of these metrics in the deployment of offshore wind will be analyzed through examples in the results.

Ibanez, E.; Mai, T.; Coles, L.

2012-09-01

130

76 FR 11503 - National Offshore Safety Advisory Committee; Vacancies  

Federal Register 2010, 2011, 2012, 2013

...specializing in the support, by offshore supply vessels or other vessels, of offshore mineral and oil operations including geophysical...and training related to offshore exploration and construction...specializing in offshore drilling. To be eligible,...

2011-03-02

131

76 FR 39410 - National Offshore Safety Advisory Committee; Vacancies  

Federal Register 2010, 2011, 2012, 2013

...specializing in the support, by offshore supply vessels or other vessels, of offshore mineral and oil operations including geophysical...representing construction of offshore exploration and recovery...specializing in offshore drilling; and, (e) One...

2011-07-06

132

Offshore technology: Doing more with fewer $$$  

SciTech Connect

The past 12 months could not be mistaken for the golden age of offshore technology. No stupendous projects were launched, the Arctic, always good for world-class engineering feats, collapsed, and the hottest project in the Lower 48-Placid's Green Canyon development-may be stillborn. Yet, there are positive elements in the picture. Manufacturers seem to have recaptured a sense of reality about customer needs that was lacking during those halcyon days of yore when the problem with RandD budgets was figuring out how to spend the money faster. Now the emphasis is on practical and cost-effective solutions to real problems. The Hydril subsea diverter, if it works even remotely as well as the specs indicate, should save lives and rigs, not to mention lawsuits and litigation. Cameron's new tubular connector, which cold-forges pipe connections, could go a logn way toward replacing welders, divers and large workboats. Other noteworthy developments include the increased transfer of electronics into the offshore environment. In a joint effort with Sonardyne, APT developed a system of long-term reservoir monitoring that could add new precision to reservoir management. A global positioning system from Norway refines Navstar satellite signals to yield a positional accuracy of 33 ft.

Dempsey, P.; Abraham, K.S.

1987-04-01

133

Offshore Renewable Energy R&D (Fact Sheet)  

SciTech Connect

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.

Not Available

2011-10-01

134

Geotechnics of Fixed Offshore Drilling Platforms.  

National Technical Information Service (NTIS)

Fixed offshore-structures are widely used for exploration and exploitation of undersea oil and gas resources. The object of this report is to survey the general geotechnical design principles and foundation technics of fixed offshore-structures. Additiona...

J. Toernqvist

1984-01-01

135

Offshore '76: how Dome plans to drill in the Arctic's Beaufort Sea. [Equipment and drilling costs, subsea site preparation, environmental protection requirements, and possible hole, casing, mud, and cement programs  

Microsoft Academic Search

Operations on what is projected to be the most expensive well ever drilled will begin next month when Dome Petroleum Ltd. of Canada spuds the Tingmiark K-91 in the Beaufort Sea of northern Canada. Discussed here are anticipated costs, special environmental precautions taken and the drilling program.

Thomas

1976-01-01

136

Superconducting light generator for large offshore wind turbines  

NASA Astrophysics Data System (ADS)

Offshore wind market demands higher power rate and reliable turbines in order to optimize capital and operational cost. These requests are difficult to overcome with conventional generator technologies due to a significant weight and cost increase with the scaling up. Thus superconducting materials appears as a prominent solution for wind generators, based on their capacity to held high current densities with very small losses, which permits to efficiently replace copper conductors mainly in the rotor field coils. However the state-of-the-art superconducting generator concepts still seem to be expensive and technically challenging for the marine environment. This paper describes a 10 MW class novel direct drive superconducting generator, based on MgB2 wires and a modular cryogen free cooling system, which has been specifically designed for the offshore wind industry needs.

Sanz, S.; Arlaban, T.; Manzanas, R.; Tropeano, M.; Funke, R.; Ková?, P.; Yang, Y.; Neumann, H.; Mondesert, B.

2014-05-01

137

Scour around an offshore platform  

SciTech Connect

On the whole offshore scour has proved less of a problem than one might fear without being overly pessimistic, based on experience from other hydrotechnical works. The offshore setting, the environment as well as the structures, was simply beyond the reach to which conventional concepts and models could be safely extrapolated. The essentially empirical art of sediment engineering had to acquire a new empirical base. Today we know a lot more than we did a decade ago, however, our knowledge is still fragmentary, and we have no unifying theory yet.

Carstens, T.

1983-01-01

138

Maritime and offshore structure maintenance  

SciTech Connect

This volume provides the most up-to date material available on methods of keeping maritime installations operational. It also draws out the exceptionally valuable expertise that has been gained from servicing the major installations in the North Sea and elsewhere in the world. Subjects cover maintenance and repair including a detailed analysis of structural maintenance on specific structures. Papers include expertise in North Sea structures, corrosion protection of a North Sea platform, maintenance of ports overseas, East Africa, low maintenance concrete and maintenance of steel offshore structures. Guidelines are also included for the inspection and maintenance of marine facilities and offshore installations.

Not Available

1986-01-01

139

Offshore fares well in energy storm  

SciTech Connect

The effects of the worldwide economic slowdown on the energy industry in general, and offshore petroleum production activity, in particular is discussed. The world crude oil supply is reviewed, and the effects of the petroleum glut are evaluated for onshore and offshore activity. Offshore drilling has fared better than most of the other energy industry sectors, primarily because major operators, worldwide, still view the offshore as the prime province for large oil discoveries, particularly in the United States. (JMT)

Ball, E.R.

1982-05-01

140

Hibernia: the next generation of offshore platform control systems  

Microsoft Academic Search

CIE-computer-integrated enterprise-technically best describes the Hibernia's new Grand Banks, Newfoundland, offshore drilling and production platform. Designed and constructed in an era of oil company belt-tightening, Hibernia takes advantage of modern technology to achieve the goal of a safe, cost-effective control system design. Some of the design criteria used in the control system design are discussed: system operability, training, safety, maintainability,

R. Gobrick; N. Legge

1996-01-01

141

Handling the pressure on an offshore rig.  

PubMed

The chief instigator of offshore stress is time which in oil parlance is money, writes Patrick Whyte, an offshore medical officer. He explains that medical personnel by showing that they practice a healthy lifestyle on the offshore oil rigs can set a practical example of coping with the stressful conditions. PMID:1775283

Whyte, P

1991-11-01

142

No slack for offshore workover industry  

Microsoft Academic Search

The lack of good drilling prospects offshore, the increasing value of current hydrocarbon production and the age of many OCS wells are all serving to make workover operations offshore a highly viable industry. Offshore operators are finding it cheaper to obtain added production through workovers than exploration. Virtually every producing well becomes deficient at some time in its life span

1978-01-01

143

Eighteenth annual offshore technology conference. Volume 1  

SciTech Connect

These sixty papers were given at a conference on offshore technology. Topics covered include friction effects of driving piles into sea beds of various compositions, wave forces on offshore platforms, stability, materials testing of various components such as plates, legs, wellheads, pipe joints, and protection of offshore platforms against ice and collision with icebergs.

Not Available

1986-01-01

144

OFFSHORE ARCTIC PIPELINE OIL SPILL RISK ASSESSMENT  

Microsoft Academic Search

While offshore arctic pipelines have been under consideration for more than 25 years, few have been built. Renewed interest in offshore arctic oil and gas has necessitated the design of pipelines capable of both overcoming the technical challenges of the arctic offshore environment and minimizing the risk to it. This paper describes a quantitative risk assessment completed by BMT Fleet

A. Dinovitzer; R. Lazor; D. Hinnah

2004-01-01

145

Measuring safety climate on offshore installations  

Microsoft Academic Search

The human and organizational factors affecting safety were examined on 10 offshore installations using the Offshore Safety Questionnaire. The questionnaire contained scales measuring work pressure and work clarity, job communication, safety behaviour, risk perception, satisfaction with safety measures and safety attitudes. A total of 722 UK offshore workers (33% response rate) from a range of occupations completed and returned the

Kathryn Mearns; Rhona Flin; Rachale Gordon; Mark Fleming

1998-01-01

146

Efficiency of HVAC power transmission from offshore-windmills to the grid  

Microsoft Academic Search

For large offshore windparks far away from the coast, not only the investment costs of the transmission system but, moreover, the costs of the transmission losses play a decisive role for the economy of the total power system. In this paper some basic problems in determining the losses of HVAC transmission systems are discussed, taking into account the longitudinal distributions

H. Brakelmann

2003-01-01

147

Offshore oil exploration and exploitation  

SciTech Connect

Exploration and drilling for petroleum in the North Sea is described. There are about 30 rigs drilling in the North Sea at present. Precautions, regulations and liability in such drilling are described. In the world at the end of 1978, there were about 400 rigs of various types drilling for oil offshore. (LTN)

Not Available

1980-03-01

148

Designing “quiet” into offshore projects  

Microsoft Academic Search

This paper provides some design guidance to assist in addressing and controlling underwater noise of an offshore project-be it oil rig, wind turbine, tidal power or other structure floating on the water or bottom mounted. The importance of a Plan to address and abate noise in order to achieve an underwater-radiated noise goal will be highlighted. The Plan's elements usually

R. W. Fischer

2010-01-01

149

Foundations for offshore wind turbines.  

PubMed

An important engineering challenge of today, and a vital one for the future, is to develop and harvest alternative sources of energy. This is a firm priority in the UK, with the government setting a target of 10% of electricity from renewable sources by 2010. A component central to this commitment will be to harvest electrical power from the vast energy reserves offshore, through wind turbines or current or wave power generators. The most mature of these technologies is that of wind, as much technology transfer can be gained from onshore experience. Onshore wind farms, although supplying 'green energy', tend to provoke some objections on aesthetic grounds. These objections can be countered by locating the turbines offshore, where it will also be possible to install larger capacity turbines, thus maximizing the potential of each wind farm location. This paper explores some civil-engineering problems encountered for offshore wind turbines. A critical component is the connection of the structure to the ground, and in particular how the load applied to the structure is transferred safely to the surrounding soil. We review previous work on the design of offshore foundations, and then present some simple design calculations for sizing foundations and structures appropriate to the wind-turbine problem. We examine the deficiencies in the current design approaches, and the research currently under way to overcome these deficiencies. Designs must be improved so that these alternative energy sources can compete economically with traditional energy suppliers. PMID:14667305

Byrne, B W; Houlsby, G T

2003-12-15

150

Geology of offshore central California  

Microsoft Academic Search

The offshore central California margin records Mesozoic and Cenozoic events attributable to continental and oceanic plate interactions. Terranes, some carried thousands of kilometers northward on the Kula and\\/or Farallon plates, were accreted to North America by late Eocene. Following accretion to North America, terranes along the margin were silvered and redistributed by strike-slip motion along the San Andreas and related

D. S. McCulloch; S. D. Lewis

1988-01-01

151

Offshore oil: Correctness of perspective  

Microsoft Academic Search

Except for the Gulf of Mexico, the offshore oil industry has been virtually banned from the US Exclusive Economic Zone for ten years. The oil potential in Alaska's Arctic National Wildlife Refuge (ANWR) is also off limits. The Gulf of Mexico is the only place with prospects for future success and a number of companies both large and small are

1993-01-01

152

Service bases for offshore oil  

Microsoft Academic Search

In January 1978, the U.S. Department of the Interior will sell leases allowing drilling for oil and gas in an area of the North Atlantic called Georges Bank, which is approximately 200 miles south east of Maine. The first onshore facilities established to support offshore drilling operations are Service Bases, which serve as the logistical link between onshore suppliers and

C. S. Colgan; J. Lindvall

1977-01-01

153

NCCCP: Cost Study  

Cancer.gov

For this element of the evaluation, RTI developed a data collection protocol that identified the various resource units and their respective costs. RTI used the various core components of NCCCP in deriving activity-based costs wherein each of the core components was considered a separate activity.

154

Pipelaying in artic offshore waters  

SciTech Connect

The present invention provides a method and apparatus for constructing pipelines in Arctic offshore waters by a directional drilling technique, thereby minimizing exposure to ice gouging and eliminating the hazards associated with unstable permafrost. A special drilling-pipe-line construction vessel is also provided which has a conical shape with reinforced outer walls to resist ice forces, which vessel includes means to install deep underground pipeline segments and means to connect and protect the pipe ends.

Langner, C. G.

1985-11-19

155

Offshore compressor station under way  

Microsoft Academic Search

Stingray Pipeline Co.'s offshore compressor station in West Cameron Block 509 of the Gulf of Mexico will, upon completion, process over 1 billion CF\\/day of natural gas. Six 3400-hp Solar Centaur recuperated-cycle gas turbine compressors will be used in the compressor facilties, which include a jacket, cellar deck, piping deck, and compressor deck. The 88 x 165 ft station, which

Ewing

1975-01-01

156

Offshore-plant economics bared  

Microsoft Academic Search

Pace Marine Engineering Systems, Inc.'s study of the economics of 200 specific types of offshore natural-gas processing plants takes no firm position either for or against plants built on marine platforms, concluding that the return on investment varies considerably with plant size, natural-gas price, water depth, product delivery distance, and other factors. Pace does note that LNG manufacture on an

Prescott

1976-01-01

157

Offshore northern Europe activity begins a slow recovery  

SciTech Connect

The offshore industry in northwest Europe has begun its recovery. Investment in new oil projects has resumed, reflecting growing confidence that the $18/bbl crude price is sustainable. Renewed spending on oil projects has also been helped by revamping offshore projects to reduce costs and make new development viable at lower prices. Industry confidence in the North Sea was also given a boost by the decision to proceed with the $7.8 billion development of the Troll and Sleipner gas fields. Drilling activity is also starting to recover. Since the beginning of this year, 14 rigs have been brought back into service and there are now 50 semisubmersibles and jack ups active on exploration and appraisal work. There were 88 rigs operating at the start of 1986, and there are still 61 rigs stacked in northwest Europe.

Vielvoye, R.

1987-06-29

158

Offshore and arctic frontiers -structures, ocean mining  

SciTech Connect

The systematic development of offshore technology is discussed. Today, this technology enables the production of approximately 14 million barrels of oil per day, or 26% of oil production worldwide. The evolution in offshore structures is examined with emphasis on jacket and jackup platforms. Challenges are explored. Microprocessors, data-base management, and artificial intelligence are mentioned as having an impact on the offshore and arctic oil industry.

Chung, J.S.

1985-05-01

159

1991 worldwide offshore contractors and equipment directory  

SciTech Connect

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.

Not Available

1991-01-01

160

78 FR 18614 - National Offshore Safety Advisory Committee  

Federal Register 2010, 2011, 2012, 2013

...and other matters affecting the oil and gas offshore industry. These meetings are...Areas on Foreign Flag Mobile Offshore Drilling Units (MODUs); (c) Safety...Register notices that affect the offshore industry; (4) USCG Outer...

2013-03-27

161

Advanced synthetics balance environmental, cost factors  

SciTech Connect

This paper briefly reviews the history of drilling fluid development for the offshore oil and gas industry. It describes the types of fluids first used in the North Sea and Gulf of Mexico and the changes which have had to develop as a result of more stringent environmental regulations. The paper goes on to describe the future of offshore, environmentally friendly drilling fluids and the estimated cost associated with them. It culminates with methods to reduce cost by making drilling fluid selection based on the local environmental regulations, the expected well environment, and ultimate performance and cost of the fluid.

NONE

1995-10-01

162

Offshore drilling and production structure  

SciTech Connect

The invention relates to an off-shore marine structure that provides an elevated support for a drilling and/or production platform. A structure comprised of three interlocking components is provided, the first component being a large foundation base installed on the sea bed; the second being a conical shaped support component which is engagable with the foundation base and which, releasably carries the third platform supporting component. In the preferred form, the platform supporting component comprises a centrally-disposed vertical column, means being provided to facilitate engagement of the column with the platform and the second component and to subsequently elevate the platform to an operating height above sea level.

Crockett, R.K.; Palmer, H.E.; Stenning, D.G.

1982-02-09

163

Wave slamming on offshore structures  

NASA Astrophysics Data System (ADS)

Experimental and theoretical work on the slamming of circular cylinders is surveyed. Data are included from controlled drop tests. The influence of inclined impact and beam dynamics on the resulting stresses is calculated for a wide range of wave conditions. The statistical distributions of the estimated stresses are analyzed to provide data for the calculation of slamming loads on fixed offshore structures using simple formulas in which the slamming coefficients incorporate both the member dynamics and the sea wave statistics. Slamming coefficients and associated stress calculation methods are presented for extreme values and fatigue damage. These may also be used for slamming during jacket launching. A film of wave slam was also produced.

Miller, B. L.

1980-03-01

164

Activity Based Physics Alternative Homework Assignments  

NSDL National Science Digital Library

This resource is a collection of introductory physics homework assignments developed as an alternative to traditional textbook exercises. These assignments were designed for use with the Activity-Based Physics instructional method (ABP). Students use observational skills and mathematical modeling, combined with basic physics, to solve problems related to a single situation, such as riding a bicycle or tailgating while driving. Each assignment integrates a variety of concepts and requires students to establish cause and effect relationships. Assignments are available in the following subject categories: mechanics, electricity and magnetism, and waves.

Vick, K.; Redish, Edward F.; Cooney, Patrick

2008-11-21

165

Experimental stress analysis in massive offshore structures  

Microsoft Academic Search

Immense steel and concrete platforms are being used for offshore oil production. Loads in these fixed-rigs, in floating-rig components and in production pipelines are being measured with strain gages and transducers.Certain of these offshore structures and typical testing which has been performed are discussed, including some using environmentally protected weldable strain gages.

Douglas G. Ritchie

1977-01-01

166

Electrical interconnection for offshore wind energy systems  

Microsoft Academic Search

The interconnection and transmission arrangements proposed during the Phase I Department of Energy study of offshore wind power are summarized and this is extended to examine how a 2 GW array located 20-30 km offshore would be connected and operated. The extent to which provision for security against cable damage can be justified is considered together with the philosophy which

G. E. Gardner; P. J. Franklin

1985-01-01

167

Fibre-reinforced caissons for offshore applications  

Microsoft Academic Search

Steel caissons currently used on offshore platforms for the uplift of seawater onto platform topsides, for example, are susceptible to corrosion, and some operators have had to replace corroded caissons during service. The use of fibre reinforced plastics (FRP), in particular glass-fibre (GRP), has been explored by a number of offshore operators as an alternative to steel, principally due to

P. J. Boothby; C. D. Johnstone

1997-01-01

168

Offshore wind energy in the world context  

Microsoft Academic Search

The interest for the exploitation of the offshore wind energy is growing in Europe, where man land use is very high resulting in strong limitation to the installation of onshore wind farms. The today offshore operating wind power is 12 MW, with two wind farms in Denmark and one in Netherlands; it starts to be significant (0.6%) in terms of

Gaetano Gaudiosi

1996-01-01

169

Arctic Offshore Oil and Gas Technology.  

National Technical Information Service (NTIS)

This technical background briefing report is intended to assist in planning engineering research oriented toward Arctic offshore oil and gas recovery. The current five-year leasing schedule for the ice-prone waters of the Arctic offshore has been illustra...

W. M. Sackinger

1982-01-01

170

Judging defect severity on offshore pipelines  

Microsoft Academic Search

In spite of the great care taken in manufacturing, installing, and protecting offshore pipelines, defects often occur and a few have caused pipeline failures. Criteria and methods for assessing the severity of pipeline defects are well known, but their application to offshore lines calls for extra considerations. Defects can arise during pipe fabrication or pipelaying; they can also result from

J. F. Kiefner; W. A. Maxey

1982-01-01

171

Exploration potential of offshore northern California basins  

Microsoft Academic Search

A series of exploratory wells was drilled in the northern California offshore basins in the 1960s following leasing of federal tracts off northern California, Oregon, and Washington. The drilling, although encountering numerous oil shows, was considered at the time to indicate low prospectivity in an area that extended as far south as the offshore Santa Maria basin. However, subsequent major

S. B. Bachman; J. K. Crouch

1988-01-01

172

Arctic offshore drilling: a new challenge  

Microsoft Academic Search

The arctic offshore environment provides the drilling industry with its greatest challenge yet. Problems due to sea ice, high wind, extreme cold and poor bottom soil have required the design of special structures appropriate only for arctic offshore drilling. The challenge lies not just in the obvious factors of temperature and ice, but also the basic physics of ice problems

Wetmore

1985-01-01

173

Chinese Offshore Oil Production: Hopes and Reality  

Microsoft Academic Search

China started to develop its offshore oil resources in earnest in the early 1980s, when world oil price was high and projections about the potential of its offshore oil were extremely rosy. But as exploration and development efforts unfolded in the 1980s, disillusionment set in very quickly, given the mediocre amount of oil discoveries made. This article traces the development

Larry C. H. Chow; Wing-yin Lo

174

Offshore oil and gas technology assessment  

Microsoft Academic Search

In recent years offshore drilling and production technology has evolved in response to the challenges of deep waters and Arctic conditions. In this paper we discuss the development of offshore drilling rigs, platforms, subsea completion systems, pipelines, and tanker loading facilities. We conclude that current technologies modified to meet site-specific requirements are capable of drilling and producing oil and gas

L. Otteman; R. Crooke; R. Shoemaker

1985-01-01

175

An end-user's perspective on activity-based office concepts  

Microsoft Academic Search

Purpose – The activity-based office concept of the modern office is set to increase productivity through the stimulation of interaction and communication while retaining employee satisfaction and reducing the accommodation costs. Although some research has gone into understanding the added value, there is still a need for sound data on the relationship between office design, its intentions and the actual

Rianne Appel-Meulenbroek; Peter Groenen; Ingrid Janssen

2011-01-01

176

Underbalanced drilling benefits now available offshore  

SciTech Connect

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.

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

1997-05-01

177

Offshore sediment overpressures of passive margins: Mechanisms, measurement, and models  

NASA Astrophysics Data System (ADS)

Fluid pressure in excess of hydrostatic equilibrium, or overpressure, in offshore environments is a widespread phenomenon that contributes to the migration and storage of fluids, solutes, and energy and to the potential mechanical instability of these sediments. Overpressure exists in deep and shallow systems and is most likely to be found where low-permeability (<10-16 m2) layers have inhibited pore fluid escape or there have been large forcing mechanisms (e.g., rapid sedimentation, tectonic stressing, heating, and volume-creating reactions). The genesis and magnitude of overpressure can be controlled by physical processes (e.g., rapid sedimentation (>mm/yr), tectonic loading, and lateral fluid transfer) and thermal and chemical processes (e.g., aquathermal expansion, hydrocarbon generation, mineral diagenesis, and organic maturation). In systems where near-lithostatic overpressures are generated, potentially unstable sediments are created. Failures of these sediments can create large-scale natural disasters, generate fractures, and damage seafloor and subseafloor infrastructure. Detailed characterization of overpressured systems has been accomplished through geological and geotechnical analyses, including investigation of physical-mechanical properties (mainly porosity, consolidation state, and shear strength), inversion of geophysical data (e.g., compressional and/or shear velocities), measurement of in situ properties, and postevent analyses. Process-based models have been developed to explain the origin of overpressure in terms of rate of overpressure genesis. This allows identification of potentially unstable zones and assessment of the potential for failure. Future development in measurements and in coupling of models will lead to more accurate analysis and prediction of fluid pressure in offshore sediments, which in turn will facilitate better hazard analyses and will enable safer and more cost-effective offshore drilling practices and other offshore infrastructure development.

Dugan, B.; Sheahan, T. C.

2012-09-01

178

A practical approach to fire hazard analysis for offshore structures.  

PubMed

Offshore quantitative risk assessments (QRA) have historically been complex and costly. For large offshore design projects, the level of detail required for a QRA is often not available until well into the detailed design phase of the project. In these cases, the QRA may be unable to provide timely hazard understanding. As a result, the risk reduction measures identified often come too late to allow for cost effective changes to be implemented. This forces project management to make a number of difficult or costly decisions. This paper demonstrates how a scenario-based approached to fire risk assessment can be effectively applied early in a project's development. The scenario or design basis fire approach calculates the consequence of a select number of credible fire scenarios, determines the potential impact on the platform process equipment, structural members, egress routes, safety systems, and determines the effectiveness of potential options for mitigation. The early provision of hazard data allows the project team to select an optimum design that is safe and will meet corporate or regulatory risk criteria later in the project cycle. The focus of this paper is on the application of the scenario-based approach to gas jet fires. This paper draws on recent experience in the Gulf of Mexico (GOM) and other areas to outline an approach to fire hazard analysis and fire hazard management for deep-water structures. The methods presented will include discussions from the recent June 2002 International Workshop for Fire Loading and Response. PMID:14602403

Krueger, Joel; Smith, Duncan

2003-11-14

179

mapping the offshore wind potential : combination of satellite data and statistics propagation method  

Microsoft Academic Search

Offshore wind farms are generally located in the 5 to 10 Km zone from coast at 10 to 20 meters depth. In order to provide energy at attractive costs, it is necessary to locate the windiest places, and then to locally evaluate the wind resource. Nowadays, this resource is evaluated through direct measurements of wind phenomena by means of onshore

N. Fichaux; T. Ranchin

2003-01-01

180

The potential for grid power integration of offshore ocean wave energy in the UK  

Microsoft Academic Search

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

T. Ahmed; K. Nishida; M. Nakaoka

2010-01-01

181

Identification and reduction of risks in remote operations of offshore Oil and Gas installations  

Microsoft Academic Search

Remote operations of offshore Oil and Gas installation are increasing in the North Sea. The motivation for remote operation is increased income, cost reductions and more effective support. Remote op- erations are influencing the process risk and the Human Factors issues in the change process and operations. The Longford Accident, identified issues that must be under control in remote operations.

S. O. Johnsen; M. A. Lundteigen; H. Fartum STATOIL; Norsk Hydro

182

An “Olympic” framework for a green decommissioning of an offshore oil platform  

Microsoft Academic Search

Oil and gas offshore platform and installations have a limited life of operations. When oil runs out, many terms are used to describe the situation: abandonment, removal, disposal, decommissioning, etc. Even the issue of decommissioning is now at the forefront of deep water oil drilling for many reason (the enormous costs required for disposal, the increasing number of rigs which

Salem Y. Lakhal; M. I. Khan; M. Rafiqul Islam

2009-01-01

183

Case history of drillstem failures offshore West Africa  

SciTech Connect

This paper reports that a high incidence of drillstem (or drillstring) failures was experienced by Conoco Inc. during drilling of exploration wells offshore West Africa. A data base of failure information was used to identify quickly where the majority of the problems occurred. Almost all failures were related to fatigue and corrosion. A study resulted in several recommendations that included improved practices in drill stem selection, quality assurance, and corrosion control. After the recommendations were implemented, a significant reduction in failures was recorded. This increased operating efficiency, reduced drilling costs, and improved safety.

Sweet, R.G. (Conoco U.K. Ltd. (GB))

1992-03-01

184

Description and operating report on the world's first totally offshore NGL (natural gas liquids) facility in operation  

Microsoft Academic Search

A description and operating report on the world's first totally offshore NGL (natural gas liquids) facility in operation, the Ardjuna plant operated by Atlantic Richfield Indonesia Inc. for Pertamina P.N., covers the $173.1 million investment cost; estimated $13 million 1979 operating cost; the four compressor stations which compress associated gas to 650 to 750 psig at a present feed rate

Scheer

1980-01-01

185

Avoidable waste management costs  

SciTech Connect

This report describes the activity based costing method used to acquire variable (volume dependent or avoidable) waste management cost data for routine operations at Department of Energy (DOE) facilities. Waste volumes from environmental restoration, facility stabilization activities, and legacy waste were specifically excluded from this effort. A core team consisting of Idaho National Engineering Laboratory, Los Alamos National Laboratory, Rocky Flats Environmental Technology Site, and Oak Ridge Reservation developed and piloted the methodology, which can be used to determine avoidable waste management costs. The method developed to gather information was based on activity based costing, which is a common industrial engineering technique. Sites submitted separate flow diagrams that showed the progression of work from activity to activity for each waste type or treatability group. Each activity on a flow diagram was described in a narrative, which detailed the scope of the activity. Labor and material costs based on a unit quantity of waste being processed were then summed to generate a total cost for that flow diagram. Cross-complex values were calculated by determining a weighted average for each waste type or treatability group based on the volume generated. This study will provide DOE and contractors with a better understanding of waste management processes and their associated costs. Other potential benefits include providing cost data for sites to perform consistent cost/benefit analysis of waste minimization and pollution prevention (WMIN/PP) options identified during pollution prevention opportunity assessments and providing a means for prioritizing and allocating limited resources for WMIN/PP.

Hsu, K.; Burns, M.; Priebe, S.; Robinson, P.

1995-01-01

186

Critical Success Factors for Offshore Software Development Outsourcing Vendors: An Empirical Study  

Microsoft Academic Search

\\u000a CONTEXT – Offshore software development outsourcing is a contractual business of high quality software production with significant\\u000a cost-saving.\\u000a \\u000a \\u000a OBJECTIVE – The objective of this research paper is to analyse the factors that influence software outsourcing clients in\\u000a the selection of offshore software outsourcing vendors.\\u000a \\u000a \\u000a \\u000a METHOD – We have performed questionnaire surveys with 53 experts. We asked the participants to rank

Siffat Ullah Khan; Mahmood Niazi; Rashid Ahmad

2010-01-01

187

Requirements for different components in cables for offshore application  

Microsoft Academic Search

The installation of offshore wind-farms and the increase in electricity trading between countries has resulted in an increased number of offshore submarine cable installations as an efficient way to solve many electricity supply issues. Although offshore cables with XLPE insulation are similar to land based cables, the offshore environment adds to the challenges of very long lengths, much more onerous

D. Wald; H. Orton; R. Svoma

2009-01-01

188

Risk analysis for offshore structures and equipment  

SciTech Connect

This work describes in detail the results of research on behalf of the EEC commission by an interdisciplinary team on a new technological and methodological approach to risk assessment for the stringent safety standards required in the offshore oil and gas industries. The text describes the methods adopted by other high-risk industries, such as nuclear and aerospace, and develops an adaption of the techniques for offshore structures and equipment. The system is applied to drilling facilities, production and processing, offshore loading, inspection, maintenance and repair.

Not Available

1987-01-01

189

Judging defect severity on offshore pipelines  

SciTech Connect

In spite of the great care taken in manufacturing, installing, and protecting offshore pipelines, defects often occur and a few have caused pipeline failures. Criteria and methods for assessing the severity of pipeline defects are well known, but their application to offshore lines calls for extra considerations. Defects can arise during pipe fabrication or pipelaying; they can also result from mechanical damage, internal and external corrosion, and mud slides. An offshore operator will rarely need to apply a criterion for determining whether to repair or remove a defect; however, when such a criterion would be useful, it should be modified to take advantage of the external pressure provided by the seawater.

Kiefner, J.F.; Maxey, W.A.

1982-05-24

190

Current and future offshore activities in Canada  

SciTech Connect

The development of innovative exploratory drilling systems for Canada's harsh Arctic offshore areas over the past decade and future activity in these areas, including possible production concepts, are discussed. The results can be applied in other Arctic areas of the world, including offshore Alaska. This operating experience will advance technology and serve as a basis for the design of Arctic offshore production and transportation systems. Unique technology has been developed and successfully used in the discovery of major accumulations of hyrodcarbons. Continued technological advances are anticipated to have widespread Arctic applications in both exploratory and production operations.

Hnatiuk, J.

1987-06-01

191

NAIS: nuclear activation-based imaging spectroscopy.  

PubMed

In recent years, the development of high power laser systems led to focussed intensities of more than 10(22) W/cm(2) at high pulse energies. Furthermore, both, the advanced high power lasers and the development of sophisticated laser particle acceleration mechanisms facilitate the generation of high energetic particle beams at high fluxes. The challenge of imaging detector systems is to acquire the properties of the high flux beam spatially and spectrally resolved. The limitations of most detector systems are saturation effects. These conventional detectors are based on scintillators, semiconductors, or radiation sensitive films. We present a nuclear activation-based imaging spectroscopy method, which is called NAIS, for the characterization of laser accelerated proton beams. The offline detector system is a combination of stacked metal foils and imaging plates (IP). After the irradiation of the stacked foils they become activated by nuclear reactions, emitting gamma decay radiation. In the next step, an autoradiography of the activated foils using IPs and an analysis routine lead to a spectrally and spatially resolved beam profile. In addition, we present an absolute calibration method for IPs. PMID:23902056

Günther, M M; Britz, A; Clarke, R J; Harres, K; Hoffmeister, G; Nürnberg, F; Otten, A; Pelka, A; Roth, M; Vogt, K

2013-07-01

192

NAIS: Nuclear activation-based imaging spectroscopy  

SciTech Connect

In recent years, the development of high power laser systems led to focussed intensities of more than 10{sup 22} W/cm{sup 2} at high pulse energies. Furthermore, both, the advanced high power lasers and the development of sophisticated laser particle acceleration mechanisms facilitate the generation of high energetic particle beams at high fluxes. The challenge of imaging detector systems is to acquire the properties of the high flux beam spatially and spectrally resolved. The limitations of most detector systems are saturation effects. These conventional detectors are based on scintillators, semiconductors, or radiation sensitive films. We present a nuclear activation-based imaging spectroscopy method, which is called NAIS, for the characterization of laser accelerated proton beams. The offline detector system is a combination of stacked metal foils and imaging plates (IP). After the irradiation of the stacked foils they become activated by nuclear reactions, emitting gamma decay radiation. In the next step, an autoradiography of the activated foils using IPs and an analysis routine lead to a spectrally and spatially resolved beam profile. In addition, we present an absolute calibration method for IPs.

Günther, M. M.; Britz, A.; Harres, K.; Hoffmeister, G.; Nürnberg, F.; Otten, A.; Pelka, A.; Roth, M. [Institut für Kernphysik, Schlossgartenstr. 9, Technische Universität Darmstadt, D-64289 Darmstadt (Germany)] [Institut für Kernphysik, Schlossgartenstr. 9, Technische Universität Darmstadt, D-64289 Darmstadt (Germany); Clarke, R. J. [Central Laser Facility, Rutherford Appelton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)] [Central Laser Facility, Rutherford Appelton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom); Vogt, K. [GSI – Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)] [GSI – Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)

2013-07-15

193

Neuropeptide Y facilitates activity-based-anorexia.  

PubMed

The hypothesis that treatment with neuropeptide Y (NPY) can increase running activity and decrease food intake and body weight was tested. Female rats with a running wheel lost more weight than sedentary rats and ran progressively more as the availability of food was gradually reduced. When food was available for only 1h/day, the rats lost control over body weight. Correlatively, the level of NPY mRNA was increased in the hypothalamic arcuate nucleus. This phenomenon, activity-based-anorexia, was enhanced by intracerebroventricular infusion of NPY in rats which had food available during 2h/day. By contrast, NPY stimulated food intake but not wheel running in rats which had food available continuously. These findings are inconsistent with the prevailing theory of the role of the hypothalamus in the regulation of body weight according to which food intake is a homeostatic process controlled by "orexigenic" and "anorexigenic" neural networks. However, the finding that treatment with NPY, generally considered an "orexigen", can increase physical activity and decrease food intake and cause a loss of body weight is in line with the clinical observation that patients with anorexia nervosa are physically hyperactive and eat only little food despite having depleted body fat and up-regulated hypothalamic "orexigenic" peptides. PMID:17467917

Nergårdh, R; Ammar, A; Brodin, U; Bergström, J; Scheurink, A; Södersten, P

2007-06-01

194

Proceedings of offshore and arctic operations, 1992  

SciTech Connect

This book contains the proceeding of the offshore and Arctic operations. Topics included are: Pile driving; Flexible pipes; QA/QC Requirements; Oil and gas exploitations and Off shore well-log analysis.

Tawfik, A.S. (Brown and Root Inc. (US)); Attia, F.G. (University of Houston (US))

1992-01-01

195

Civil engineering in the Arctic offshore  

SciTech Connect

This book presents the current state of practice and theory in the civil engineering aspects of offshore development in the Arctic. It also covers the emerging concepts and requirements, research and development needs, and a critique of present undergraduate programmes.

Bennett, F.L.; Machemehl, J.L.

1985-01-01

196

Evaluation of Sand Resources, Atlantic Offshore, Delaware.  

National Technical Information Service (NTIS)

Lithologic logs from 268 vibracores taken from the Delaware Atlantic offshore were evaluated for sediment type and compatibility with historical beach sediment textures. A model of sand resource evaluation, known as stack-unit mapping (Kempton, 1981) was ...

K. K. McKenna K. W. Ramsey

2002-01-01

197

Expanders do payouts offshore North Sea  

SciTech Connect

Rich associated gas may be beneficially processed offshore, to yield high value condensate to be spiked into the crude, whilst still producing gas with an acceptable nett calorific value. Actual turbo expander operating experience on the Occidental Piper North Sea Platform has demonstrated that expanders are reliable offshore. This paper, describes both the process and mechanical aspects that affect the choice of an expander system for an offshore application. For a given typical rich associated gas, three process options are compared, Joule-Thompson expansion, external refrigeration and a turbo expander system. The process study illustrates that a turbo expander system is comparable for the offshore situation with the other two options. The paper also describes the mechanical features that should be incorporated into the specification of an expander for use on a platform topsides.

Barnwell, J.; Wong, W.

1984-02-01

198

Arctic offshore drilling: a new challenge  

SciTech Connect

The arctic offshore environment provides the drilling industry with its greatest challenge yet. Problems due to sea ice, high wind, extreme cold and poor bottom soil have required the design of special structures appropriate only for arctic offshore drilling. The challenge lies not just in the obvious factors of temperature and ice, but also the basic physics of ice problems are not well understood. The arctic environment and the petroleum industry are discussed.

Wetmore, S.B.

1985-11-01

199

Grid Integration of Offshore Wind Farms  

Microsoft Academic Search

\\u000a Offshore wind farms tend to become bigger and far from the onshore point of connection. The developers and the system operators\\u000a are facing a number of technical, economical, and environmental challenges in transmitting the bulk power developed at these\\u000a offshore wind farms over long distances. In this Chapter, some of these issues are discussed, giving emphasis to the basic\\u000a system

Lie Xu

200

Decommissioning of Offshore Oil and Gas Installations  

Microsoft Academic Search

The offshore oil and gas industry had its beginnings in the Gulf of Mexico in 1947. The first offshore development used a\\u000a multipiled steel jacket to support the topside production facilities, a design which has since been used extensively. Now\\u000a there are more than 7000 drilling and production platforms located on the Continental Shelves of 53 countries [1]. Some of

M. D. Day

201

Corrosion control survey methods for offshore pipelines  

SciTech Connect

Construction, operation, and maintenance of offshore pipelines and other facilities are expensive. The consequences of an offshore corrosion failure can be devastating. For these reasons, cathodic protection (CP) has become a universally applied technique for mitigating corrosion. Marine pipelines are typically provided with CP by bracelet anodes of zinc or aluminum. Impressed current systems at platforms or onshore are also used as well as hybrid systems that use a combination of the two. In this paper survey techniques are described and evaluated.

Weldon, C.P.; Kroon, D. (Corrpro Co. Inc., North, Spring, TX (US))

1992-02-01

202

Variability within upper offshore facies  

SciTech Connect

Large, undisturbed cores were collected adjacent to five of the barrier islands within the southeastern Atlantic Bight. Sampling was restricted to the narrow band of contemporary sedimentation within 16 km of the beach. X-radiography analyses of sediment texture, sedimentary structures, and bioturbation reveal significant variability within the upper offshore facies of a low-energy mesotidal nearshore environment. Samples collected off southern Hilton Head and off southern Wassaw consist of bioturbated muddy fine-grained sand. The relative predominance of silt- and clay-size detritus within the cores taken north of the Savannah River inlet reflect the high quantities of suspended organic and particular sediment flushing out the inlet mouth. Cores taken south of the Savannah River inlet off southern Tybee consist of clean, medium to coarse-grained sand which is replaced by bioturbate silty fine-grained sand farther south along a transect normal to Williamson Island. Tybee Island has undergone continuous erosion during the 20th century. Samples taken from the nearshore in this area may reflect a deficit in the sediment budget or may reflect that increased tidal currents around Tybee Inlet prevent the deposition of fines. Interpretation of these cores is complicated by suspected contamination. Less than 2 km from our sampling stations is a dumping site for material dredged from the Savannah River navigational channel. Two transects each were collected in the nearshore normal to Ossabaw and St. Catherines Islands. X-radiographs of these cores depict an interplay between bioturbate texture and physical sedimentary structures.

Paulsen, M.

1986-05-01

203

Reducing Offshore Transmission Requirements by Combining Offshore Wind and Wave Farms  

Microsoft Academic Search

The advantages of combining offshore wind and wave energy into a single farm include reduced hours of zero power output and reduced interhour variability. Both advantages facil- itate grid integration of variable renewables. The power output profile of a combined farm with wind and wave is substantially dif- ferent from a 100% offshore wind energy farm or a 100% wave

Eric D. Stoutenburg; Mark Z. Jacobson

2011-01-01

204

Using airborne and satellite SAR for wake mapping offshore  

NASA Astrophysics Data System (ADS)

Offshore wind energy is progressing rapidly around Europe. One of the latest initiatives is the installation of multiple wind farms in clusters to share cables and maintenance costs and to fully exploit premium wind resource sites. For siting of multiple nearby wind farms, the wind turbine wake effect must be considered. Synthetic aperture radar (SAR) is an imaging remote sensing technique which offers a unique opportunity to describe spatial variations of wind speed offshore. For the first time an airborne SAR instrument was used for data acquisition over a large offshore wind farm. The aim was to identify the turbine wake effect from SAR-derived wind speed maps as a downstream region of reduced wind speed. The aircraft SAR campaign was conducted on 12 October 2003 over the wind farm at Horns Rev in the North Sea. Nearly simultaneous measurements were acquired over the area by the SAR on board the ERS-2 satellite. In addition, meteorological data were collected. Both aircraft and satellite SAR-derived wind speed maps showed significant velocity deficits downstream of the wind farm. Wind speed maps retrieved from aircraft SAR suggested deficits of up to 20% downstream of the last turbine, whereas satellite SAR-derived maps showed deficits of the order of 10%. The difference originated partly from the two different reference methods used for normalization of measured wind speeds. The detected region of reduced wind speed had the same width as the wind turbine array, indicating a low degree of horizontal wake dispersion. The downstream wake extent was approximately 10 km, which corresponds well with results from previous studies and with wake model predictions. Copyright

Christiansen, Merete B.; Hasager, Charlotte B.

2006-09-01

205

10 CFR 150.7 - Persons in offshore waters not exempt.  

Code of Federal Regulations, 2012 CFR

...2014-01-01 false Persons in offshore waters not exempt. 150.7 Section 150...IN AGREEMENT STATES AND IN OFFSHORE WATERS UNDER SECTION 274 Continued Commission Regulatory Authority in Offshore Waters § 150.7 Persons in offshore...

2014-01-01

206

Offshore oil gas trends in ROVs tooling  

SciTech Connect

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.

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

1994-04-01

207

On the Modelling of a Floating Offshore Wind Turbine  

NASA Astrophysics Data System (ADS)

The location of wind turbines on floating structures offshore would allow an immense resource to be tapped without the drawbacks large developments can have on public opinion. There are, however, potentially significant technical and cost drawbacks. This article describes the theory and results of research work aimed at developing analytical tools for evaluating the performance of floating offshore wind farms. The principal problem addressed here is the development of analytical tools for modelling the turbine loads and fatigue damage due to the vessel motion. The effect that the motion would have on the wind turbine is found by calculating the aerodynamic and inertial loads on the blades in a two-dimensional state domain representing the blade and the vessel motion respectively. Using a double Fourier transform, discrete deterministic frequency spectra of the loads are found and the fatigue damage is evaluated. Undertaking the calculations for vessel motion in each degree of freedom allows appropriate weightings to be developed, which can be used for the optimization of candidate supporting vessels by evaluating the motion response directly.

Henderson, Andrew R.; Patel, Minoo H.

2003-01-01

208

Fire-resistant pump protects offshore platform  

SciTech Connect

This paper reports on strict safety regulations for North Sea platforms which required the development of a disaster-resistant enclosure for a diesel-driven fire pump. Offshore oil and gas platforms have an excellent safety record for facilities that handle large volumes of volatile hydrocarbons. One major reason for this record is the attention paid to safety at these facilities where a small fire can quickly turn into a major disaster. In a recent project, Noise Control Technology Corp., Dallas, Texas, designed, manufactured and supplied an A60-rated fire pump enclosure for a North Sea platform. The A60 rating of enclosures or rooms is primarily an offshore standard of the International Maritime Organization and intended as a safety mandate for ships, offshore rigs, platforms and other marine installations.

Not Available

1992-10-01

209

Current and future offshore activities in Canada  

SciTech Connect

The development of innovative exploratory drilling systems for Canada's harsh Arctic offshore areas over the past decade is described. Future activity in these areas, including possible production concepts, is also discussed. The results of the experience in Canadian waters can be applied in other Arctic areas of the world including offshore Alaska. This operating experience will serve to further advance the drilling technology and will serve as a basis for the design of Arctic offshore production and transportation systems. Artificial islands, first commenced in 1972, are still being constructed but with improved designs and equipment. A step forward has been the use of subsea berms on which concrete or steel segmented caissons have been placed. Integrated-type steel caissons have also been adapted for placement on subsea berms, one of which is half of a crude oil tanker and a second, a purpose-built steel caisson to be placed this summer.

Hnatiuk, J.

1984-05-01

210

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

SciTech Connect

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.

Not Available

2012-02-01

211

46 CFR 131.320 - Safety orientation for offshore workers.  

Code of Federal Regulations, 2013 CFR

... false Safety orientation for offshore workers. 131.320 Section 131.320 Shipping COAST GUARD, DEPARTMENT OF HOMELAND...VESSELS OPERATIONS Preparations for Emergencies § 131.320 Safety orientation for offshore...

2013-10-01

212

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

NASA Astrophysics Data System (ADS)

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).

O'Reilly, Christopher M.

213

Flexible liner safeguards environment during offshore workover  

SciTech Connect

A Total-containment liner was installed on the upper deck of a Louisiana offshore platform in West Cameron 593A, by Unocal Exploration Corp. The liner will help protect the environment during workover operations. Unocal's major environmental concern was the oilbased packer fluid used in the wells. Even though the platform workover rig, Hercules; Rig 11, was equipped with containment equipment which met federal regulations, Unocal wanted a secondary containment device to further guarantee that an accidental spill would not occur, according to Clyde Landry, Unocal's district production manager for the west offshore district, Louisiana region.

Not Available

1991-06-10

214

Regional method to assess offshore slope stability.  

USGS Publications Warehouse

The slope stability of some offshore environments can be evaluated by using only conventional acoustic profiling and short-core sampling, followed by laboratory consolidation and strength testing. The test results are synthesized by using normalized-parameter techniques. The normalized data are then used to calculate the critical earthquake acceleration factors or the wave heights needed to initiate failure. These process-related parameters provide a quantitative measure of the relative stability for locations from which short cores were obtained. The method is most applicable to offshore environments of gentle relief and simple subsurface structure and is not considered a substitute for subsequent site-specific analysis. -from ASCE Publications Information

Lee, H. J.; Edwards, B. D.

1986-01-01

215

The Stability of Offshore Outsourcing Relationships  

Microsoft Academic Search

• \\u000a \\u000a \\u000a Offshore outsourcing of administrative and technical services has become a mainstream business practice. Increasing commoditization\\u000a of business services and growing client experience with outsourcing have created a range of competitive service delivery options\\u000a for client firms.\\u000a \\u000a \\u000a \\u000a \\u000a • \\u000a \\u000a \\u000a Yet, data from the Offshoring Research Network (ORN) suggests that, despite increasing market options and growing client expectations\\u000a related to service quality

Stephan Manning; Arie Y. Lewin; Marc Schuerch

2011-01-01

216

Exotic invertebrate species on offshore oil platforms  

Microsoft Academic Search

ABSTRACT: We report the presence,of 3 exotic invertebrate,species,inhabiting,offshore,oil and gas platforms on the Pacific offshore continental shelf (POeS) of central and southern California, USA. These exotic species,occur in high cover or density and may,negatively,affect populations,of native species on the platforms. Conspicuous,exotic species,(the bryozoan,Watersipora ?subtorquata and the anemone,Diadumene,sp.) were detected on 2 of 7 platforms,surveyed. An inconspicuous,exotic spe­ cies (the amphipod,Caprella

Henry M. Page; J Enifer E. Dugan; Carolynn S. Culver; JC Hoesterey

2006-01-01

217

Activity Based Startup Plan for Prototype Vertical Denitration Calciner  

SciTech Connect

Testing activities on the Prototype Vertical Denitration Calciner at PFP were suspended in January 1997 due to the hold on fissile material handling in the facility. The restart of testing activities will require a review through an activity based startup process based upon Integrated Safety Management (ISM) principles to verify readiness. The Activity Based Startup Plan has been developed for this process.

SUTTER, C.S.

1999-08-31

218

Teaching ABC & Cost Behaviors to Non-Numbers People  

ERIC Educational Resources Information Center

Simply put, a cost analysis studies how you spend your money. Activity based costing models associate costs with services and cost benefit analysis weighs whether or not the costs expended were worth the money given the efforts involved and the results achieved. This study seeks to understand the financial choices and information seeking behaviors…

Taylor, Virginia Anne; Rudnick, Martin

2007-01-01

219

Risk-based maintenance model for offshore oil and gas pipelines: a case study  

Microsoft Academic Search

Offshore oil and gas pipelines are vulnerable to environment as any leak and burst in pipelines cause oil\\/gas spill resulting in huge negative impacts on marine lives. Breakdown maintenance of these pipelines is also cost-intensive and time-consuming resulting in huge tangible and intangible loss to the pipeline operators. Pipelines health monitoring and integrity analysis have been researched a lot for

Prasanta Kumar Dey; Stephen O. Ogunlana; Sittichai Naksuksakul

2004-01-01

220

Design considerations for medium-frequency power transformers in offshore wind farms  

Microsoft Academic Search

In a recently proposed converter system for offshore wind farms, single-phase medium-frequency (MF) transformers replace the conventional three-phase line-frequency transformers that convert the electricity from the wind turbine generators to high voltage. MF operation allows a reduction of the transformer size and weight, thus leading to a compact and efficient design, which minimizes the installation and maintenance costs. This paper

Stephan Meier; Tommy Kjellqvist; Staffan Norrga; Hans-Peter Nee

2009-01-01

221

Welding Technology for Metallic Sheathing of Offshore Steel Structures Using Seawater-resistant Stainless Steel Sheet  

Microsoft Academic Search

Welding technology for metallic sheathing of offshore steel structures in seawater tidal and splash zones was described. Seawater-resistance stainless steel SUS 312L sheets of 0.4-0.6mm in thickness were lap-welded on carbon steel pipes with the indirect seam welding process. Compared to conventional metallic sheathing meth- ods, this method enabled to reduce material and fabrication costs. A combined weld- ing method

Yasuhiro KAWAI; Hiroshi IWAMI; Hirotaka SATOH; Norimitsu BABA

2007-01-01

222

Geochemical Characterization of Offshore Western Niger Delta Source Rock  

Microsoft Academic Search

A geochemical characterization of rock samples obtained from three offshore fields, MJ, MF, and ML, was carried out. Offshore oil and onshore oil samples were also studied for correlation. The gas chromatographic data showed that the three offshore fields studied exhibited different and unique geochemical signatures. Most rock samples from the MJ field have moderate thermal maturity; n-alkane and their

A. Akinlua; N. Torto

2010-01-01

223

Human and organization factors: engineering operating safety into offshore structures  

Microsoft Academic Search

History indicates clearly that the safety of offshore structures is determined primarily by the humans and organizations responsible for these structures during their design, construction, operation, maintenance, and decommissioning. If the safety of offshore structures is to be preserved and improved, then attention of engineers should focus on to how to improve the reliability of the offshore structure ‘system,’ including

Robert G. Bea

1998-01-01

224

Detection of wind wakes offshore from satellite SAR  

Microsoft Academic Search

A study is presented on the mapping of ocean wind fields for detection of wind wakes downstream of an offshore wind farm. The study is based on ERS-2 Synthetic Aperture Radar (SAR) scenes obtained in 2003 over Horns Reef in the North Sea. A large offshore wind farm (80 wind turbines) is located 14-20 km offshore of Denmark on this

M. B. Christiansen; C. B. Hasager

2004-01-01

225

Challenges on the Road to an Offshore HVDC Grid  

Microsoft Academic Search

This paper discusses the technical challenges for offshore HVDC grids, which is a promising alternative for grid connection of offshore windfarms. The first topic is why HVDC is necessary, and which types of converters there should be used, resulting in a clear recommendation of HVDC based on voltage source converters. There is already offshore experience with VSC HVDC and the

Erik Koldby; Mats Hyttinen

226

Visual impact assessment of offshore wind farms and prior experience  

Microsoft Academic Search

Energy planners have shifted their attention towards offshore wind power generation and the decision is supported by the public in general, which in the literature has a positive attitude towards offshore wind generation. However, globally only a few offshore wind farms are operating. As more wind farms start operating and more people become experienced with especially the visual impacts from

Jacob Ladenburg

2009-01-01

227

Are offshore power plants realistic. [Alternative to nuclear power plants  

Microsoft Academic Search

Offshore fossil-fueled electric power plants offer a positive alternative to nuclear proliferation, a viable technology for providing electricity to coastal cities. Such plants combine new technology from the offshore oil industry with efficient power generation techniques, are cheaper than nuclear plants, and could burn coal or solid waste or a mixture of both. Offshore power plants could utilize ocean water

Adler

1976-01-01

228

A case study of national culture and offshoring services  

Microsoft Academic Search

Purpose – Prior surveys have shown that national culture is a leading cause of problems in offshoring services. The research question posed in this paper centers on how and through what specific decisions national culture affects operational implementation in offshore facilities. Design\\/methodology\\/approach – A particular US service process offshored to Barbados and the Dominican Republic is studied. Ethnographic worker observations

Richard Metters

2008-01-01

229

International Offshore Students' Perceptions of Virtual Office Hours  

ERIC Educational Resources Information Center

Purpose: The main aim of this study is to gauge international offshore students' perceptions of virtual office hours (VOH) to consult with their offshore unit coordinators in Australia. Design/methodology/approach: This paper employs a quantitative and qualitative approach where data was sourced from three offshore campuses over a 12-month period…

Wdowik, Steven; Michael, Kathy

2013-01-01

230

Russia's Rosshelf sets timetable for arctic offshore field development  

SciTech Connect

Russia's ambitious new petroleum firm Rosshelf has disclosed a proposed timetable for developing two offshore arctic fields. The upstart domestic joint stock company, formed only last year, also has indicated that its interest in tapping resources on Russia's northern shelves extends far beyond the pair of arctic fields currently earmarked for development: the Barents Sea's super-giant Shtokmanovskoye gas/condensate reservoir and the Pechora Sea's much smaller Prirazlomnoye oil field for which it has been granted development rights. Rosshelf officials said Shtokmanovskoye should be on production by 2000 if development begins by the end of 1993. Meanwhile, Rosshelf has set a target date of 1997 to start production from Prirazlomnoye oil field in the Pechora Sea, a southeast arm of the Barents Sea. The paper describes future targets, Rosshelf victory over its competitor, cost and financing, and expected yields from the Shtokmanovskoye and Prirazlomnoye fields.

Not Available

1993-02-22

231

United States Offshore Wind Resource Assessment  

NASA Astrophysics Data System (ADS)

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

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

2008-12-01

232

Offshore-platform decommissioning perceptions change  

Microsoft Academic Search

The oil and gas industry has seen a change in the perceptions about decommissioning offshore facilities. Now, decommissioning projects are being planned ahead of actual field development, and new concepts derived during decommissioning often are used to provide feedback for new development projects. The current trends and concepts applicable to decommissioning can be summarized as: advanced planning; engineered solutions; research

Twachtman

1997-01-01

233

Response actions at offshore hazardous waste sites  

Microsoft Academic Search

Scores of U.S. offshore continental hazardous wastes sites, including radioactive, bulk industrial chemical, unexploded ordnance, and chemical weapons, as well as sunken vessels containing hazardous cargo have gone uninvestigated as to their potential impact on the marine ecosystem. Only one site investigated, the “Santa Clara I”, with advanced technologies resulted in a successful response action not requiring further attention. Other

J. Lindsay; H. Karl; P. McGillivary; P. Vogt; R. Halls; I. MacDonald; B. Coles

1998-01-01

234

Harmonic modelling of offshore wind farms  

Microsoft Academic Search

The combination of extensive cable networks and wind turbine converters has been identified as a potential cause of resonances. A modelling approach for a doubly fed induction generator and a full power converter fed generator for harmonic penetration studies is developed and discussed. An example offshore wind farm is then studied in the simulation package IPSA using the detailed wind

R. King; J. B. Ekanayake

2010-01-01

235

A New Architecture for Offshore Wind Farms  

Microsoft Academic Search

Offshore wind farms using HVDC links can be positioned a large distance from shore, opening up new opportunities for wind generation. Conventional approaches using 60 Hz generators and transformers are not appropriate in such applications, as they are heavy and result in expensive and complex installation and maintenance issues. This paper proposes an alternative architecture for such wind farms, using

Anish Prasai; Jung-Sik Yim; Deepak Divan; Ashish Bendre; Seung-Ki Sul

2008-01-01

236

A new architecture for offshore wind farms  

Microsoft Academic Search

Offshore wind farms using HVDC links can be positioned a large distance from shore, opening up new opportunities for wind generation. Conventional approaches using 60 hertz generators and transformers are not appropriate in such applications, as they are heavy and result in expensive and complex installation and maintenance issues. This paper proposes an alternative architecture for such wind farms, using

Anish Prasai; A. Bendre; Jung-Sik Yim; Seung-Ki Sul; D. Divan; Frank Kreikebaum

2007-01-01

237

Offshore Investments by Colleges Draw Scrutiny  

ERIC Educational Resources Information Center

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…

Fain, Paul; Wolverton, Brad

2007-01-01

238

Spar buoy escape system for offshore platforms  

Microsoft Academic Search

An offshore platform is shown in position over the seabed. An escape chamber in the form of a spar buoy is mounted on a platform and extends from the platform above the surface of the water to below the surface. A cable also extends between the buoy and an anchor located on the seabed remotely from the platform. When the

Connelly

1985-01-01

239

Tephrochronology offshore Ischia Island, Tyrrhenian sea, Italy  

Microsoft Academic Search

This work presents the analytical results of a tephrochronological study carried out on 12 gravity cores collected offshore southern Ischia island down to a maximum depth of 1238 m. The more distal site (core C1071) is located few kilometers to the west of the \\

Donatella Insinga; Roberto Sulpizio; Giovanni de Alteriis; Simona Morabito; Vincenzo Morra; Mario Sprovieri; Claudia di Benedetto; Carmine Lubritto; Giovanni Zanchetta

2010-01-01

240

Offshore Essaouira basin: Geology and hydrocarbon potential  

Microsoft Academic Search

The study area lies in the offshore extension of the onshore Essaouria basin. The Mesozoic development of the Essaouira margin was largely controlled by Late Triassic to Mid-Jurassic rifting and subsequent opening of the Central Atlantic, with the evolution of a typical passive, opening of the Central Atlantic, with the evolution of a typical passive, continental margin. Diapiric salt structure

H. Jabour; A. Ait Salem

1991-01-01

241

Offshore Corrosion Protection of Wind Farms  

Microsoft Academic Search

The increasing development of offshore Wind Farms brings with it a new level of corrosion problems due to the aggressive marine surroundings. However, this problem has been in existence for almost 40 years with the Oil & Gas production industry which has worked hard to produce satisfactory solutions to these problems. A number of expensive failures in the Oil and

James Thick

242

Probability distributions for offshore wind speeds  

Microsoft Academic Search

In planning offshore wind farms, short-term wind speeds play a central role in estimating various engineering parameters, such as power output, extreme wind load, and fatigue load. Lacking wind speed time series of sufficient length, the probability distribution of wind speed serves as the primary substitute for data when estimating design parameters. It is common practice to model short-term wind

Eugene C. Morgan; Matthew Lackner; Richard M. Vogel; Laurie G. Baise

2011-01-01

243

Stochastic Modeling Techniques for Offshore Geohazards  

NASA Astrophysics Data System (ADS)

Much remains to be known about offshore phenomena, despite the potential threat they pose to coastal communities and economically-important offshore infrastructure. The scientific and engineering community has a fairly good grasp of the mechanics governing these geohazards; for instance, we can model tsunami run-ups over entire oceans, evaluate the stability of slopes, and predict the runout of a given landslide. Much of the uncertainty arising in applications of such models stems from the sparsity and error in offshore data. Such datasets are often sparse because the ocean is so large, and contain values with potentially significant measurement error because of the complexities involved in collecting data in such extreme conditions (e.g., sampling sediment under miles of water). Stochastic techniques and statistics quantify these types of uncertainty. In the first chapter of this dissertation, I apply a stochastic optimization method to a geophysical model to achieve estimates of sub-seabed gas concentrations from remotely-sourced seismic reflection data. In the second chapter, I combine geostatistics and first-order, second-moment uncertainty analysis to map the probability of slope failure along the entire U.S. Atlantic margin. My third and final chapter statistically characterizes offshore wind speeds using an unprecedented amount of data collected over the northwestern hemisphere.

Morgan, Eugene C.

244

Primary, Physical Impacts of Offshore Petroleum Developments.  

National Technical Information Service (NTIS)

These studies on the initial physical effects of offshore oil development respond to the need for information on potential petroleum production from the Atlantic and Gulf of Alaskan continental shelves. In the first section of this report, a range of hypo...

1974-01-01

245

Mobile offshore structure for arctic exploratory drilling  

Microsoft Academic Search

An offshore exploratory drilling floatable structure ballastable to rest on a sea floor but to extend above water level when so supported and adapted to withstand arctic ice loads, comprising a substantially vertical wall capable of withstanding arctic ice loads; a structural load bearing bottom rigidly connected to a lower portion of the wall; and a floatable vertically displaceable load

D. R. Hale; J. A. Orndorff Jr; W. A. Owen

1985-01-01

246

Risk analysis for Arctic offshore operations  

SciTech Connect

Offshore exploration for hydrocarbons is being conducted in the near-shore regions of the Beaufort Sea. This activity is expected to be intensified and expanded into the deeper portions of the Beaufort, as well as into the Chukchi Sea. The ice conditions in the Beaufort Sea are very variable, particularly in the deeper water regions. This variability greatly influences the probability of success or failure of an offshore operation. For example, a summer exploratory program conducted from a floating drilling unit may require a period of 60 to 100 days on station. The success of such a program depends on: (a) the time when the winter ice conditions deteriorate sufficiently for the drilling unit to move on station; (b) the number of summer invasions by the arctic ice pack, forcing the drilling unit to abandon station; (c) the rate at which first-year ice grows to the ice thickness limit of the supporting icebreakers; and (d) the extent of arctic pack expansion during the fall and early winter. In general, the ice conditions are so variable that, even with good planning, the change of failure of an offshore operation will not be negligible. Contingency planning for such events is therefore necessary. This paper presents a risk analysis procedure which can greatly benefit the planning of an offshore operation. A floating drilling program and a towing and installation operation for a fixed structure are considered to illustrate the procedure.

Slomski, S.; Vivatrat, V.

1986-04-01

247

New York Offshore Airport Feasibility Study.  

National Technical Information Service (NTIS)

The purpose of the study was to determine the technical and economic feasibility of an offshore airport for the New York metropolitan region. The study included analyses of a series of major tasks and subtasks which affect airport planning including air t...

1972-01-01

248

New York Offshore Airport Feasibility Study.  

National Technical Information Service (NTIS)

The purpose of the study was to determine the technical and economic feasibility of an offshore airport for the New York metropolitan region. The study included analyses of a series of major tasks and substasks which affect airport planning including air ...

L. Lerner M. A. Graham

1973-01-01

249

Sea loads on ships and offshore structures  

Microsoft Academic Search

The book introduces the theory of the structural loading on ships and offshore structures caused by wind, waves and currents, and goes on to describe the applications of this theory in terms of real structures. The main topics described are linear-wave induced motions, loads on floating structures, numerical methods for ascertaining wave induced motions and loads, viscous wave loads and

O. M. Faltinsen

1990-01-01

250

Protecting the Sable Offshore Energy Project  

Microsoft Academic Search

A project to develop one of the largest remaining known natural gas deposits in North America currently is underway in the Atlantic waters of Canada. The Sable Offshore Energy Project (SOEP) is a $3 billion venture to develop six major natural gas fields that lie 10 to 40 km north of the edge of the Scotian Shelf in waters 20

Cederquist

1999-01-01

251

3 MW class offshore wind turbine development  

Microsoft Academic Search

This paper introduces the design and development of a 3MW class offshore wind turbine (WinDS3000). The design has been carried out by considering high reliability, availability, maintainability and serviceability (RAMS) for the wind class TC Ia. An integrated drive train design, which has an innovative three stage gearbox, has been introduced to minimize nacelle weight of the wind turbine and

Jiwoong Park; Jeongil Kim; Youngho Shin; Jeonghoon Lee

2010-01-01

252

Canada's first offshore oil: what now  

Microsoft Academic Search

Canada's eastern offshore is not only a big exploration theater, but geologically it is among the most promising in the world. A major find here, especially in the S. parts nearest markets, will have greater impact on the world petroleum scene than on equal find almost anywhere else. Mobil Oil Canada has completed what promises to be a commercial oil

Heise

1971-01-01

253

Protective shroud for offshore oil wells  

Microsoft Academic Search

This invention provides means and methods for servicing offshore oil wells under routine and emergency conditions. Thus, a protective shroud surrounding the well site and provided with pumping means can be used to recover spilled oil, store oil, extinguish blowouts and fires, and protect rigs, platforms and personnel. A hollow shroud structure, preferably of circular cross section surrounding an oil

A. O. Johnson; D. Personette

1981-01-01

254

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...

255

Activity Based Startup Plan for Prototype Vertical Denitration Calciner  

SciTech Connect

Testing activities on the Prototype Vertical Denitration Calciner at Plutonium Finish Plant (PFP) were suspended in January 1997 due to the hold on fissile material handling in the facility. The restart of testing activities will require a review through an activity based startup process based upon Integrated Safety Management (ISM) principles to verify readiness. The Activity Based Startup Plan for the Prototype vertical Denitration Calciner has been developed for this process.

SUTTER, C.S.

1999-08-16

256

EPA issues offshore air pollution regulations  

SciTech Connect

This paper reports that the Environmental Protection Agency has issued regulations equalizing offshore air pollution rules with onshore standards except in the Gulf of Mexico. The rules hold platforms and drilling rigs within 25 miles of states' seaward boundaries to the same state, local, and federal requirements as if they were located in the corresponding onshore areas. If EPA finds state regulations are adequate, it will delegate to the coastal state the implementation and enforcement authority for the OCS rules. Air emissions sources more than 25 miles offshore will be subject only to federal requirements. EPA said within 2 years the rules will result in significant benefits to certain onshore areas currently violating smog standards.

Not Available

1992-08-31

257

Offshore desulfurization unit permits gas lift operations  

SciTech Connect

This paper reports on the installation of a desulfurization unit for the Tchibouela oil field, offshore Congo, which allowed produced low-pressure associated gas containing CO{sub 2} to be kept for gas lift operations while, for safety reasons, the large volume of H{sub 2}S at low pressure was removed prior to compression. Since October 1989, the world's first offshore amine sweetening unit has worked satisfactorily and continues to prove that it is an attractive production alternative. For desulfurization, a selective methyldiethanolamine (MDEA) process, developed by Elf Aquitaine, was chosen because it was the only process that met the required specifications at a low pressure of 3.5 bar (51 psi).

Cabes, A.; Elgue, J.; Tournier-Lasserve, J. (Societe Nationale Elf Aquitaine Paris (FR))

1992-01-13

258

New technology emphasizes international offshore effort  

SciTech Connect

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.

NONE

1997-07-01

259

Floating ice platforms: offshore oil exploration  

Microsoft Academic Search

Exploratory drilling offshore in the Canadian Arctic Islands in water depths of 200-1300 ft from floating platforms of thickened ice has proven very successful, reports Fenco Consultants Ltd. Designs based on elastic-plate theory have produced strong platforms that behaved much as predicted. In designing the platforms, Fenco used reduced-modulus concepts to estimate creep effects and long-term deflections, making possible the

D. M. Masterson; H. R. Kivisild

1980-01-01

260

Rig utilization rises as offshore drilling recovers  

SciTech Connect

The world offshore drilling outlook for 1984 is one of cautious optimism. There are bright spots, particularly in the U.S. Gulf Coast, where huge amounts of new federal acreage became available to drillers in 1983 and 1984. Figures from the May and August 1983 federal Gulf of Mexico sales are shown. Many new discoveries, including those in Matagorda Island and in Eugene Island Block 315, continue to enhance the outlook.

Brundage, H.T.

1984-02-01

261

Protective riser-conductor for offshore structures  

SciTech Connect

A protective sleeve for fitting about the periphery of the leg of an offshore structure. The sleeve comprises means for carrying and enclosing a plurality of conductors. It further includes one or more inner rings; an outer jacket is fixedly spaced from the rings to define longitudinal passages within which the respective conductors are fixedly positioned. The sleeve is capable of deflecting packed ice and floating objects which represent possible sources of damage to the structure or to conductors.

Rutherford, D. A.; Albers, G. P.

1985-07-09

262

Arctic and offshore research: Technology status report  

SciTech Connect

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.

Not Available

1988-01-01

263

Mobile offshore structure for arctic exploratory drilling  

SciTech Connect

An offshore exploratory drilling floatable structure ballastable to rest on a sea floor but to extend above water level when so supported and adapted to withstand arctic ice loads, comprising a substantially vertical wall capable of withstanding arctic ice loads; a structural load bearing bottom rigidly connected to a lower portion of the wall; and a floatable vertically displaceable load bearing structural deck inside the wall.

Hale, D. R.; Orndorff Jr., J. A.; Owen, W. A.

1985-04-23

264

CATHODIC PROTECTION RETROFIT OF AN OFFSHORE PIPELINE  

Microsoft Academic Search

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

Robert Winters; Alan Holk

1997-01-01

265

Activity-based funding model provides foundation for province-wide best practices in renal care.  

PubMed

British Columbia has a unique funding model for renal care in Canada. Patient care is delivered through six health authorities, while funding is administered by the Provincial Renal Agency using an activity-based funding model. The model allocates funding based on a schedule of costs for every element of renal care, excluding physician fees. Accountability, transparency of allocation and tracking of outcomes are key features that ensure successful implementation. The model supports province-wide best practices and equitable care and fosters innovation. Since its introduction, the outpatient renal services budget has grown less than the population, while maintaining or improving clinical outcomes. PMID:24485244

Levin, Adeera; Lo, Clifford; Noel, Kevin; Djurdjev, Ogjnenka; Amano, Erlyn C

2013-01-01

266

U.S. Balance-of-Station Cost Drivers and Sensitivities (Presentation)  

SciTech Connect

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 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 U.S. offshore wind plants.

Maples, B.

2012-10-01

267

Equipment selection reduces workover costs  

SciTech Connect

Use of a concentric tubing workover rig recently resulted in a 34% savings over budgeted workover costs of a 7,000-ft offshore Louisiana well. The savings of more despite inclement weather that resulted in the loss of 3 to 4 days working time. Purpose of the workover was to economically restore production in a dually completed gas well with excess water production. The method proposed included removal of the packer and two strings of 23/8-in. tubing, setting a bridge plug, and recompleting the well in a targeted zone about 150 ft above the existing upper producing interval.

Collins, B.

1983-05-01

268

26th Annual offshore technology conference: 1994 Proceedings  

SciTech Connect

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.

Not Available

1994-01-01

269

33 CFR 147.T08-849 - DEEPWATER HORIZON Mobile Offshore Drilling Unit Safety Zone.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false DEEPWATER HORIZON Mobile Offshore Drilling Unit...ZONES § 147.T08-849 DEEPWATER HORIZON Mobile Offshore Drilling Unit...zone. This area surrounds the DEEPWATER HORIZON, a Mobile Offshore...

2010-07-01

270

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

Code of Federal Regulations, 2010 CFR

...Countermeasure Plan requirements for offshore oil drilling, production, or workover facilities...Plan requirements for offshore oil drilling, production, or workover facilities...owner or operator of an offshore oil drilling, production, or workover...

2010-07-01

271

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

Code of Federal Regulations, 2010 CFR

...Countermeasure Plan requirements for offshore oil drilling, production, or workover facilities...Plan requirements for offshore oil drilling, production, or workover facilities...owner or operator of an offshore oil drilling, production, or workover...

2009-07-01

272

33 CFR 165.1156 - Safety Zone; Offshore Marine Terminal, El Segundo, CA.  

Code of Federal Regulations, 2010 CFR

...false Safety Zone; Offshore Marine Terminal, El Segundo, CA. 165.1156...1156 Safety Zone; Offshore Marine Terminal, El Segundo, CA. (a) Location...authorized to use the offshore marine terminal for loading or...

2010-07-01

273

Costing: General Considerations.  

National Technical Information Service (NTIS)

Contents: Profit v/s profitability; Elements of cost; Cost classification (functional costs, attributable costs - direct/indirect); Variable/fixed costs; Total cost; Statements of total cost; Cost center and cost unit; Absorption costing v/s marginal cost...

J. Pochun

1984-01-01

274

Assessing Activity-Based Learning for a Networked Course.  

ERIC Educational Resources Information Center

Describes a qualitative study of student and tutor perspectives on the assessment of an innovative undergraduate course at the Open University (United Kingdom), which has employed an activity-based approach. Discusses the relationship between assessment, student participation, and the development of skills, and outlines the priorities for the…

McDonald, Janet; Twining, Peter

2002-01-01

275

Activity Based Curriculum for Elementary Education. Additional Activities, K-6.  

ERIC Educational Resources Information Center

This elementary curriculum is a vehicle to provide manipulative activities that reinforce academic skills through meaningful, relevant, activity-based awareness of modern society. The twenty-six activity plans included in the curriculum place a major emphasis upon realistic or concrete experiences that deal with the manipulation and exploration of…

Wichita Public Schools, KS.

276

Graduate Students' Attitudes in an Activity-Based Statistics Course.  

ERIC Educational Resources Information Center

This study investigated graduate students' attitudes toward statistics in a class in which the focus of instruction was the use of a computer program that made possible an individualized, self-paced student-centered, activity-based course. The six sections involved in the study were offered in 2001 and 2002. There were 43 participants for whom…

Kennedy, Robert L.; McCallister, Corliss Jean

277

Arctic and offshore research. Technology status report  

SciTech Connect

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.

Not Available

1984-10-01

278

Four essays on offshore wind power potential, development, regulatory framework, and integration  

NASA Astrophysics Data System (ADS)

Offshore wind power is an energy resource whose potential in the US has been recognized only recently. There is now growing interest among the coastal states to harness the resource, particularly in states adjacent to the Mid-Atlantic Bight where the shallow continental shelf allows installation of wind turbines using the existing foundation technology. But the promise of bountiful clean energy from offshore wind could be delayed or forestalled due to policy and regulatory challenges. This dissertation is an effort to identify and address some of the important challenges. Focusing on Delaware as a case study it calculates the extent of the wind resource; considers one means to facilitate resource development---the establishment of statewide and regional public power authorities; analyzes possible regulatory frameworks to manage the resource in state-controlled waters; and assesses the use of distributed storage to manage intermittent output from wind turbines. In order to cover a diversity of topics, this research uses a multi-paper format with four essays forming the body of work. The first essay lays out an accessible methodology to calculate offshore wind resource potential using publicly available data, and uses this methodology to access wind resources off Delaware. The assessment suggests a wind resource approximately four times the average electrical load in Delaware. The second essay examines the potential role of a power authority, a quasi-public institution, in lowering the cost of capital, reducing financial risk of developing and operating a wind farm, and enhancing regional collaboration on resource development and management issues. The analysis suggests that a power authority can lower the cost of offshore wind power by as much as 1/3, thereby preserving the ability to pursue cost-competitive development even if the current federal incentives are removed. The third essay addresses the existing regulatory void in state-controlled waters of Delaware. It outlines a regulatory framework touching on key elements such as the leasing system, length of tenure, and financial terms for allocating property rights. In addition, the framework also provides recommendations on environmental assessment that would be required prior to lease issuance. The fourth essay analyzes offshore wind power integration using electric thermal storage in housing units. It presents a model of wind generation, heating load and wind driven thermal storage to assess the potential of storage to buffer wind intermittency. The analysis suggests that thermal load matches the seasonal excess of offshore wind during winter months, and that electric thermal storage could provide significant temporal, spatial, and cost advantages for balancing output from offshore wind generation, while also converting a major residential load (space heating) now met by fossil fuels to low carbon energy resources. Together, the four essays provide new analyses of policy, regulatory, and system integration issues that could impede resource development, and also analyze and recommend strategies to manage these issues.

Dhanju, Amardeep

279

High-alloy materials for offshore applications  

SciTech Connect

High-alloy materials possessing good corrosion resistance in hot, sour brines are being seriously considered for offshore applications. These alloys are available in a wide range of strength levels which can be attained by the methods of cold working or precipitation hardening. Results of testing INCONEL alloys 625 and 718 and INCOLOY alloys 825 and 925 for resistance to general corrosion, hydrogen embrittlement, and stress-corrosion cracking (SCC) are presented. This paper also contrasts the range of mechanical properties available in precipitation-hardened materials with properties of cold-worked alloys.

Lemke, T.F.; Harris, J.A.

1983-05-01

280

Spar buoy escape system for offshore platforms  

SciTech Connect

An offshore platform is shown in position over the seabed. An escape chamber in the form of a spar buoy is mounted on a platform and extends from the platform above the surface of the water to below the surface. A cable also extends between the buoy and an anchor located on the seabed remotely from the platform. When the buoy is released from its platform mount and cable winched from the buoy, the buoy is pulled over the anchor to float safely during adverse weather conditions.

Connelly, R. F.

1985-07-09

281

Flow line riser for offshore structure  

SciTech Connect

Riser for an offshore marine platform which includes facilities to receive, treat, and/or store hydrocarbon fluid from a plurality of dispersed submerged wells. The riser includes means to accommodate a plurality of conduits between the platform deck and the floor of the body of water. As a rigid, or non-rigid conduit is pulled downwardly through the riser, it engages a deflecting shoe. The latter deflects the pulled conduit into a direction away from the platform and along the ocean floor, whereby it can readily engage a pipeline, or attach to one of the dispersed wells.

Knowles, J. P.; Mitchell, S. D.; Wheeler, S.

1985-05-28

282

Cathodic protection retrofit of an offshore pipeline  

SciTech Connect

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.

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

1997-09-01

283

Risk management in the North sea offshore industry: History, status and challenges  

NASA Astrophysics Data System (ADS)

There have been major changes in the UK and Norwegian offshore safety regimes in the last decade. On the basis of accumulated experience (including some major accidents), there has been a move away from a rigid, prescriptive approach to setting safety standards; it is now recognised that a more flexible, "goal-setting" approach is more suited to achieving cost-effective solutions to offshore safety. In order to adapt to this approach, offshore operators are increasingly using Quantitative Risk Assessment (QRA) techniques as part of their risk management programmes. Structured risk assessment can be used at all stages of a project life-cycle. In the design stages (concept and detailed design), these techniques are valuable tools in ensuring that money is wisely spent on safety-related systems. In the operational stage, QRA can aid the development of procedures. High quality Safety Management Systems (SMSs), covering issues such as training, inspection, and emergency planning, are crucial to maintain "asdesigned" levels of safety and reliability. Audits of SMSs should be carried out all through the operational phase to ensure that risky conditions do not accumulate.

Smith, E. J.

1995-10-01

284

Infrared inspection applied to offshore platforms: Petrobras experience at Campos Basin  

NASA Astrophysics Data System (ADS)

Bacia de Campos (Rio de Janeiro - Brazil) is one of the biggest offshore petroleum fields in the world today. In June 2001, Bacia de Campos, having more than 490 oil wells, 34 offshore platforms and 7 modified ships in operation, reached 1,3 million barrels/day. If compared to OPEP countries only nine of them got an average production higher than 1 million barrels/day in 2000, which means it can be placed on the 10th position in the rank of oil producers. In this context this work aims not only to show the results achieved within the introduction of thermographic inspections in offshore oil production (platforms and ships), but also the financial results (ROI - Return of Investment) considering the use of this particular technique. Bacia de Campos got a ROI around 7 million dollars in the last 4 years, which means a hundred times higher than the total cost of thermographic services in the same period. As far as we know this is one of the best results already reported in the world. We also present the methodology applied to analyze thermal anomalies in electrical components and data management software, including advanced Digital Reports sent via Internet.

Verdini, Edson A.; Veratti, Attilio B.

2002-03-01

285

Review of Methodologies for Offshore Wind Resource Assessment in European Seas  

NASA Astrophysics Data System (ADS)

The wind resource offshore is generally larger than at geographically nearby onshore sites, which can offset the higher installation, operation and maintenance costs associated with offshore wind parks. Successful offshore wind energy development relies to some extent on accurate prediction of wind resources, but since installing and operating a meteorological mast in situ is expensive, prospective sites must be carefully evaluated. Accordingly, one can conceptualize the wind resource assessment process as a two-phase activity: ( i) an evaluation of wind resources at the regional scale to locate promising wind farm sites and ( ii) a site specific evaluation of wind climatology and vertical profiles of wind and atmospheric turbulence, in addition to an assessment of historical and possibly future changes due to climate non-stationarity. Phase ( i) of the process can involve use of in situ observations of opportunity derived from ships, lighthouses and buoys in conjunction with model tools and remote sensing products. The reliability of such data sources has been extensively investigated in different national and European projects especially in Northern Europe, and the results are summarized herein. Phase ( ii) of the project often still requires in situ observations (which may or may not be supplemented with ground-based remote sensing technologies) and application of tools to provide a climatological context for the resulting measurements. Current methodologies for undertaking these aspects of the resource assessment are reviewed.

Sempreviva, A. M.; Barthelmie, R. J.; Pryor, S. C.

2008-12-01

286

Hydraulics in oil drilling from offshore mobile platforms  

SciTech Connect

Because of the requirement for rapid operation of subsea safety equipment when drilling from offshore mobile platforms, special hydraulic equipment is required. This paper discusses the features of hydraulic control systems used for operation of subsea blowout preventer equipment from offshore floating drilling rigs. Special features of the hydraulic equipment are discussed along with specific requirements which influence component designs and performance evaluations.

Benson, P.R.

1982-11-01

287

Oil rigs and offshore sport fishing in Louisiana  

Microsoft Academic Search

The environmental effects of Louisiana's offshore oil platforms are discussed with regard to an increase in sport-fishing. The effects upon fish populations, species diversity, underwater habitats, and food chains from the offshore platforms are obtained from several summaries of studies undertaken between 1970-1979. (DS)

R. Dugas; V. Guillory; M. Fischer

1979-01-01

288

Oil rigs and offshore sport fishing in Louisiana  

Microsoft Academic Search

Forty years ago, offshore sport fishing in Louisiana was almost nonexistent. Offshore oil drilling platforms are the primary cause of the present increase in sport fishing in this area. Algae and other organisms forming the first step in the food chain cluster around the subsurface structures of the rigs, attracting fish that seek food and shelter. Major game species frequenting

R. Dugas; V. Guillory; M. Fischer

2009-01-01

289

Computational methods. [Calculation of dynamic loading to offshore platforms  

Microsoft Academic Search

With regard to the computational methods for hydrodynamic forces, first identification of marine hydrodynamics in offshore technology is discussed. Then general computational methods, the state of the arts and uncertainty on flow problems in offshore technology in which developed, developing and undeveloped problems are categorized and future works follow. Marine hydrodynamics consists of water surface and underwater fluid dynamics. Marine

Maeda

1993-01-01

290

Advances in offshore oil and gas pipeline technology  

SciTech Connect

This book examines the problems involved in the offshore transport of petroleum and natural gas. Topics considered include geotechnical considerations, pipeline lay-stress analysis, pipeline reeling, buckling, pipeline trenching by ploughing, the automated connection of offshore pipelines, concrete coatings, cathodic protection, spanning problems, inspection, emergency repair, safety, reliability, pressure effects, marine risers, and single point mooring systems.

delaMare, R.F.

1985-01-01

291

New Horizons for Offshore Wind Energy: Shifting Paradigms and Challenges  

Microsoft Academic Search

The placing of wind turbines offshore is likely to lead to developments of the technology as far-reaching as those which turned the crude onshore machines of the early 1980s into the elegant giants of today. This article discusses the acute need of development of offshore wind energy converting systems. The development of different design techniques and the economics of these

T. S. BHATTI; D. P. KOTHARI

2005-01-01

292

Map of Offshore Wind Energy Activity in North America  

NSDL National Science Digital Library

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.

Project, North A.

293

International Collaboration on Offshore Wind Energy Under IEA Annex XXIII  

SciTech Connect

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.

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

2005-11-01

294

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...

295

Organisational factors, safety attitudes and workload among offshore oil personnel  

Microsoft Academic Search

The aim of this article is to show how job stress, physical working conditions, commitment and involvement in safety work, and attitudes towards safety and accident prevention work among employees on offshore petroleum platforms have changed from 1990 to 1994. In 1990 a self-completion questionnaire survey was carried out among personnel on offshore oil installations in the Norwegian part of

T Rundmo; H Hestad; P Ulleberg

1998-01-01

296

Conventional Generation for Balancing 6 GW Offshore Wind Power  

Microsoft Academic Search

The Dutch government has set the objective of 6 GW installed offshore wind power capacity by 2020. Due to the variability and unpredictability of wind power production, this amount of offshore wind power can be foreseen to have large consequences for power system balancing in the Netherlands. Notably, Dutch wind power is subject to program responsibility like any other energy

B. C. Ummels; M. Gibescu; W. L. Kling; G. C. Paap

297

Offshore Oil: Environmental Impacts on Land and Sea  

ERIC Educational Resources Information Center

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)

Baldwin, Pamela L.

1974-01-01

298

Transmission expansion issues for offshore wind farms integration in Europe  

Microsoft Academic Search

This paper presents an overview of the major issues concerning the expansion of the European transmission system for the connection and for the integration of offshore wind farms. These issues are basically related to: i) the connection solutions for offshore wind farms (infrastructures at sea), ii) the reinforcement of the onshore transmission system for accommodating the power produced by the

Paola Bresesti; Wil L. Kling; Riccardo Vailati

2008-01-01

299

Assessment of off-shore wind farms in Malaysia  

Microsoft Academic Search

A lot of attention is being paid to wind energy due to the focus on renewable energy. Malaysia is situated in the equatorial region and its climate is governed by the monsoons. Wind resource in Malaysia varies from one location to another. Wind speed is better offshore compared to onshore, so more contribution by offshore wind powers in terms of

S. Mekhilef; D. Chandrasegaran

2011-01-01

300

Globalisation and the continuing appeal of offshore finance  

Microsoft Academic Search

Since the late 1990s Offshore Finance Centres (OFCs) have been engaged in ongoing dialogue with multilateral organisations and supranational institutions such as the EU and OECD. This is directed at improving transparency and implementing exchange of information agreements with countries that believe their tax revenues are undermined by offshore products and services. International pressure was initially perceived as a threat

Gregory Rawlings

301

Offshore wind farm with a series multiterminal CSI HVDC  

Microsoft Academic Search

This paper presents an integrated design of an offshore wind farm and an interconnection circuit based on a series multiterminal HVDC link with current source inverters (CSI). The transmission converters are used to achieve variable speed operation for a group of generators, and this enables use of very simple generators. The series converter connection eliminates offshore transformers. The paper discusses

Dragan Jovcic

2008-01-01

302

Research on pitch control of floating offshore wind turbines  

Microsoft Academic Search

This article mainly focuses on individual pitch control of floating offshore wind turbines. Regarding to the power and movement control of offshore wind turbines, we apply experts PID control to the design of controller. In order to verify the feasibility of controller, simulation experiments have been run on FAST. The result shows individual pitch control technique can effectively reduce pitching

Hongche Guo; Xiaoping Lu; Tianyu Qiu

2012-01-01

303

Integration of large offshore wind farms into the power system  

Microsoft Academic Search

Tins paper deals with the integration of large offshore wind farms into the power system. Some main technical issues with regard to the connection of offshore wind farms, such as the HVDC and HVAC transmission systems, the general impact of large scale wind power on the power system operation, and the grid code requirement for wind farms, are reviewed and

H. Guo; K. Rudion; Z. A. Styczynski

2011-01-01

304

The concept of self-maintained offshore wind turbines  

Microsoft Academic Search

Summary The objective of on-going research on the concept of self-maintained offshore wind turbines is to develop a design methodology to increase the availability for offshore wind farms, by means of an intelligent maintenance system capable of responding to faults by reconfiguring the system or subsystems, without increasing service visits, economics, or complexity. The design methodology explained in the paper

E. Echavarria; T. Tomiyama; G. J. W. van Bussel

305

Jacks perform balancing act. [Offshore platform leveling jacks  

Microsoft Academic Search

Three jacket leveling systems are described in this article. These jacks are used to level and align offshore platforms in deep water and under adverse weather conditions. One of these jacks, the jacket jack, was used to successfully level 2 platforms located on the west coast in offshore wastes. The climbing jacks were recently used for leveling operations on the

R. M. Brem; D. E. Sculley

1981-01-01

306

Management of offshore wastes in the United States  

Microsoft Academic Search

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.,

Veil

1998-01-01

307

Offshore oil and gas development planning model incorporating risk analysis  

Microsoft Academic Search

This research describes the formulation of an Offshore Development Planning Model which can evaluate numerous alternative methods of developing an offshore discovery. A decision tree approach is employed to organize the sequence of interrelated decisions involved in the drilling, production and transport of oil and gas. Each path through the decision tree represents a particular development plan or alternative. A

Faecke

1982-01-01

308

26th Annual offshore technology conference: 1994 Proceedings  

SciTech Connect

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.

Not Available

1994-01-01

309

Offshore oil and gas: global resource knowledge and technological change  

Microsoft Academic Search

It is argued that the contribution of technological change to the offshore oil and gas industry's progress is under-researched. As a prelude this theme, the changing geography of known offshore oil and gas resources is reviewed. Significant, and largely technologically dependent, developments are identified in terms of the industry's global spread, its extension into deep and ultradeep waters and its

David Pinder

2001-01-01

310

The potential role of offshore standby/rescue ships  

SciTech Connect

The loss of the drilling rig ''Sea Gem'' in 1966, in which thirteen people died, was perhaps the first occasion when a major accident connected with offshore explorations and production in the UK Sector of the North Sea resulted in multiple deaths. Since then, loss of life among offshore workers, either through major accidents or individuals falling overboard, has continued to occur throughout the various operational areas worldwide. One method of increasing the survival chances of maritime casualties associated with offshore installations is to ensure that a designated rescue vessel is always available to attempt a rescue. At present in the UK, Regulation 10 of the Offshore Installations (Emergency Producures) Regulations 1976, lays down that a standby vessel should be present within five miles of every manned offshore installation, ready to give assistance in an emergency, able to accommodate the entire crew of the installation, and provide aid for them all.

McDonald, H.G.

1985-01-01

311

Management of offshore wastes in the United States.  

SciTech Connect

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.

Veil, J. A.

1998-10-22

312

Modernized controls improve offshore Abu Dhabi operations  

SciTech Connect

Abu Dhabi Marine Operating Co. (ADMA-OPCO) is investing in automation technologies to optimize safety, productivity, and environmental compliance. In the Umm Shaif offshore field in Abu Dhabi, it commissioned a new distribution control system, the Bailey INFI90 Open system from Elsag Bailey Process Automation. The Umm Shaif field produces both crude oil and natural gas. Although the Arabian Gulf waters are relatively shallow and lack severe storms, Elsag Bailey describes the operating challenges as the intense heat (approaching 120 F during the summer) and salty humidity. Added to these are the isolation, safety, and environmental concerns associated with any offshore facility. Faced with aging control systems, ADMA-OPCO began modernizing the systems in 1990. The new systems will provide real-time process management of information for the operators. As part of the modernization program, the Bailey systems were installed on-board both the Umm Shaif and Zakum platforms, and at nearby Das Island, where oil and gas from the two fields are processed.

NONE

1998-11-16

313

SKS Splitting offshore California from ALBACORE  

NASA Astrophysics Data System (ADS)

The development and evolution of the Pacific-North America plate boundary offshore Southern California is of great geodynamical interest. For better understanding, the Asthenospheric and Lithospheric Broadband Architecture from the California Offshore Region Experiment (ALBACORE) was initiated. ALBACORE is a network of 24 broadband and 10 short-period ocean bottom seismometers (OBSs) deployed across the southwestern region of the Pacific-North American plate boundary. Other than at scattered island stations present seismic array data ends at the coastline due to the difficulty of measurements further to sea. The experiment is intended to study many aspects of the Pacific-North American plate boundary. In this study we calculate SKS splitting parameters in an effort to measure the anisotropy of the region. The first step involved determining the orientations of each seismometer due to twisting during deployment. P wave arrivals are used and waveforms of each OBS are compared to nearby island stations of the California Seismic Network. The horizontal waveforms from the OBS's are rotated until the rotated components achieved maximum correlation with North and East components at a nearby station. The rotation angle is further constrained by particle motion. Once orientations are established, we calculate SKS splitting parameters by minimizing energy in the transverse component.

Ramsay, J.; Davis, P. M.; Kohler, M. D.

2012-12-01

314

Seismic stratigraphy of the offshore Nile delta  

SciTech Connect

The seismic stratigraphy of the offshore Nile delta has been established using a 10,000-km Merlin reprocessed regional seismic database. This paper focuses on the Neogene interval in which three major seismic super sequences have been recognized. The oldest (super sequence A) is a thick sheet unit of middle Miocene age composed of marine shales and sandstones, affected in places by shale diapirism. The upper super sequence, of Pliocene age (C), is characterized by progradation complicated by both slumping and faulting. These sediments represent deposits from the present Nile delta system, a relatively recent event. Between super sequences A and C lies a thin upper Miocene - lowermost Pliocene unit (super sequence B). This unit can be divided into three sequences, the upper and lower of which (Abu Madi and Oawasim Formations, respectively) are characterized by widespread channeling. The intermediate Messinian sequence, commonly evaporitic, may also be associated with channeling episodes. Potential hydrocarbon plays exist in all three super sequences, and varied trapping mechanisms may be invoked. Dip closures are associated with both rollover on listric normal faults and shale diapirism. Stratigraphic trap potential involves both truncation of C beneath B, occasionally associated with severe angular unconformity, and super sequence B channeling. The Abu Madi channel-fill sand bodies form the primary exploration target. Despite only 12 offshore wells drilled, there have already been gas discoveries (Abu Qir field, Naf-1 well) which, together with recent changes in Egyptian hydrocarbon legislation, make this region an attractive exploration province.

Kilenyi, T.; Trayner, P.; Doherty, M.; Jamieson, G.

1988-08-01

315

Gladden Pull-Apart Basin, offshore Belize  

SciTech Connect

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 recent fault movement appears to have depleted the shallow structures to the west, but the pull-apart basin has a thick sequence of low-frequency clay-dominated sealing rocks with the potential to preserve hydrocarbon accumulations in Cretaceous carbonate banks. These buried carbonate are of the same age and depositional environment of Mexico's Golden Lane/Tabasco Reforma carbonate banks which are world class giant fields. The Belize and Mexican carbonate banks are within the same Cretaceous depositional basin, the Peten Basin. Seismic interpretations in offshore Belize have been integrated with gravity and magnetic surveys. This provides additional support for the deep extensional basin. The location of the thick Cretaceous carbonate banks is better interpreted with the integration of these three geophysical tools. Airborne geochemical surveys were used to detect the presence of oil seeps on the east and west basin margins.

Morrice, S. (BNR Ltd., Denver, CO (United States))

1993-02-01

316

Cost-Effective Condition Monitoring for Wind Turbines  

Microsoft Academic Search

Cost-effective wind turbine (WT) condition monitoring assumes more importance as turbine sizes increase and they are placed in more remote locations, for example, offshore. Conventional condition monitoring techniques, such as vibration, lubrication oil, and generator current signal analysis, require the deployment of a variety of sensors and computationally intensive analysis techniques. This paper describes a WT condition monitoring technique that

Wenxian Yang; Peter J. Tavner; Christopher J. Crabtree; Michael Wilkinson

2010-01-01

317

Design, operation and availability analysis of a multi-terminal HVDC grid - A case study of a possible Offshore Grid in the Norwegian Sea  

Microsoft Academic Search

Multi-terminal HVDC subsea cable grids have the ability to integrate offshore wind power and petroleum installations with the main land, as well as transferring energy in parallel with the onshore AC grid. Such grids have presumably lower investment costs than radial cables to each installation. It is shown in this paper that the reliability is higher as well. The operation

O. Rui; C. Ohlen; J. Solvik; J. Thon; K. Karijord; T. Gjengedal

2011-01-01

318

Endowments of undiscovered conventionally recoverable and economically recoverable oil and gas in the Alaska federal offshore as of January 1995. Final report  

SciTech Connect

The report summarizes the Minerals Management Service assessment of the quantities of undiscovered oil and gas that lie beneath submerged Federal lands offshore of Alaska. Resource estimates include both the geologic endowment, consisting of conventionally recoverable resources unconstrained by economics, as well as the more modest quantities of oil and gas that can be recovered profitably, considering the costs associated with producing the resource.

Sherwood, K.W.; Craig, J.D.; Cooke, L.W.

1996-05-01

319

Fluid additive and specialized PDC bits improve ROP in offshore applications  

SciTech Connect

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.

Jones, T.A.

1997-02-01

320

Activity-based proteomics: enzymatic activity profiling in complex proteomes  

Microsoft Academic Search

Summary.  In the postgenomic era new technologies are emerging for global analysis of protein function. The introduction of active site-directed\\u000a chemical probes for enzymatic activity profiling in complex mixtures, known as activity-based proteomics has greatly accelerated\\u000a functional annotation of proteins. Here we review probe design for different enzyme classes including serine hydrolases, cysteine\\u000a proteases, tyrosine phosphatases, glycosidases, and others. These probes

H. Schmidinger; A. Hermetter; R. Birner-Gruenberger

2006-01-01

321

Tracking Costs  

ERIC Educational Resources Information Center

Even though there's been a slight reprieve in energy costs, the reality is that the cost of non-renewable energy is increasing, and state education budgets are shrinking. One way to keep energy and operations costs from overshadowing education budgets is to develop a 10-year energy audit plan to eliminate waste. First, facility managers should…

Erickson, Paul W.

2010-01-01

322

A Study on the Calculable Method about Business Logistics Cost  

Microsoft Academic Search

Based on logistics cost calculational method of Activity-based costing, the thesis puts forward a new calculational method about business logistics cost based on a combination of activity and time, presents a computation model of this method, And compares this method with ABC method through analyzing a case.

Guo-qing Zhang; Long-qing Liu

2009-01-01

323

Manufacturing cost analysis of integrated photonic packages  

NASA Astrophysics Data System (ADS)

This paper analyzes the manufacturing cost of photonic system using software that combines several methods for accurate cost accounting. Activity based costing assigns al capital equipment, material and labor costs directly to the product rather than to overheads. Cost of ownership models determine the cost of using machines under different financial and utilization scenarios. Libraries of standard machines, process steps, and process sequences facilitate rapid model building and modification. Using libraries for semiconductor and photonics fabrication, along with packaging and optomechanical assembly, we construct cost models for 2D VCSEL array communication modules. The result of the analysis is that the model cost is driven mainly by the epitaxial material cost, and laser yield limits VCSEL arrays to small scale integration.

Stirk, Charles W.; Liu, Qin; Ball, Matthew

1999-04-01

324

Washing ashore: The politics of offshore oil in northern Angola  

NASA Astrophysics Data System (ADS)

This dissertation examines the political ecology of Angolan oil, by exploring state and corporate political economies; historical convergences of violence and capital; and struggles over the costs and benefits of oil production from the perspective of artisanal fishing and farming communities in the extractive zones. Angola is sub-Saharan Africa's second-largest oil producer but revenues from the enclave sector in oil rarely trickle down to the impoverished populace. The Angolan government strategically invests petrodollars in patronage networks to bolster their power; and watchdog agencies claim top officials divert the balance to offshore accounts. While the enclaved nature of production facilitates the restricted distribution of oil monies by concentrating services and revenue streams, the distortions and externalities that bleed out from these enclaves increase the misery of Angolans---especially those living in the extractive zones. By focusing on the lived experience of extraction, I explore the politics of oil through the forms of violence and degradation threatening the lives and livelihoods of local people. Most of Angola's oil is produced from offshore fields, so oil spills present a considerable risk to the health of local communities and ecosystems. The fishers and fish traders suffering from oil spills demand compensation from the liable oil corporations, yet the skewed system of disbursements only reaches the most powerful claimants. Moreover, faced with a repressive and unresponsive government, communities in extractive zones have come to rely on the same corporations for schools and health posts in a system I refer to as oil-backed development. I demonstrate that local histories of violence, national political exigencies, and transnational corporate interests govern the distribution of oil-backed development projects. Furthermore, I argue that the Angolan government leverages corporate donations for development to suit its own exclusionary interests and to gain control over dissidents and resources. In this way, oil-backed development complements more militant forms of territorialization while maintaining the exclusionary institutions and corrupt leadership that deprive Angolans of a fair share of the country's resource wealth.

Reed, Kristin Michelle

325

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

USGS Publications Warehouse

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.

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

2011-01-01

326

Quantifying the hurricane catastrophe risk to offshore wind power.  

PubMed

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

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

2013-12-01

327

Offshore platform structure for artic waters  

SciTech Connect

An offshore platform structure of the gravity type intended to be installed on a sea bed in artic or corresponding waters. The platform structure comprises a substructure intended to be completely submerged and supported by the sea bed when in installed position, a superstructure extending up from the substructure and up above the sea bed and a deck superstructure supported by the superstructure above the sea level. A fender is provided intended to protect the superstructure against drifting ice and icebergs, the substructure being provided with a preferably horizontal top support slab supporting the fender, the fender being movably arranged on said support slab and comprising a preferably compartmented cylindrical ring-shaped body with a large weight resting preferably freely on the substructure, intended to be arranged apart from the superstructure when in normal position.

Einstabland, T.

1984-11-27

328

Reusable offshore platform with skirt piles  

SciTech Connect

This patent describes a reusable apparatus for securing a skirt pile to a platform. It comprises a skirt pile sleeve secured to the leg of an offshore platform, the sleeve having upper and lower end openings sized and configured to accept a skirt pile therethrough; an insert positioned within the sleeve and extending beyond both the end openings of the sleeve, the insert located intermediate the sleeve and the skirt pile; first connecting means for securing the sleeve to the insert, the first connecting means comprising upper and lower shims securing the insert to the sleeve, the shims being positioned around the perimeter of the upper and lower end openings whereby bending and axial forces are directly transferred from the sleeve to the insert via the upper and lower shims; and second connecting means for securing the insert to the pile whereby bending and axial forces are directly transferred from the insert to the pile.

Gray, D.W.

1991-07-02

329

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.

330

Environmental load uncertainties for offshore structures  

SciTech Connect

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.

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

331

Offshoring manufacturing: Implications for engineering jobs and education: A survey and case study  

Microsoft Academic Search

One result of globalization is the rapid growth of offshoring, i.e., the outsourcing of functions and jobs to offshore locations. In the USA, offshoring has progressed to the point where it already affects everyday lives, from the cars we drive (of which a large portion of the work and components are outsourced) to computers (which are typically manufactured offshore and

Bopaya Bidanda; Ozlem Arisoy; Larry J. Shuman

2006-01-01

332

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

Microsoft Academic Search

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

Yen-Chun Chou; Robert J. Kauffman

2010-01-01

333

Meteorological aspects of offshore wind energy: Observations from the Vindeby wind farm  

Microsoft Academic Search

The Vindeby monitoring project has been established to provide information on the world's first offshore wind farm at Vindeby, Denmark. Over the course of the project, different aspects of offshore meteorology which are relevant to offshore wind energy production will be examined in addition to turbine loading and behaviour in offshore conditions. Here, the simplest aspects of coastal meteorology are

R. J. Barthelmie; M. S. Courtney; J. Højstrup; S. E. Larsen

1996-01-01

334

The key technology of offshore wind farm and its new development in China  

Microsoft Academic Search

The paper reviews characteristics and the developing state of abroad offshore wind farm briefly, and the key technology related to offshore wind farm. The optimization configuration and assessment of abroad offshore wind farm, and rational distribution assess, offshore wind farm electric transmission technology, system insert with operating, wind farm MES and wind turbine base, etc., are studied to put forward

Wang Zhixin; Jiang Chuanwen; Ai Qian; Wang Chengmin

2009-01-01

335

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

SciTech Connect

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.

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

2014-01-01

336

BOSS '94: Behaviour of offshore structures. Volume 1. Geotechnics  

SciTech Connect

The 1994 Conference on the Behavior of Offshore Structures (BOSS) is concerned with the design, construction, and installation of structures used for the development of offshore oil and gas fields. Boss '94 continues the tradition with technical sessions presenting more than 100 state-of-the-art technical papers. Volume I of the proceedings contains 22 papers on the geotechnics of offshore platform construction. A separate abstract and indexing have been prepared for each of the papers for inclusion in the Energy Science and Technology Database.

Chryssostomidis, C.; Triantafyllou, M.S.; Whittle, A.J.; Hoo Fatt, M.S. (eds.)

1994-01-01

337

Enzyme inhibitor discovery by activity-based protein profiling.  

PubMed

Eukaryotic and prokaryotic organisms possess huge numbers of uncharacterized enzymes. Selective inhibitors offer powerful probes for assigning functions to enzymes in native biological systems. Here, we discuss how the chemical proteomic platform activity-based protein profiling (ABPP) can be implemented to discover selective and in vivo-active inhibitors for enzymes. We further describe how these inhibitors have been used to delineate the biochemical and cellular functions of enzymes, leading to the discovery of metabolic and signaling pathways that make important contributions to human physiology and disease. These studies demonstrate the value of selective chemical probes as drivers of biological inquiry. PMID:24905785

Niphakis, Micah J; Cravatt, Benjamin F

2014-06-01

338

Design, manufacturing and tests of first cryogen-free MgB2 prototype coils for offshore wind generators  

NASA Astrophysics Data System (ADS)

Although renewable sector has started to take advantage of the offshore wind energy recently, the development is very intense. Turbines reliability, size, and cost are key aspects for the wind industry, especially in marine locations. A superconducting generator will allow a significant reduction in terms of weight and size, but cost and reliability are two aspects to deal with. MgB2 wire is presented as one promising option to be used in superconducting coils for wind generators. This work shows the experimental results in first cryogen-free MgB2 prototype coils, designed according to specific requirements of TECNALIA's wind generator concept.

Sarmiento, G.; Sanz, S.; Pujana, A.; Merino, J. M.; Iturbe, R.; Apiñaniz, S.; Nardelli, D.; Marino, I.

2014-05-01

339

Current developments in activity-based protein profiling.  

PubMed

Activity-based protein profiling (ABPP) has emerged as a powerful strategy to study the activity of enzymes in complex proteomes. The aim of ABPP is to selectively visualize only the active forms of particular enzymes using chemical probes termed activity-based probes (ABPs). These probes are directed to the active site of a particular target protein (or protein family) where they react in a mechanism-based manner with an active site residue. This results in the selective labeling of only the catalytically active form of the enzyme, usually in a covalent manner. Besides the monitoring of a specific enzymatic activity, ABPP strategies have also been used to identify and characterize (unknown) protein functions, to study up- and down-regulation of enzymatic activity in various disease states, to discover and evaluate putative new enzyme inhibitors, and to identify the protein targets of covalently binding natural products. In this Topical Review we will provide a brief overview of some of the recent developments in the field of ABPP. PMID:24946272

Willems, Lianne I; Overkleeft, Herman S; van Kasteren, Sander I

2014-07-16

340

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

341

Effects of offshore petroleum operations on cold water marine mammals  

SciTech Connect

This report presents a review of the available literature concerning the acoustic, nonacoustic, and cumulative effects of offshore petroleum operations on marine mammals. Species inhabiting Alaskan waters are emphasized, but the world literature on related species and topics is considered.

Not Available

1989-01-01

342

Microbiologically Influenced Corrosion in Offshore Oil and Gas Systems.  

National Technical Information Service (NTIS)

Stainless steels, copper/nickel and titanium alloys are frequently used in offshore and gas systems. Alloying elements are added to metals to improve workability, electrical properties and corrosion resistance. Alloying elements also alter the formation, ...

B. Little P. Wagner

1993-01-01

343

77 FR 26562 - Mobile Offshore Drilling Unit Dynamic Positioning Guidance  

Federal Register 2010, 2011, 2012, 2013

...Mobile Offshore Drilling Unit Dynamic Positioning Guidance AGENCY: Coast Guard, DHS...regarding a draft policy letter on Dynamic Positioning (DP) Systems, Emergency Disconnect...report ``Recommendations for Dynamic Positioning System Design and Engineering,...

2012-05-04

344

Feasibility of Leak Detection in Process Plant on Offshore Installations.  

National Technical Information Service (NTIS)

The objective of this work was to investigate the use of acoustic methods of leak detection for application on process systems and pipework offshore. Existing gas leak detection systems, based on catalytic bead detectors (pellistors) do not give adequate ...

1981-01-01

345

49 CFR 191.27 - Filing offshore pipeline condition reports.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Filing offshore pipeline condition reports. 191.27 Section...Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION...DEPARTMENT OF TRANSPORTATION (CONTINUED) PIPELINE SAFETY TRANSPORTATION OF NATURAL...

2013-10-01

346

49 CFR 195.57 - Filing offshore pipeline condition reports.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Filing offshore pipeline condition reports. 195.57 Section...Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION...DEPARTMENT OF TRANSPORTATION (CONTINUED) PIPELINE SAFETY TRANSPORTATION OF...

2013-10-01

347

Lower 48's Only Superport: LOOP (Louisiana's Offshore Oil Port).  

National Technical Information Service (NTIS)

Historical aspects, constraints, and the operation of Louisiana's Offshore Oil Port (LOOP) are discussed. The facility is described as well as onshore storage and handling facilities and pipelines servicing LOOP. Similarities between LOOP and the Trans Al...

E. B. Brossard

1984-01-01

348

International Collaboration on Offshore Wind Energy Under IEA Annex XXIII.  

National Technical Information Service (NTIS)

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 enviro...

W. Musial S. Butterfield J. Lemming

2005-01-01

349

Money Laundering: Regulatory Oversight of Offshore Private Banking Activities.  

National Technical Information Service (NTIS)

This report responds to your August 26, 1997, request that we review U.S. regulatory oversight of private banking activitivies involving offshore jurisdictions. You expressed concern that high profile money laundering cases have generally involved the use...

1998-01-01

350

The economic impact of proposed regulations on the discharge of drilling muds and cuttings from the offshore facilities on US undiscovered crude oil reserves  

SciTech Connect

This paper presents the results of an assessment of the potential economic impact of proposed regulations. on the discharge of drilling fluids (muds) and cuttings on US offshore undiscovered crude oil resources. These regulations include proposed Best Available Technology economically achievable (BAT) and New Source Performance Standards (NSPS) effluent limitations under the Clean Water Act governing the discharge of drilling fluids and drill cuttings from offshore oil and gas drilling operations. The impact of the proposed RAT/NSPS regulations for the drilling fluids and drill cuttings disposal on the cost of funding, developing, and producing Lower-48 offshore undiscovered crude oil resources will depend significantly on operators perceptions on the chances of failing toxicity or static sheen tests. If operators, in economically justifying their projects, assume that the fluids fail one of these tests, thereby prohibiting them from being discharged, up to 11% of the economically recoverable offshore resource would be considered uneconomic to produce. This would amount to 845 million barrels of oil at an oil price around $25 per barrel. On the other hand, if operators are willing co take their chances and see if their fluids fail one of these tests, then, based on EPA`s assumptions concerning forecast fluid use and static sheen and toxicity test failure rates, up to 4% of the offshore undiscovered resource would be impacted, amounting to lost reserves of up to 270 million barrels.

Not Available

1989-01-13

351

External costs  

Microsoft Academic Search

The European Commission's ExternE Project has made major advances in the quantification of external costs of electricity. Although some impacts cannot be valued, important conclusions are possible. This paper outlines some provisional implications for energy policy. External costs are technology dependent and for some older power plants are large compared to electricity prices. Global warming and nuclear accidents have very

Nick Eyre

1997-01-01

352

Operation and Control of HVDC-Connected Offshore Wind Farm  

Microsoft Academic Search

This paper presents operation and control strategies of an offshore wind farm interconnected to a high-voltage dc (HVDC) system. The offshore wind farm composed of variable speed wind turbines driving permanent magnet synchronous generators is considered in this study, based on dc-bus concept. The HVDC transmission system based on a three-level neutral point clamped voltage source converter (VSC) is used

S. M. Muyeen; Rion Takahashi; Junji Tamura

2010-01-01

353

Evaluation of offshore stocking of Lake Trout in Lake Ontario  

USGS Publications Warehouse

Restoration stocking of hatchery-reared lake trout Salvelinus namaycush has occurred in Lake Ontario since 1973. In U.S. waters, fish stocked through 1990 survived well and built a large adult population. Survival of yearlings stocked from shore declined during 1990–1995, and adult numbers fell during 1998–2005. Offshore stocking of lake trout was initiated in the late 1990s in response to its successful mitigation of predation losses to double-crested cormorants Phalacrocorax auritus and the results of earlier studies that suggested it would enhance survival in some cases. The current study was designed to test the relative effectiveness of three stocking methods at a time when poststocking survival for lake trout was quite low and losses due to fish predators was a suspected factor. The stocking methods tested during 2000–2002 included May offshore, May onshore, and June onshore. Visual observations during nearshore stockings and hydroacoustic observations of offshore stockings indicated that release methods were not a direct cause of fish mortality. Experimental stockings were replicated for 3 years at one site in the southwest and for 2 years at one site in the southeast. Offshore releases used a landing craft to transport hatchery trucks from 3 to 6 km offshore out to 55–60-m-deep water. For the southwest site, offshore stocking significantly enhanced poststocking survival. Among the three methods, survival ratios were 1.74 : 1.00 : 1.02 (May offshore : May onshore : June onshore). Although not statistically significant owing to the small samples, the trends were similar for the southeast site, with survival ratios of 1.67 : 1.00 : 0.72. Consistent trends across years and sites indicated that offshore stocking of yearling lake trout during 2000–2002 provided nearly a twofold enhancement in survival; however, this increase does not appear to be great enough to achieve the 12-fold enhancement necessary to return population abundance to restoration targets.

Lantry, B. F.; O'Gorman, R.; Strang, T. G.; Lantry, J. R.; Connerton, M. J.; Schanger, T.

2011-01-01

354

Offshore and inshore wave energy assessment: Asturias (N Spain)  

Microsoft Academic Search

The offshore and inshore wave energy resource in Asturias (N Spain) is studied using wave buoy data and a hindcast dataset spanning 44 years (1958–2001). Offshore average wave power and annual wave energy values are found to exceed 30 kW\\/m and 250 MWh\\/m, respectively, at 7 of the 11 study sites. This substantial resource is characterised in terms of the sea states

G. Iglesias; R. Carballo

2010-01-01

355

Offshore data base shows decline in rig accidents  

SciTech Connect

Institut Francais du Petrole (IFP) has compiled statistical figures on offshore accidents for risk, safety, and reliability studies. IFP calls this data base Platform. It provides a body of essential data for accidents concerning both mobile and stationary offshore drilling rigs. Historical accident data bases are a basic implement for risk assessment of safety and reliability. IFP has built this data base with all available information from 950 actual listings.

Bertrand, A.; Escoffier, L. (Institut Francais du Petrole, Rueil-Maimaison (FR))

1991-09-16

356

Shear effects in shakedown analysis of offshore structures  

Microsoft Academic Search

In this paper, a formulation for shakedown analysis of elastic-plastic offshore structures under cyclic wave loading is presented.\\u000a In this formulation, a fast numerical solution method is used, suitable for the Finite Element Method (FEM) analysis of large\\u000a offshore structures on which shear effects in addition to bending and axial effects are taken into account. The Morison equation\\u000a is adopted

M. J. Fadaee; H. Saffari; R. Tabatabaei

2008-01-01

357

Troubleshooting Costs  

NASA Astrophysics Data System (ADS)

Seventy-six million cases of foodborne disease occur each year in the United States alone. Medical and lost productivity costs of the most common pathogens are estimated to be 5.6-9.4 billion. Product recalls, whether from foodborne illness or spoilage, result in added costs to manufacturers in a variety of ways. These may include expenses associated with lawsuits from real or allegedly stricken individuals and lawsuits from shorted customers. Other costs include those associated with efforts involved in finding the source of the contamination and eliminating it and include time when lines are shut down and therefore non-productive, additional non-routine testing, consultant fees, time and personnel required to overhaul the entire food safety system, lost market share to competitors, and the cost associated with redesign of the factory and redesign or acquisition of more hygienic equipment. The cost associated with an effective quality assurance plan is well worth the effort to prevent the situations described.

Kornacki, Jeffrey L.

358

Geology and hydrocarbon potential of offshore Indus Basin, Pakistan  

SciTech Connect

The Indus offshore basin, located in the south of the Karachi trough and Thar slope, between Murray Ridge and the Indian border (23 to 25/sup 0/N lat.; 66 to 68/sup 0/E long.) has been investigated geologically from the point of view of hydrocarbon potential. Nine wells were drilled in the area: two onshore wells (Karachi 1,2), three wells near the Karachi shore (Dabbo creek, Patiani Creek, and Korangi Creek), one well on the offshore platform (Karachi South A-1), and three wells in offshore depressions (Indus Marine A-1, B-1, and C-1). No oil or gas deposit was discovered, but gas shows and traces were recorded. However, considering the large area (7,700 mi/sup 2/; 20,000 km/sup 2/) the number of wells drilled represents an insufficient effort of exploration and drilling. Tectonically, the Indus offshore basin can be divided into three units: (1) an ofshore depression on the west, between Murray Ridge and the hinge line; (2) the offshore Karachi trough platform in the middle between the hinge and the Karachi shoreline; and (3) offshore Thar slope platform or Indus River deltaic area on the east. The hinge-line zone and the outer margin of the carbonate platform, where there is a possibility of reef buildups, seem to be potential areas for hydrocarbons, and further investigation and drilling for suitable structural traps should be pursued.

Shuaib, S.M.

1982-07-01

359

Conceptual Model of Offshore Wind Environmental Risk Evaluation System  

SciTech Connect

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.

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

2010-06-01

360

Offshore passive soil vapor survey at a contaminated coastal site  

SciTech Connect

A high-resolution passive soil vapor survey was recently conducted at a coastal military base in southern California where a chlorinated and aromatic hydrocarbon plume threatens San Diego Bay. An existing sampling grid was extended offshore the entire length of the contaminated site. PETREX sampling tubes were emplaced conventionally onshore and were emplaced offshore in sandy bay-bottom sediments by divers working in 3 to 17 m (10 to 55 ft) of water. Results of mass spectrometric analysis of passive vapor samples were consistent with submarine ground water discharge measurements made previously with seepage meters, yet also produced one unexpected result: evidence of in situ degradation. Tetrachloroethene (PCE), widespread onshore, was not detected offshore. Trichloroethene (TCE), the primary contaminant onshore, was detected in only three points offshore. Dichloroethene (DCE), present only at trace levels onshore, was the dominant constituent measured in the offshore plume. Results were confirmed by laboratory analyses of sediment samples. The study demonstrated the utility of extending the passive soil vapor technique offshore in up to 17 m (55 ft) of sea water in a heavily trafficked waterway with a strong tidal current.

Anderson, M. [Jacobs Engineering Group Inc., Pasadena, CA (United States); Church, G. [Transglobal Environmental Geochemistry, Burbank, CA (United States)

1998-06-01

361

Potential on-shore and off-shore reservoirs for CO2 sequestration in Central Atlantic magmatic province basalts  

PubMed Central

Identifying locations for secure sequestration of CO2 in geological formations is one of our most pressing global scientific problems. Injection into basalt formations provides unique and significant advantages over other potential geological storage options, including large potential storage volumes and permanent fixation of carbon by mineralization. The Central Atlantic Magmatic Province basalt flows along the eastern seaboard of the United States may provide large and secure storage reservoirs both onshore and offshore. Sites in the South Georgia basin, the New York Bight basin, and the Sandy Hook basin offer promising basalt-hosted reservoirs with considerable potential for CO2 sequestration due to their proximity to major metropolitan centers, and thus to large industrial sources for CO2. Onshore sites are suggested for cost-effective characterization studies of these reservoirs, although offshore sites may offer larger potential capacity and additional long-term advantages for safe and secure CO2 sequestration.

Goldberg, David S.; Kent, Dennis V.; Olsen, Paul E.

2010-01-01

362

Potential on-shore and off-shore reservoirs for CO2 sequestration in Central Atlantic magmatic province basalts.  

PubMed

Identifying locations for secure sequestration of CO(2) in geological formations is one of our most pressing global scientific problems. Injection into basalt formations provides unique and significant advantages over other potential geological storage options, including large potential storage volumes and permanent fixation of carbon by mineralization. The Central Atlantic Magmatic Province basalt flows along the eastern seaboard of the United States may provide large and secure storage reservoirs both onshore and offshore. Sites in the South Georgia basin, the New York Bight basin, and the Sandy Hook basin offer promising basalt-hosted reservoirs with considerable potential for CO(2) sequestration due to their proximity to major metropolitan centers, and thus to large industrial sources for CO(2). Onshore sites are suggested for cost-effective characterization studies of these reservoirs, although offshore sites may offer larger potential capacity and additional long-term advantages for safe and secure CO(2) sequestration. PMID:20080705

Goldberg, David S; Kent, Dennis V; Olsen, Paul E

2010-01-26

363

Women's responses to an activity-based introductory physics program  

NSDL National Science Digital Library

It has been said that women ought to like science courses that are hands-on, collaborative, and afford a high degree of personal attention. In this article we examine this assumption by considering some women's responses to Workshop Physicsâ??a calculus-based introductory course sequence in which lectures are abandoned in favor of activity-based collaborative work enhanced by the use of integrated computer tools. Early in the development of the Workshop curriculum an attitude survey revealed that pre-medical junior and senior women were more negative about their experience than either their male counterparts or freshmen and sophomore students. We explored reasons for this phenomenon by interviewing a group of women who had enrolled in Workshop Physics courses.

Laws, Priscilla W.; Rosborough, Pamela; Poodry, Frances

2005-11-23

364

Women's responses to an activity-based introductory physics program  

NASA Astrophysics Data System (ADS)

It has been said that women ought to like science courses that are hands-on, collaborative, and afford a high degree of personal attention. In this article we examine this assumption by considering some women's responses to Workshop Physics-a calculus-based introductory course sequence in which lectures are abandoned in favor of activity-based collaborative work enhanced by the use of integrated computer tools. Early in the development of the Workshop curriculum an attitude survey revealed that pre-medical junior and senior women were more negative about their experience than either their male counterparts or freshmen and sophomore students. We explored reasons for this phenomenon by interviewing a group of women who had enrolled in Workshop Physics courses.

Laws, Priscilla W.; Rosborough, Pamela J.; Poodry, Frances J.

1999-07-01

365

Psychosocial burden among offshore drilling platform employees.  

PubMed

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

Leszczy?ska, Irena; Je?ewska, Maria

2010-01-01

366

AORIS. Arctic & Offshore Technical Data System  

SciTech Connect

AORIS is a computerized information system to assist the technology and planning community in the development of Arctic oil and gas resources. In general, AORIS is geographically dependent and, where possible, site specific. The main topics are sea ice, geotechnology, oceanography, meteorology, and Arctic engineering, as they relate to such offshore oil and gas activities as exploration, production, storage, and transportation. AORIS consists of a directory component that identifies 85 Arctic energy-related databases and tells how to access them; a bibliographic/management information system or bibliographic component containing over 8,000 references and abstracts on Arctic energy-related research; and a scientific and engineering information system, or data component, containing over 800 data sets, in both tabular and graphical formats, on sea ice characteristics taken from the bibliographic citations. AORIS also contains much of the so-called grey literature, i.e., data and/or locations of Arctic data collected, but never published. The three components are linked so the user may easily move from one component to another. A generic information system is provided to allow users to create their own information systems. The generic programs have the same query and updating features as AORIS, except that there is no directory component.

Pastoria, G.A. [USDOE, Morgantown Energy Tech. Ctr., WV (United States)

1990-05-01

367

Analyzing, solving offshore seawater injection problems  

SciTech Connect

Changes in seawater treatment, necessary cleaning of injection lines, and modifying well completion practices have reduced injection well plugging on pressure maintenance projects operated by Abu Dhabi Marine Operating Co., (Adma-Opco) in Zakum and Umm Shaif fields, offshore Abu Dhabi, in the Arabian Gulf. Plugging was caused primarily by iron sulfide and corrosion products that were displaced down hole after being formed in the water distribution system. These materials, in turn, resulted from O/sub 2/ inadvertently entering the injection system where it combined with corrosive H/sub 2/S generated by sulfate-reducing bacteria. The problem was further compounded by debris peeling from the interior of well tubulars, a high solids content of brine used to complete injectors, and slime formation in injection pipe lines. Acidizing wells proved a quick method for partially restoring injectivity, but a continuing concerted effort is being made to achieve more permanent results by eliminating the O/sub 2/ and H/sub 2/S, which are at the root of the difficulty.

Al-Rubale, J.S.; Muhsin, A.A.; Shaker, H.A.; Washash, I.

1988-01-01

368

Probability Distributions for Offshore Wind Speeds  

NASA Astrophysics Data System (ADS)

In planning offshore wind farms, short-term wind speeds play a central role in estimating various engineering parameters, such as power output, design load, fatigue load, etc. Lacking wind speed data at a specific site, the probability distribution of wind speed serves as the primary substitute for such measurements during parameter estimation. It is common practice to model wind speeds with the Weibull distribution, but recent literature suggests that many other distributions may perform better. Such studies are often limited in either the time-span or geographic scope of their datasets. Using 10-minute average wind speed time series ranging from 1 month to 20 years in duration collected from 178 buoys around North America, we show that the widely-accepted Weibull distribution provides a poor fit to the distribution of wind speeds when compared with other models. For example several other distributions, including the bimodal Weibull, Kappa and Wakeby models, fit the data remarkably well, yielding values significantly closer to 1 than the Weibull and many other distributions. Additionally, we show that the Kappa and Wakeby predict average wind turbine power output better than other distributions, including the bimodal Weibull. Our results show that more complicated models than the two-parameter Weibull are needed to capture the complex behavior of wind, and that using such models leads to improved engineering decisions.

Morgan, E. C.; Lackner, M.; Vogel, R. M.; Baise, L. G.

2009-12-01

369

Offshore oil and gas pipeline technology  

SciTech Connect

This volume is a ''total-systems'' approach to offshore pipeline design, operation, and maintenance. The volume comprises 17 contributed sections reviewing the most important developments in the field over the last few years. The contributors are all internationally recognized experts, and the papers present a broad yet complete review of all aspects of pipeline integrity. Although each topic is treated in depth, the work has been edited with both beginning engineers and experts in mind. Contents include: Deepwater soil analysis for pipelines. The buckling of submarine pipelines. Pipelines lay-stress analysis. Advances in submarine pipeline trenching by ploughing. The remove connection of submarine pipelines. Controlling the internal corrosion of pipelines. Controlling the external corrosion of pipelines using cathodic protection. Pipeline stability and spanning. Pipeline span detection, assessment and correction. Recent developments in pipeline inspection by side-scan sonar. Pipeline safety analysis. Pipeline reliability. A case in pipeline design. Riser design. The operation of gaslines at high pressure. Single point mooring systems-an alternative to pipelines.

Mare, R.F.

1985-01-01

370

The effect of activity-based financing on hospital length of stay for elderly patients suffering from heart diseases in Norway  

PubMed Central

Background Whether activity-based financing of hospitals creates incentives to treat more patients and to reduce the length of each hospital stay is an empirical question that needs investigation. This paper examines how the level of the activity-based component in the financing system of Norwegian hospitals influences the average length of hospital stays for elderly patients suffering from ischemic heart diseases. During the study period, the activity-based component changed several times due to political decisions at the national level. Methods The repeated cross-section data were extracted from the Norwegian Patient Register in the period from 2000 to 2007, and included patients with angina pectoris, congestive heart failure, and myocardial infarction. Data were analysed with a log-linear regression model at the individual level. Results The results show a significant, negative association between the level of activity-based financing and length of hospital stays for elderly patients who were suffering from ischemic heart diseases. The effect is small, but an increase of 10 percentage points in the activity-based component reduced the average length of each hospital stay by 1.28%. Conclusions In a combined financing system such as the one prevailing in Norway, hospitals appear to respond to economic incentives, but the effect of their responses on inpatient cost is relatively meagre. Our results indicate that hospitals still need to discuss guidelines for reducing hospitalisation costs and for increasing hospital activity in terms of number of patients and efficiency.

2013-01-01

371

Offshore Testing of Booms and Skimmers.  

National Technical Information Service (NTIS)

The Minerals Management Service and Conservation and Protection Agency, Environment Canada, initiated open ocean oil spill response equipment performance evaluations in 1984. The objective of this study was to develop a nonpolluting and cost-effective tes...

1987-01-01

372

Cost Comparisons  

NSDL National Science Digital Library

Students learn about the many types of expenses associated with building a bridge. Working like engineers, they estimate the cost for materials for a bridge member of varying sizes. After making calculations, they graph their results to compare how costs change depending on the use of different materials (steel vs. concrete). They conclude by creating a proposal for a city bridge design based on their findings.

Integrated Teaching And Learning Program

373

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

USGS Publications Warehouse

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.

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

1993-01-01

374

30 CFR 585.116 - Requests for information on the state of the offshore renewable energy industry.  

Code of Federal Regulations, 2012 CFR

...on the state of the offshore renewable energy industry. 585.116 Section...OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING...on the state of the offshore renewable energy industry. (a)...

2012-07-01

375

30 CFR 285.116 - Requests for information on the state of the offshore renewable energy industry.  

Code of Federal Regulations, 2011 CFR

...on the state of the offshore renewable energy industry. 285.116 Section...OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING...on the state of the offshore renewable energy industry. (a) The...

2011-07-01

376

46 CFR 126.530 - Alternative annual inspection for offshore supply vessels less than 400 gross tons in foreign ports.  

Code of Federal Regulations, 2013 CFR

...Alternative annual inspection for offshore supply vessels less than 400 gross tons in foreign ports...SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS INSPECTION AND CERTIFICATION Annual...Alternative annual inspection for offshore supply vessels less than 400 gross tons in foreign...

2013-10-01

377

76 FR 22130 - Commercial Leasing for Wind Power on the Outer Continental Shelf Offshore New Jersey-Call for...  

Federal Register 2010, 2011, 2012, 2013

...on the Outer Continental Shelf Offshore New Jersey--Call for Information and Nominations...on the Outer Continental Shelf Offshore New Jersey...Outer Continental Shelf (OCS) offshore New Jersey. Although this announcement is...

2011-04-20

378

Sanaga Sud field - Offshore Cameroon, west Africa  

SciTech Connect

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.

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

1990-09-01

379

Building the Hibernia: Newfoundland's huge offshore platform  

SciTech Connect

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).

Irving, B.

1994-10-01

380

Reducing the cost of top-drive installation  

SciTech Connect

To equip an older jackup, the Offshore Mercury, with a completely workable and reliable top drive at minimum cost and without sacrificing performance, Sonat Offshore Drilling installed a power-swivel drilling system that did not require heightening or strengthening the derrick. An electronic crown protection system was installed to allow the driller use of all available reduced crown clearance, thereby increasing drilling safety by reducing the probability of accidentally running the traveling block into the crown. In addition, they modified the DC-DC drilling power equipment to create a completely functional and low-cost alternative to installing additional AC power-generating capacity and an SCR system. When planning a cost-effective top-drive installation on the Offshore Mercury, they recognized that the rig did not fit the average jackup profile: It has a DC-DC electric power drilling system and only a 140-ft (43-m) derrick, rather than the more common SCR system and 147-ft (45-m) derrick. From costs studies made up to the middle of 1991, they believed they could save a significant amount if it were possible to install and use a top drive in a 147-ft (45-m) or even a 140-ft (43-m) derrick without having to extend and strengthen the derrick. This paper reviews the design of this system and the effectiveness of its performance.

Hock, C.J. (Sonat Offshore Drilling Inc., Houston, TX (United States))

1993-09-01

381

Structural Configuration of Mahanadi Offshore Basin, India: An Aeromagnetic Study  

NASA Astrophysics Data System (ADS)

Aeromagnetic data collected over the Offshore Mahanadi Basin along the Eastern margin of India display high amplitude magnetic anomalies. The presence of a Cretaceous volcanic sequence masks the seismic response from the underlying basement and results in poor quality seismic data. In this study spectral analysis of the aeromagnetic data collected over this part of the Offshore Mahanadi Basin was carried out. Results of this analysis indicate the presence of a high density, highvelocity (6.45 km/s) mafic layer within the crystalline basement varying from 4-6 km depth. This intra-basement layer seems to have been affected by a number of lineaments, which have played a role in the evolution of the Mahanadi Offshore Basin. The western part of the offshore basin is affected by the volcanism related to the 85°E Ridge, whereas the intense anomaly band (900 nT) offshore Puri, Konark and Paradip is interpreted as a combined effect of crystalline Precambrian basement overlain (i) by Cretaceous volcanic rocks of variable thickness (25-860 m) and (ii) by a mafic layer within the basement.

Nayak, Goutam Kumar; Rao, Ch. Rama

382

Shift work at a modern offshore drilling rig.  

PubMed

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

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

2001-12-01

383

Quantifying the hurricane risk to offshore wind turbines.  

PubMed

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

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

2012-02-28

384

Detection of wind wakes offshore from satellite SAR  

NASA Astrophysics Data System (ADS)

A study is presented on the mapping of ocean wind fields for detection of wind wakes downstream of an offshore wind farm. The study is based on ERS-2 Synthetic Aperture Radar (SAR) scenes obtained in 2003 over Horns Reef in the North Sea. A large offshore wind farm (80 wind turbines) is located 14-20 km offshore of Denmark on this submerged reef. Meteorological observations are available from an offshore mast; wind speed is measured at four heights up to 62 m and wind direction is measured at 60 m. Maps of wind speed are generated from geophysical model functions (CMOD-4, CMOD-IFR2) with a resolution of 400 m by 400 m using wind direction obtained from in-situ measurements as model input. The wind maps display zones of reduced mean wind speed downstream of the wind farm compared to upwind conditions. The reduction is approximately 10 % immediately behind the wind farm and the wake effect is vanishing over distances in the order of 10 km downstream. This is consistent with wake model predictions. Satellite SAR provides a good estimate of the propagation of wind wakes. Information on how structures affect the local wind climate is useful for wind energy purposes, particularly for siting of future offshore wind farms.

Christiansen, M. B.; Hasager, C. B.

385

Activity-based kinase profiling of approved tyrosine kinase inhibitors.  

PubMed

The specificities of nine approved tyrosine kinase inhibitors (imatinib, dasatinib, nilotinib, gefitinib, erlotinib, lapatinib, sorafenib, sunitinib, and pazopanib) were determined by activity-based kinase profiling using a large panel of human recombinant active kinases. This panel consisted of 79 tyrosine kinases, 199 serine/threonine kinases, three lipid kinases, and 29 disease-relevant mutant kinases. Many potential targets of each inhibitor were identified by kinase profiling at the K(m) for ATP. In addition, profiling at a physiological ATP concentration (1 mm) was carried out, and the IC(50) values of the inhibitors against each kinase were compared with the estimated plasma-free concentration (calculated from published pharmacokinetic parameters of plasma C(trough) and C(max) values). This analysis revealed that the approved kinase inhibitors were well optimized for their target kinases. This profiling also implicates activity at particular off-target kinases in drug side effects. Thus, large-scale kinase profiling at both K(m) and physiological ATP concentrations could be useful in characterizing the targets and off-targets of kinase inhibitors. PMID:23279183

Kitagawa, Daisuke; Yokota, Koichi; Gouda, Masaki; Narumi, Yugo; Ohmoto, Hiroshi; Nishiwaki, Eiji; Akita, Kensaku; Kirii, Yasuyuki

2013-02-01

386

You are in charge of cost.  

PubMed

Shifts in medical reimbursement dictate that physicians become knowledgeable about resource consumption. Price drives cost. The patient is now a cost center. Various models of physician-hospital integration are presented. A completely integrated staff in the hospital has the greatest potential for economic efficiency. The best method of cost accounting will include activity-based costs in a format that is understandable for physician education. Hospital cost management involves human resources, ordering practices, length of stay, purchasing, capital requirements, and benchmark targets. As health reform takes shape, physicians should be fully cognizant of cost, understand healthcare issues, and commit to improving the environment in which they practice medicine. The purpose of these activities is to improve the value of healthcare delivery for all patients. PMID:8526677

Loop, F D

1995-11-01

387

Where the offshore search for oil and gas is headed  

SciTech Connect

This overview of the world's potential offshore oil and gas frontiers points out that although solutions to technical and political problems have opened up some promising areas for exploration, many key frontier basins have yet to be explored by modern technology. Long-standing disputes between bordering countries over offshore rights have deterred exploration activities in the Malvinas basin off Argentina and in the Gulf of Venezuela. Political problems have also slowed activity in the US Atlantic offshore, where Mesozoic reef trends may be related to Mexico's large oil fields. In Canada's Labrador Sea and Grand Banks, the problems are largely operational because of the inclement weather and threatening icebergs. The thick sediments off northern Norway remain untapped due to the deep water, Arctic conditions, and boundary disputes with the USSR. The main areas of active exploration are the Gulf of Thailand-Penyu-Natuna basin in Southeast Asia and Ireland's Porcupine Bight basin.

King, R.E.

1980-10-01

388

Evidence of offshore lake trout reproduction in Lake Huron  

USGS Publications Warehouse

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.

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

2003-01-01

389

Cost Control  

ERIC Educational Resources Information Center

Education administrators involved in construction initiatives unanimously agree that when it comes to change orders, less is more. Change orders have a negative rippling effect of driving up building costs and producing expensive project delays that often interfere with school operations and schedules. Some change orders are initiated by schools…

Foreman, Phillip

2009-01-01

390

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

SciTech Connect

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.

Francois, D.K.

1993-12-31

391

33 CFR 165.1156 - Safety Zone; Offshore Marine Terminal, El Segundo, CA.  

Code of Federal Regulations, 2013 CFR

... false Safety Zone; Offshore Marine Terminal, El Segundo, CA. 165.1156 Section 165.1156 Navigation and Navigable...1156 Safety Zone; Offshore Marine Terminal, El Segundo, CA. (a) Location. The following area is a safety zone: All waters of...

2013-07-01

392

Safety and Offshore Oil: Background Papers of the Committee on Assessment of Safety of OCS Activities.  

National Technical Information Service (NTIS)

Contents: A Public Perspective of Ensuring the Adequacy of OCS Safety, An Industry Perspective on the Regulation of Oil and Gas Operations on the Outer Continental Shelf, The International Regime for Offshore Safety, Insurance in the Offshore Oil Industry...

1981-01-01

393

Federal offshore statistics: 1995 - leasing, exploration, production, and revenue as of December 31, 1995.  

National Technical Information Service (NTIS)

This report provides data on federal offshore operations for 1995. Information is included for leasing activities, development, petroleum and natural gas production, sales and royalties, revenue from federal offshore leasing, disbursement of federal reven...

R. A. Gaechter

1997-01-01

394

Offshore Tax Evasion: IRS Has Collected Billions of Dollars, but May be Missing Continued Evasion.  

National Technical Information Service (NTIS)

Tax evasion by individuals with unreported offshore financial accounts was estimated by one IRS commissioner to be several tens of billions of dollars, but no precise figure exists. IRS has operated four offshore programs since 2003 that offered incentive...

2013-01-01

395

Safety and Health in the Construction of Fixed Offshore Installations in the Petroleum Industry.  

National Technical Information Service (NTIS)

A meeting convened by the ILO (International Labor Office) on safety problems in the offshore petroleum industry recommended the preparation of a code of practice setting out standards for safety and health during the construction of fixed offshore instal...

1981-01-01

396

46 CFR 131.310 - List of crew members and offshore workers.  

Code of Federal Regulations, 2013 CFR

...false List of crew members and offshore workers. 131.310 Section 131.310 Shipping COAST GUARD, DEPARTMENT OF HOMELAND...VESSELS OPERATIONS Preparations for Emergencies § 131.310 List of crew members and offshore...

2013-10-01

397

Proceedings of the eighth international conference on offshore mechanics and Arctic engineering. 1989  

SciTech Connect

This book contains the proceedings of the Eighth International Conference on Offshore Mechanics and Arctic Engineering. Topics covered include: CAD application in offshore structure fabrication; A force control system for robotic manipulators; and intersections for trimmed surface patches.

Patrikalakis, N.M. (Massachusetts Inst. of Tech., Cambridge, MA (USA)); Chung, J.S. (Colorado School of Mines, Golden, CO (USA)); Morgan, M.J. (Industrial Systems, Woodinville, WA (US))

1989-01-01

398

75 FR 65309 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling  

Federal Register 2010, 2011, 2012, 2013

...Commission on the BP Deepwater Horizon Oil Spill and Offshore...Commission on the BP Deepwater Horizon Oil Spill and Offshore...root cause of the BP Deepwater Horizon explosion, fire...investigation into the Macondo well blowout....

2010-10-22

399

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

Federal Register 2010, 2011, 2012, 2013

...DEPARTMENT OF ENERGY National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction AGENCY: Office...12 and 13, 2010, of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, (75 FR 37783)....

2010-07-09

400

33 CFR 100.720 - Annual Suncoast Offshore Grand Prix; Gulf of Mexico, Sarasota, FL.  

Code of Federal Regulations, 2011 CFR

...2013-07-01 false Annual Suncoast Offshore Grand Prix; Gulf of Mexico, Sarasota, FL. 100.720 Section 100.720...100.720 Annual Suncoast Offshore Grand Prix; Gulf of Mexico, Sarasota, FL. (a) Regulated area. The regulated area...

2013-07-01

401

33 CFR 100.719 - Annual Suncoast Offshore Challenge; Gulf of Mexico, Sarasota, FL.  

Code of Federal Regulations, 2011 CFR

...2013-07-01 false Annual Suncoast Offshore Challenge; Gulf of Mexico, Sarasota, FL. 100.719 Section 100.719... § 100.719 Annual Suncoast Offshore Challenge; Gulf of Mexico, Sarasota, FL. (a) Regulated area. The regulated area...

2013-07-01

402

40 CFR 435.10 - Applicability; description of the offshore subcategory.  

Code of Federal Regulations, 2013 CFR

...STANDARDS (CONTINUED) OIL AND GAS EXTRACTION POINT SOURCE CATEGORY Offshore Subcategory § 435...description of the offshore subcategory...field exploration, drilling, well production...treatment in the oil and gas industry...territorial seas (âoffshoreâ) as defined...

2013-07-01

403

78 FR 34879 - Special Local Regulations for Marine Events, Atlantic City Offshore Race, Atlantic Ocean...  

Federal Register 2010, 2011, 2012, 2013

...Atlantic City Offshore Race, Atlantic Ocean; Atlantic City, NJ AGENCY...recurring marine event, held on the Atlantic Ocean, offshore of Atlantic City...vessel traffic in a portion of the Atlantic Ocean near Atlantic City, New...

2013-06-11

404

Review of technology for Arctic offshore oil and gas recovery  

SciTech Connect

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.

Sackinger, W. M.

1980-08-01

405

External costs of coastal beach pollution: an hedonic approach  

SciTech Connect

A technique for inputing a monetary value to the loss in beach recreational services that would result from a hypothetical oil spill in the Georges Bank area combines an oil-spill risk analysis model with a hedonic pricing model of the market for tourist accommodations on Cape Cod and Martha's Vineyard. The estimate of beach pollution costs associated with offshore oil development allows a rational judgment of whether the benefits of developing offshore oil outweigh the costs. The method is an effort to improve the economic efficiency of coastal zone management. The report concludes with a discussion of the many sources of uncertainty and suggestions for overcoming them. Five appendices present information on the models, variables, questionnaire responses, beaches, and factor patterns. 7 figures, 27 tables.

Wilman, E.A.

1984-01-01

406

An oceanic plateau subduction offshore Eastern Java  

NASA Astrophysics Data System (ADS)

The area offshore Java represents one of a few places globally where the early stage of subduction of an oceanic plateau is observed. We study the little investigated Roo Rise oceanic plateau on the Indian plate, subducting beneath Eurasia.Our study area is located south of eastern Java and covers the edge of the Roo Rise plateau, the Java trench and the entire forearc section. For the first time the detailed deep structure of the Roo Rise is studied, subduction of which has a significant effect on the forearc dynamics and evolution and the increase of the geohazards risks. The tsunamogenic earthquakes of 1994 and 2006 are associated with the oceanic plateau edge been subducted. We present integrated results of a refraction/wide-angle reflection tomography, gravity modeling, and multichannel reflection seismic imaging using data acquired in 2006 along a corridor centered around 113°E and composed of a 340 km long N-S profile and a 130 km long E-W oriented profile. The composite structural models reveal the previously unresolved deep geometry of the collision zone and the structure of the oceanic plateau. The crustal thickness of the Roo Rise plateau is ranging from 18 to 12 km. The structure of the upper crust of the incoming oceanic plate shows the extreme degree of fracturing in its top section, and is associated with a plate bending. The forearc Moho has a depth range from 16 to 20 km. The gravity modeling requires a sharp crustal thickness increase below Java. Within our profiles we do not recover any direct evidence for the presence of the bathymetric features on the oceanic plate currently present below the accretionary prism, responsible for the tsunamogenic earthquake triggering. However vertical variations of the forearc basement edge are observed on the trench-parallel profile, which opens a discussion on the origin of such basement undulations, together with a localized patchy uplift character of the forearc high.The complex geometry of the backstop suggests two models for the structural formation within this segment of the margin. The subducting plateau is affecting the stress field within the accretionary complex and the backstop edge, which favors the initiation of large, potentially tsunamogenic earthquakes such as the 1994 Mw=7.8 tsunamogenic event.

Shulgin, A.; Kopp, H.; Mueller, C.; Planert, L.; Lueschen, E.; Flueh, E. R.; Djajadihardja, Y.

2010-12-01

407

Offshore rig outlook may improve in 3-5 years  

SciTech Connect

Continued weakness in oil and gas prices and depressed levels of capital expenditures by oil companies have kept and real trend from developing in the supply and demand for mobile offshore drilling rigs. In fact, some forecasters around 1983 who saw substantial market improvement by the middle of this decade may have missed the future by 8 - 10 years. However, an analysis of the current supply situation for offshore rigs and the implications of dayrates from the analysis will provide some perspective of the future.

Wagner, R.D. Jr.

1989-05-01

408

Numerical Investigation into the Performance of a Rarefaction Shock Wave Cutter for Offshore Oil-Gas Platform Removal  

NASA Astrophysics Data System (ADS)

The phase change in iron at 13 GPa results in the formation of rarefaction shock waves (RSWs) upon release. The interaction of multiple RSWs induces high tensile stresses within a narrow zone, causing smooth spall. This effect can be exploited to sever cylindrical cross-section pipes, such as those supporting decommissioned offshore oil and gas platforms, using a minimal amount of explosive. Consequently, costs can be reduced and environmental impact minimized. We discuss numerical techniques used to simulate RSWs and the damage to steel resulting from the interaction of multiple RSWs.

Morris, J. P.; Glenn, L. A.; Antoun, T. H.; Lomov, I. N.

2002-07-01

409

A parametric study of an offshore concrete pile under combined loading conditions using finite element method  

Microsoft Academic Search

Offshore piles are commonly used as foundation elements of various offshore structures, especially large structures such as Tension Leg Platforms (TLP). The stress distribution within such a large structure is a dominant factor in the design procedure of an offshore pile. To provide a more accurate and effective design, a finite element model is employed herein to determine the stresses

J. A. Eicher; H. Guan; D. S. Jeng

410

Recreational behavior of onshore and offshore oil industry employees in Newfoundland, Canada  

Microsoft Academic Search

This paper discusses the results of surveys of oil industry employees in Newfoundland, Canada, working both onshore and offshore on rigs and supply boats. The surveys reveal the different recreational behavior of respondents compared to local residents, and the unique and restricted environments in which they live and work while offshore. The analysis covers the leisure time activities both offshore

Richard W. Butler; David C. Smith

1986-01-01

411

75 FR 20371 - Certificate of Alternative Compliance for the Offshore Supply Vessel LEBOUEF TIDE  

Federal Register 2010, 2011, 2012, 2013

...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...

2010-04-19

412

Proceedings of the 6th international offshore mechanics and Arctic engineering symposium, Vol. 4  

SciTech Connect

This book presents the papers given at a conference on offshore platforms. Topics considered at the conference included spray ice islands, arctic structures and operations, arctic thermal and permafrost engineering, ice properties, offshore drilling, foundations, offshore exploration, crude oil storage facilities, thermosyphons, heat transfer, concretes, wave forces, and soil mechanics.

Lunardini, V.J.; Sinha, N.K.; Wang, Y.S.; Goff, R.D.

1987-01-01

413

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 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...

2013-07-01

414

A novel method for estimating offshore wind fields using synthetic aperture radar and meteorological model data  

Microsoft Academic Search

Synthetic aperture radar (SAR) provides a promising method for offshore wind field estimation, particularly in the context of important for offshore wind farm development. This paper introduces an iterative maximum aposteriori probability (MAP) method for combining meteorological model output with synthetic aperture radar for offshore wind field estimation. The MAP approach is demonstrated for 40 ENVISAT ASAR scenes collected for

I. D. Cameron; I. H. Woodhouse; N. Walker

2007-01-01

415

75 FR 12560 - Certificate of Alternative Compliance for the Offshore Supply Vessel BUMBLE BEE  

Federal Register 2010, 2011, 2012, 2013

...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...

2010-03-16

416

AN INTERNATIONAL DESIGN STANDARD FOR OFFSHORE WIND TURBINES: IEC 61400-3  

Microsoft Academic Search

It is clear that the safety and integrity of offshore wind turbines will be considerably improved through the availability and use of relevant and reliable design standards. Although national certification rules and standards for offshore wind turbines have been published in Germany and Denmark, there is an evident need for an international standard for offshore wind turbines. This need has

D. C. Quarton

417

On the possibility of using site data for offshore wind turbine design  

Microsoft Academic Search

Over the last decade, quite a lot of offshore wind farms have sprung up all over Europe. There has been a lot of research on deciphering the offshore wind conditions to understand if they are any different from onshore conditions. However, the design of offshore turbine for the rotor nacelle assembly is still the same as that for the onshore

Ameya Sathe

2007-01-01

418

Development of LiDAR measurements for the German offshore test site  

Microsoft Academic Search

The paper introduces the content of the recently started joint research project 'Development of LiDAR measurements for the German Offshore Test Site' which has the objective to support other research projects at the German offshore test site 'alpha ventus'. The project has started before the erection of the offshore wind farm and one aim is to give recommendations concerning LiDAR

A. Rettenmeier; M. Kühn; M. Wächter; S. Rahm; H. Mellinghoff; B. Siegmeier; L. Reeder

2008-01-01

419

Project GOSAP (PP-USA.1): Gulf offshore satellite applications project  

NASA Technical Reports Server (NTRS)

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.

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

420

75 FR 17755 - Certificate of Alternative Compliance for the Offshore Supply Vessel GULF TIGER  

Federal Register 2010, 2011, 2012, 2013

...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...

2010-04-07

421

Proceedings of the 21st annual offshore technology conference. Volume 1  

SciTech Connect

This book contains the proceedings of a conference on offshore technology. Topics covered include: underwater wet welding of higher strength offshore steels; the proposed extended-reach drilling project; North Sea experience with aluminum drillpipe; and load transfer mechanism to offshore jackets during pile driving.

Not Available

1989-01-01

422

Damage-detection monitoring method for offshore platforms is field-tested  

SciTech Connect

There is a clear need to develop new methods for condition monitoring and inspection of offshore platforms. Two key reasons for this are the unreliability and the high cost of visual inspection-currently the most commonly used method. Among the inspection and monitoring methods now available, those based on vibration analysis seem to hold the greatest promise. A joint effort by two French firms has resulted in field-testing two new methods on a living quarters platform in the Arabian Gulf. This work describes the concepts, equipment, and operating procedures developed, and the significant results obtained. Full-scale experiments using vibro-detection and modal analysis, as described, have demonstrated these techniques possess considerable capability for purposes of structural integrity monitoring and potential as design aids.

Crohas, H.; Lepert, P.

1982-02-22

423

A constraint-based framework for strategic cost management  

Microsoft Academic Search

Since the 1980s, firms have searched for better ways to align their cost management systems with the realities of their business environments. The advent of accelerated global competitiveness, reduced product life cycles, rapid technological advancements, and inter-organizational supply chains have drastically increased the need for more effective approaches to cost management. In recent years, activity-based, constraint-based, and hybrid cost management

Archie Lockamy III

2003-01-01

424

Strategic Cost Reduction and Cost Revelation  

Microsoft Academic Search

Strategic cost reduction requires cost transparency. When unilateral cost revelation is feasible, strategic cost reduction indeed arises as equilibrium. If it is not feasible, however, credible revelation has to be organized, possibly by a trade association. Then, firms face a prisoners' dilemma: in Cournot duopoly, cost revelation arises as an equilibrium, but hurts firms; in Bertrand duopoly, cost concealing is

Jim Y. Jin

2001-01-01

425

Britain's R and DD takes great strides in offshore technology  

Microsoft Academic Search

The UK's fortuitous offshore oil and gas reserves have generated a considerable volume of research and development to grapple with the many problems of its extraction. This effort gives Britain a head start in gaining valuable expertise in deep-and rough-water oil production, rig, and platform technology. Within the UK, there are 3 areas of research and development and the differences

Attfield

1976-01-01

426

Offshore drilling and oil recovery: keys to half a century  

Microsoft Academic Search

Technological and structural developments in offshore drilling and oil recovery during the past 50 yr are reviewed. The earliest steps into the open sea were pier and pile-supported rigs built off the California and Louisiana coasts in the 1920s and 1930s, respectively. Jackup rigs were designed to lift the rig above storm wave level, and currently 53% of the world's

Kastrop

1979-01-01

427

Routing helicopters for crew exchanges on off-shore locations  

Microsoft Academic Search

This paper deals with a vehicle routing problem with split demands, namely the problem of determining a flight schedule for helicopters to off-shore platform locations for exchanging crew people employed on these platforms. The problem is formulated as an LP model and solved by means of a column-generation technique including solving TSP problems. Since the final solution needs to be

Gerard Sierksma; Gert A. Tijssen

1998-01-01

428

A hierarchical control architecture for mobile offshore bases  

Microsoft Academic Search

A hierarchical architecture for mobile offshore bases (MOB) control is presented. By a control architecture we mean a specific way of organizing the motion control and navigation functions performed by the MOB. It is convenient to organize the functions into hierarchical layers. This way, a complex design problem is partitioned into a number of more manageable subproblems that are addressed

Anouck Girard; J. Karl Hedrick; João Tasso de Figueiredo Borges de Sousa

2000-01-01

429

Offshore Oil Drilling: Buying Energy Independence or Buying Time?  

ERIC Educational Resources Information Center

This article addresses the issues and concerns about offshore oil drilling in the United States. The demand for energy is going up, not down, and for a long time, even as alternative sources of energy are developed, more oil will be needed. The strongest argument against drilling is that it could distract the country from the pursuit of…

Baird, Stephen L.

2008-01-01

430

Stress response of offshore structures by equivalent polynomial expansion techniques.  

National Technical Information Service (NTIS)

This paper concerns an investigation of the effects of nonlinearity of drag loading on offshore structures excited by 2D wave fields, where the nonlinear term in the Morison equation is replaced by an equivalent cubic expansion. The equivalent cubic expan...

G. Sigurdsson S. R. K. Nielsen

1990-01-01

431

Geology of the Douala basin, offshore Cameroon, West Africa  

Microsoft Academic Search

The Douala basin is predominantly an offshore basin extending from the Cameroon volcanic line in the north to the Corisco arch in the south near the Equatorial Guinea-Gabon border. The basin lies wholly within the territorial borders of Cameroon and Equatorial Guinea. The Douala basin is one of a series of divergent margin basins occurring along the southwest African coastline

R. J. Pauken; J. M. Thompson; J. R. Schumann; J. C. Cooke

1991-01-01

432

Measurement and Reduction of Offshore Wind Turbine Construction Noise  

Microsoft Academic Search

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

Externer Artikel

433

Cyclic loading of shallow offshore foundations on sand  

Microsoft Academic Search

A significant challenge currently in geotechnical engineering is the accurate modelling, both physical and theoretical, of cyclic loading. This is particularly important when considering the design of structures for the offshore environment, where much of the loading on the foundations is derived from the periodic wave action on the structure. An acc urate understanding of how the foundation performs under

B. W. Byrne; G. T. Houlsby; C. M. Martin

434

DESIGN OF MONOPILE FOUNDATIONS FOR OFFSHORE WIND ENERGY PLANTS  

Microsoft Academic Search

The foundation of offshore wind energy plants plays an important role in the stability of these structures. One foundation concept which can be used in this field is the monopile concept. Here the foundation consists of one large-diameter pile (up to 8.0 m). Common design practice, e. g. according to API regulations, does not cover horizontally loaded piles of such

MARTIN ACHMUS; KHALID ABDEL-RAHMAN

435

Development Potential for California's Offshore Wind Energy Resource  

NASA Astrophysics Data System (ADS)

An initial analysis was performed for areas suitable for offshore wind farm development near the California coast. The siting of an offshore wind farm is limited by water depth, with shallow water being the most preferable economically. Acceptable depths for offshore wind farms were broken up into three categories, based on current and future wind turbine tower support technology; ?20 meters depth for monopile towers, ?50 meters for water jacket tripods/quadrapods, and ? 200 meters depth for deep water floating tower technology which is likely to be developed in the next 15 years. Using the Penn State/National Center for Atmospheric Research Mesoscale Model version 5 (MM5) to predict winds aloft at high resolution (1.67 and 5 km) near the locations of interest, annual 80 meter wind speeds were found for each area. Annual 80 meter wind speeds were based on the average of January, April, July, and Octobers' 2005/2006 MM5 model data. The interannual variation is also examined. Floating buoys were used to validate the surface level winds off the California coast. Using the REpower 5M 5.0 MW, 126 meter diameter offshore wind turbine, a preliminary overall resource assessment was made for coastal California. Initial estimates show that 2-10 TWh, 9-27 TWh, and 67-293 TWh of energy could be harnessed annually using monopile, state of the art, and future turbine support technology in Northern California, the Bay Area, and Southern California respectively.

Dvorak, M. J.; Jacobson, M. Z.; Archer, C. L.

2007-12-01

436

Control and Design of DC Grids for Offshore Wind Farms  

Microsoft Academic Search

Recently, the interest in offshore wind farms has been increased significantly. Besides the huge amount of space available, they have the advantage of an increased and more constant wind speed, leading to a higher and more constant production of power. Although, a lot of mechanical problems for constructing these farms have been solved during the past decade, the electrification is

Christoph Meyer; Markus Hoing; Anders Peterson; Rik W. De Doncker

2007-01-01

437

Worker Health and Safety on Offshore Wind Farms.  

National Technical Information Service (NTIS)

In April 2011, the Bureau of Ocean Energy Management, Regulation, and Enforcement (BOEMRE) had just received the results of a study by the Marine Board of the National Research Council (NRC) focusing on the structural safety of offshore wind turbines (see...

2013-01-01

438

Implementation of offshore wind farm & The challenges related to it  

Microsoft Academic Search

Wind is the fastest growing renewable energy source. The vast majority of wind power is generated from onshore wind farms. Their growth is however limited by the lack of inexpensive land near major population centers and the visual pollution caused by large wind turbines. Wind energy generated from offshore wind farms is the next frontier. In this paper we suggested

Zamshed Iqbal Chowdhury; M. Shahiduzzaman

2009-01-01

439

Transnational Higher Education: Offshore Campuses in the Middle East  

ERIC Educational Resources Information Center

This paper maps the landscape of transnational higher education in the Middle East, focusing in particular on the recent expansion of satellite, branch, and offshore educational institutions and programs that foreign institutions have set up in the region. Of the estimated 100 branch campuses currently operating worldwide, over one-third are in…

Miller-Idriss, Cynthia; Hanauer, Elizabeth

2011-01-01

440

Onshore-offshore coastal lithofacies of Polis basin, NW Cyprus  

SciTech Connect

The Polis basin, northwest Cyprus, is located between the Akamas Peninsula and the main Troodos ophiolite massif. The basin contains sediments of Miocene-Holocene age and allows detailed study of a range of onshore-offshore coastal lithofacies which represent potential reservoirs. Coastal sediments of Messinian age characterized by algal mats and fluvial channel fill are found in the basin. Following very late Miocene rifting and Pliocene transgression, steep, narrow, faulted coastlines were produced, and several coastal facies were generated. These include coastal alluvial fans, offshore reefs, and tectonically generated cliff deposits as olistolith blocks. The steep, faulted coastline generated fan-delta deposits in early Pliocene time, superseded during late Pliocene regression by carbonate fan deltas. Offshore coastal lithofacies include storm-generated deposits, consisting of rip-up clasts and hummocky cross-stratification in sand-silt sequences, and mass-flow and channelized conglomerates and debris flows in this tectonically active basin. Shoreline sands are dominated by long-shore drift which generated longitudinal sandbars and offshore gravel bars. Pleistocene-age deposits show several suites of coastal deposits, formed in response to oscillations in Pleistocene sea level. These include beach deposits demonstrating beach-crest and planar bimodal back-beach deposits, together with coastal lagoons transected by cross-bedded fluvial conglomerate deposits. In addition, lowstands produced large channelized braided fluvial deposits which formed part of a broad coastal plain. Certain Pleistocene channels are deformed by continuing synsedimentary tectonic activity.

Ward, L.C. (Univ. of Edinburgh (Scotland))

1988-08-01

441

The maturation of the Russian offshore software industry  

Microsoft Academic Search

In the decade of the 1990s, India leapt ahead of all other competitors for offshore programming business, giving the impression that Russia had not lived up to its potential. This paper uses case studies of firms and clients and available literature to investigate what Russia has achieved so far, what bottlenecks and hindrances have prevented it from going further, and

Stephen Hawk; William McHenry

2005-01-01

442

RCS and radar propagation near offshore wind farms  

Microsoft Academic Search

The wind farm impact on marine radars has not been widely reported. Some past publications have touched on the subject but there has been no accurate model in place to readily examine the effects of different farm geometries, tower shapes and turbine sizes. This paper discusses the radar propagation modeling near offshore wind farms including the methods used to model

Laith S Rashid; Anthony K Brown

2007-01-01

443

Current automation environment of PETROBRAS offshore production units.  

National Technical Information Service (NTIS)

This paper aims to show the evolution of automation in PETROBRAS' off-shore production units during the last decade. It also displays the currently used standard architecture, describing the main aspects of each sub-system which is part of the entire auto...

C. H. W. Moura F. M. R. Mendes J. A. P. Silva Filho P. Loureiro

1996-01-01

444

Offshore finfish mariculture in the Strait of Juan de Fuca  

SciTech Connect

Finfish mariculture has existed in the U.S. Pacific Northwest for over thirty years, but for the past 15 years most effort has focused on culture of Atlantic salmon in protected, inshore cage sites. The Strait of Juan de Fuca (the "Strait") is a large area with relatively sparce shoreline development and several apparent advantages for mariculture using offshore technology.

Rensel, Jack; Kiefer, Dale; Forster, John R.; Woodruff, Dana L.; Evans, Nathan R.

2007-10-07

445

Software Development Offshoring Competitiveness: A Case Study of ASEAN Countries  

ERIC Educational Resources Information Center

With the success of offshoring within the American software industry, corporate executives are moving their software developments overseas. The member countries of the Association of Southeast Asian Nations (ASEAN) have become a preferred destination. However, there is a lack of published studies on the region's software competitiveness in…

Bui, Minh Q.

2011-01-01

446

78 FR 63233 - National Offshore Safety Advisory Committee; Meeting  

Federal Register 2010, 2011, 2012, 2013

...in the DNV Conference space. The November 14th full...in the DNV Conference space. When arriving, please...directions to the Conference space. For information on...or in support of the exploration of offshore mineral and...Voluntary Standards on the Outer Continental...

2013-10-23

447

Nitrogen cycling in the offshore waters of the Black Sea  

Microsoft Academic Search

The purpose of this study was to measure directly the rates of several of the processes responsible for the production and utilization of nitrogenous nutrients, and to use these rates and other data to generate an annual nitrogen budget for the Black Sea. Water column samples and experimentation with 15N labeled nutrients in the offshore waters of the Black Sea

James J. McCarthy; Aysen Yilmaz; Yesim Coban-Yildiz; John L. Nevins

2007-01-01

448

Concept for Improved Crane Performance in Offshore Operations.  

National Technical Information Service (NTIS)

The joint Army/Navy Marine Corps Off-Shore Discharge of containership I and II (OSDOC I and II) Test/Evaluation exercises were conducted in 1970 and 1972, respectively, in order to explore through test and evaluation various techniques for unloading conta...

D. Dillon L. Bonde

1976-01-01

449

Constrained non-linear waves for offshore wind turbine design  

Microsoft Academic Search

Advancements have been made in the modelling of extreme wave loading in the offshore environment. We give an overview of wave models used at present, and their relative merits. We describe a method for embedding existing non-linear solutions for large, regular wave kinematics into linear, irregular seas. Although similar methods have been used before, the new technique is shown to

P J Rainey; T R Camp

2007-01-01

450

Optimizing the NW off-shore wind turbine design  

Microsoft Academic Search

This paper provides a solution to address one of the requirements identified in the US Northwest 6th Power Plan, specifically, meeting an increase in the forecasted Pacific Northwest demand with renewable generation. A model is presented which evaluates one source of renewable generation, off-shore wind energy. The model analyzes different wind turbine design characteristics, assigns significance to potential synergistic effects

Tugrul U. Daim; Elvan Bayraktaroglu; Judith Estep; Dong Joon Lim; Jubin Upadhyay; Jiting Yang

451

Spud bushing system for mobile offshore arctic drilling structure  

Microsoft Academic Search

In a mobile offshore structure, a spud bushing system is described for transmission of lateral loads between the structure and a spud penetrated into the sea floor while permitting relative vertical movement between the structure and spud. The system consists of: a bushing seat fixed in the structure; a bushing operative when seated in the bushing seat to support laterally

R. A. Jr. Scharnell; R. F. Mast

1986-01-01

452

SIMULATION OF OFFSHORE WIND TURBINE RESPONSE FOR EXTREME LIMIT STATES  

Microsoft Academic Search

When interest is in estimating long-term design loads for an offshore wind turbine using simulation, statistical extrapolation is the method of choice. While the method itself is rather well-established, simulation effort can be intractable if uncertainty in predicted extreme loads and efficiency in the selected extrapolation procedure are not specifically addressed. Our aim in this study is to address these

P. Agarwal; L. Manuel

2007-01-01

453

Economic geology of offshore gas hydrate accumulations and provinces  

Microsoft Academic Search

The economic potential of well-studied offshore gas hydrate accumulations and provinces is assessed qualitatively based on consideration of geological, technological, and economic factors. Three types of gas hydrate accumulations are suggested. Structural accumulations occur where thermogenic, bacterial, or mixed gases are rapidly transported from the subsurface petroleum system to the gas hydrate stability zone along faults, mud volcanoes, and other

Alexei V Milkov; Roger Sassen

2002-01-01

454

Application of Resilience Engineering on Safety in Offshore Helicopter Transportation  

Microsoft Academic Search

This paper is the result of a cognitive analysis performed on a helicopter system that provides transportation for a large petrochemical company in Brazil. This complex system was designed to be the link between the onshore base and the petroleum drillers located on offshore platforms. By analyzing the factors within the complex socio-technical system and focusing on the concepts of

T. F. da Mata; D. W. Gajewski; C. K. Hall; M. C. Lacerda; A. G. Santos; J. O. Gomes; D. D. Woods

2006-01-01

455

Higher Skills and the Knowledge Economy: The Challenge of Offshoring  

ERIC Educational Resources Information Center

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…

Craig, John; Gunn, Andrew

2010-01-01

456

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

457

Constraints on offshore exploratory operations imposed by California environmental regulations  

SciTech Connect

Increasing levels of environmentally-based regulations have introduced significant constraints to exploratory operations conducted in California waters. Specific regulations are intended to protect the coastal environment in the areas of air quality, water quality, fishing and marine resources, and aesthetics. These regulations can affect the method, location, timing and expense of offshore operations, both in monetary terms and in terms of operating restrictions.

Pickford, K.H.

1984-09-01

458

Comparison of Wake Models with Data for Offshore Windfarms  

Microsoft Academic Search

A m ajor objective of the ENDOW project is to evaluate the perform ance of wake m odels in offshore windfarm environments in order to ascertain the im provem ents required to enhance the prediction of power output within large of fshore wind farms (1). The strategy for achieving this is to compare the performance of the models in a

K. Rados; G. Larsen; R. Barthelmie; W. Schlez; B. Lange; G. Schepers; T. Hegberg; M. Magnisson

2001-01-01

459

High Tip Speed Operation for Offshore Wind Turbines  

Microsoft Academic Search

Summary The operation of large offshore wind turbines at high rotational speeds is investigated with focus on rotor aerodynamics, performance for the extended operational range and the potential for tower top mass reductions. 2D aerodynamic investigations were carried out with the program XFOIL on the NACA 63415 airfoil. Several 5 MW wind turbine rotors were designed to operate at tip

Andreas Knauer; Tor David Hanson

460

ART-based multiple neural networks for monitoring offshore platforms  

Microsoft Academic Search

A novel scheme using artificial neural networks to automate the vibration monitoring method of detecting the occurrence and location of damage in offshore jacket platforms is presented. A multiple neural network system is adopted which enables the problem to be decomposed into smaller ones, facilitating easier solution. An adaptive resonance theory (ART) neural network is used for damage diagnosis and

Lalu Mangal; V. G. Idichandy; C. Ganapathy

1996-01-01

461

Critical issues in large offshore wind farm design and operation  

Microsoft Academic Search

Interest in the realization of offshore wind farms is growing even in zones where exploitation was considered unprofitable so far. For this reason, studies are needed in order to design suitable methodologies aiming to investigate economic feasibility and control strategies both in steady-state and dynamic conditions. In this work, the analysis of steady-state behaviour and investment concerns of electric system

M. Dicorato; G. Forte; P. Pugliese; M. Trovato; F. Pallotti

2009-01-01

462

Redundancy analysis of offshore wind farm collection and transmission systems  

Microsoft Academic Search

This paper discusses the redundancy issues of the collection and transmission systems of large-scale offshore wind farms. Firstly addresses the importance of wind farm reliability study; then from the analysis of existing wind farm design researches, quantitively defines the redundancy degree of wind farm collection and transmission system. After analysing the wind farm geographic features, proposes a systematic wind farm

Jin Yang; John O'Reilly; John E. Fletcher

2009-01-01

463

A floating platform of concrete for offshore wind turbine  

Microsoft Academic Search

A floating platform concept is introduced in this paper for offshore wind turbine. A vertical cylinder on the top of an elliptical sphere forms the principal configuration of the platform. The analysis of the dynamic performance of an example platform with 5 MW wind turbine by means of the well-established linear theory for the dynamics of marine constructions in waves

Jianbo Hua

2011-01-01

464

Offshore waste management - discharge, inject, or haul to shore?  

Microsoft Academic Search

Offshore oil and gas operations generate a variety of solid and liquid wastes. Some of these wastes are attributable to exploration and production (E&P) activities (drilling wastes, produced water, treatment and workover fluids), while others are due to either human presence (sanitary wastes, food wastes) or generic industrial operations (wastepaper, scrap metal, used paints and solvents). This paper focuses on

John A. Veil

2001-01-01

465

Underwater Inspection/Testing/Monitoring of Offshore Structures.  

National Technical Information Service (NTIS)

Requirements for underwater inspection of offshore structures and the techniques and tools to conduct such inspection vary widely from country-to country. The purpose of this six month study was: (1) to identify and describe all actual or potential underw...

1978-01-01

466

Stress and accidents in the offshore oil and gas industry  

Microsoft Academic Search

This book is a comprehensive analysis of occupational stress and accidents among personnel working in the European offshore oil and gas industry. Identifies sources of stress and predicts stressor outcomes. Examines job dissatisfaction, mental well-being and their relation to accidents. Also explores the differences within occupational status (operator versus contractor) and type of installation (drilling rigs versus fixed production platforms).

V. J. Sutherland; C. L. Cooper

1991-01-01

467

Deepwater Advanced Diving Systems That Support the Offshore Oil Field  

Microsoft Academic Search

This paper reviews deepwater diving technology which provides offshore oilfield support during all phases of exploration, construction and production. Mobile Observation Bells (MOB), Atmospheric Diving Suits (ADS), Remotely-Operated Vehicles (ROV), and saturation diving techniques are discussed. The term ''deep water'' is defined in relation to the water depths off the U.S. west coast. All diving system parameters are analyzed for

S. J. Carnevale

1983-01-01

468

Offshore oil & gas: Deep waters dominate in 1997  

Microsoft Academic Search

Deep water exploration and field development dominate the energy market as 1997 begins. All indicators point that a turnaround in the oil and gas industry is in full swing. Strong market fundamentals are in place: the worldwide offshore mobile rig fleet is approaching full utilization of marketed rigs, which has tightened the supply\\/demand balance and boosted day rates for all

1997-01-01

469

OFFSHORE OIL AND GAS EXTRACTION - AN ENVIRONMENTAL REVIEW  

EPA Science Inventory

Reported are the results of an environmental review of emission sources and emissions associated with U.S. offshore oil and gas exploration, drilling, and production. In the information reviewed, greatest environmental concern was with accidental spills of oil that can occur duri...

470

The security dimension of China’s offshore oil development  

Microsoft Academic Search

On February 15 and March 15, 1982, the People's Republic of China opened the first round of bidding on some 150,000 square kilometers of offshore oil exploration contract areas in the South China Sea and Yellow Sea. Of the 46 foreign oil companies that had participated in broad seismic surveys of the Chinese continental shelf in 1980, 35 indicated intent

Kim Woodard; Alice A. Davenport

1982-01-01

471

Operators, service companies improve horizontal drilling accuracy offshore  

SciTech Connect

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.

Lyle, D.

1996-04-01

472

Portable life support for instrumentation of an offshore platform  

NASA Technical Reports Server (NTRS)

A compressor was used to supply air through a nylon hose to the offshore platform field engineer working at the bottom of the piling. Air quality in the pile was sampled periodically for carbon dioxide, carbon monoxide, hydrogen sulfide, and combustible gases by an universal tester and an explosion meter.

Mull, M. M.; Coffin, C. L.

1972-01-01

473

A drilling model for young offshore Louisiana and Texas trends  

SciTech Connect

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.

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

1988-06-01

474

Assessment of Offshore Wind Energy Potential in the United States (Poster)  

SciTech Connect

The development of an offshore wind resource database is one of the first steps necessary to understand the magnitude of the resource and to plan the distribution and development of future offshore wind power facilities. The U.S. Department of Energy supported the production of offshore wind resource maps and potential estimates for much of the United States. This presentation discusses NREL's 2010 offshore wind resources report; current U.S., regional, and state offshore maps; methodology for the wind mapping and validation; wind potential estimates; the Geographic Information Systems database; and future work and conclusions.

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

2011-05-01

475

Ice mechanics and risks to offshore structures  

SciTech Connect

This volume brings together the results of all salient research development in ice engineering, from smaller scale to full size tests on ice strength and ice mechanics which is essential criteria for the design of safe, cost effective structures. Much of the data has been released from confidential industry files and thus allows, for the first time, a full appraisal of the subject. Contents include - Types and Distribution of Ice, Mechanical Properties, Measurements of Ice-Structure Interaction, and Analysis of Ice Failure and Design Ice Loads. This work is completed with a full literary review and subject index.

Sanderson, T.J.O.

1988-01-01

476

Activity-based mission planning and plan management for autonomous vehicles  

Microsoft Academic Search

This paper presents an activity-based mission planning and plan management framework that has been developed at the Charles Stark Draper Laboratory. The main contributions of this paper are definition of this activity-based implementation and comparison with other planning implementation approaches (e.g., behavior-based); and explanation of how planning, execution, monitoring, and replanning are implemented within this activity-based approach. One of the

W. D. Hall; J. A. Farrell

1994-01-01

477

Effects of sea state on offshore wind resourcing in Florida  

NASA Astrophysics Data System (ADS)

Offshore resource assessment relies on estimating wind speeds at turbine hub height using observations typically made at substantially lower height. The methods used to adjust from observed wind speeds to hub height can impact resource estimation. The importance of directional sea state is examined, both as seasonal averages and as a function of the diurnal cycle. A General Electric 3.6 MW offshore turbine is used as a model for a power production. Including sea state increases or decreases seasonally averaged power production by roughly 1%, which is found to be an economically significant change. These changes occur because the sea state modifies the wind shear (vector wind difference between the buoy height and the moving surface) and therefore the extrapolation from the observation to hub height is affected. These seemingly small differences in capacity can alter profits by millions of dollars depending upon the size of the farm and fluctuations in price per kWh throughout the year. A 2% change in capacity factor can lead to a 10 million dollar difference from total kWh produced from a wind farm of 100 3.6MW turbines. These economic impacts can be a deciding factor in determining whether a resource is viable for development. Modification of power output due to sea states are shown for seasonal and diurnal time scales. Three regions are examined herein: West Florida, East Florida, and Nantucket Sound. The average capacity after sea state is included suggests areas around Florida could provide substantial amounts of wind power throughout three-fourths of the calendar year. At certain times of day winter average produced capacity factors in West Florida can be up to 45% more than in summer when sea state is included. Nantucket Sound capacity factors are calculated for comparison to a region near a planned United States offshore wind farm. This study provides evidence to suggest including sea state in offshore wind resource assessment causes economically significant differences for offshore wind power siting.

Collier, Cristina

478

New ultra-deepwater rig with dual rotaries will reduce costs  

Microsoft Academic Search

The Discoverer Enterprise, a next generation, ultra-deepwater drill ship with a dual rotary system, will decrease drilling and completion costs by reducing bottom hole assembly (BHA) and tubular preparation time. Transocean Offshore received a contract from Amoco Corp. to build the ultra-deep floating rig and is scheduled to spud its first well in July 1998. It will generally work in

J. C. Cole; R. P. Herrmann; R. J. Scott; J. M. Shaughnessy

1997-01-01

479

Offshore underbalanced drilling system could revive field developments. Part 2: Making this valuable reservoir drilling/completion technique work on a conventional offshore drilling platform  

SciTech Connect

Part 1, presented in the July issue, discussed the emerging trend to move underbalanced drilling (UBD) operations into the offshore arena, following its successful application in many onshore areas. This concluding article delves into the details of applying UBD offshore. Starting with advantages the technique offers in many maturing or complex/marginal prospects, the UBD system for offshore platforms use is described. This involves conversion of the conventional rotary system, use of rotating diverters, design of the surface fluid separation system and the necessary gas (nitrogen or natural gas) injection system to lighten the fluid column. Commonly faced operational challenges for offshore UBD are listed along with recommended solutions.

Nessa, D.O.; Tangedahl, M.J.; Saponja, J.

1997-10-01

480

Enhancing Offshore Oil Operations with Cost-Effective and Innovative Telecommunication Solutions  

Microsoft Academic Search

Crude oil constitutes a large percentage of the Nigerian economy. The activities associated with crude oil production involve exploration, drilling, and transportation. Of these activities drilling is known to be the most arduous and expensive venture. The drilling sites are often remote, harsh, hostile, oppressive areas and lack necessary communication infrastructure. The terrestrial infrastructure in Nigeria is often insufficient, antiquated,

S. O. Ajose; I. I. Ezebuiro

481

Treatment and recycling system optimisation with activity-based costing in WEEE reverse logistics management: an environmental supply chain perspective  

Microsoft Academic Search

Waste electrical and electronic equipment (WEEE) reverse logistics management has increasingly received much attention in recent years not only because of the fast increase of WEEE but also the legislations in many developed countries. This paper focuses on the treatment and recycling system, and proposes a two-stage multi-objective decision framework. In the treatment stage, the responsible producer selects treatment suppliers

W.-H. Tsai; Shih-Jieh Hung

2009-01-01

482

Tubal sterilization by laparoscopy or hysteroscopy: which is the most cost-effective procedure?  

PubMed

By using the activity-based cost/management (ABC/M) system we computed and compared costs needed for laparoscopic tubal sterilization (LTS) and Essure hysteroscopic tubal occlusion (EHTO). We found that total health costs related to consultation and presurgery did not differ between LTS and EHTO; EHTO has low recovery unit costs but is more costly for the operating theater, mainly due to Essure microinserts. PMID:18930457

Franchini, Mario; Cianferoni, Luciano; Lippi, Giuseppe; Calonaci, Francesco; Calzolari, Stefano; Mazzini, Massimo; Florio, Pasquale

2009-04-01

483

Tephrochronology offshore Ischia Island, Tyrrhenian sea, Italy  

NASA Astrophysics Data System (ADS)

This work presents the analytical results of a tephrochronological study carried out on 12 gravity cores collected offshore southern Ischia island down to a maximum depth of 1238 m. The more distal site (core C1071) is located few kilometers to the west of the "Banco delle Sirene" seamount, not far from the Magnaghi and Dohrn canyons. The composite succession records at least the last ca. 40 kyrs of marine sedimentation as deduced by 14C AMS dating and tephrostratigraphy. This is consistent with the attribution, on the basis of the calcareous nannofossil assemblages, to the Emiliania huxleyi Acme Zone (Rio et al., 1990) in the latest Pleistocene-Holocene time interval. Eight primary tephra layers were recognised and analysed. They are generally represented by coarse to fine ash alternating with a number of volcaniclastic turbidites along the whole succession. The glass fraction was geochemically characterised through SEM-EDS analyses and shows clear affinities with products erupted during significant explosive events occurred in the Campania Plain, Ischia and Procida islands during the last 40 kyrs. Four ash layers were correlated with several eruptions occurred on Ischia island between the Middle Ages and Roman times and at ~ cal. 17 ka B.P. Deposits related to explosive activity occurred on Procida island were also found and dated at ~23 cal ka. Among the most ancient tephra layers, the best preserved horizon, 30 cm thick, is represented by the flegrean products of the Campanian Ignimbrite event (39 ka; De Vivo et al., 2001) the marine signature of which is known as C13 tephra in the Tyrrhenian (Thon-That et al., 2001). The peculiar composition and stratigraphic position of two other main marker tephras recognised in the succession, allowed us to correlate them with the still poorly known Schiava (36 ka B.P.; Paterne and Guichard, 1993; Sulpizio et al., 2003) and Codola (~33. cal ka B.P.; this work) fall-out products which occur as 7-5 cm-thick pumice layers at the coring site. The definition of the source area of these two major events is still a matter of debate. However, the Somma-Vesuvius complex reasonably sourced the Schiava deposits while a Campi Flegrei provenance for the Codola deposits cannot be ruled out (Di Vito et al., 2008). These latters, known as C10 tephra in the Tyrrhenian and Adriatic sea (Paterne et al., 1988; Giaccio et al., 2008), in particular, represent reliable regional markers for the whole central Mediterranean area. References De Vivo, B., Rolandi, G., Gans, P.B., Calvert, A., Bohrson,W.A., Spera, F.J., Belkin, H.E., 2001. New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy). Mineralogy and Petrology 73, 47-65. Di Vito,M.A., Sulpizio, R., Zanchetta, G., D'Orazio, M., 2008. The late Pleistocene pyroclastic deposits of the Campanian Plain: newinsights into the explosive activity of Neapolitan volcanoes. J. Volcanol. Geotherm. Res.177, 19-48. Giaccio, B., Isaia, R., Fedele, F.G., Di Canzio, E., Hoffecker, J., Ronchitelli, A., Sinitsyn, A., Anikovich, M., Lisitsyn, S.N., 2008. The Campanian Ignimbrite and Codola tephra layers: two temporal/stratigraphic markers for the Early Upper Palaeloithic in southern Italy and eastern Europe. J. Volcanol. Geotherm. Res. 177, 210-228. Paterne M., Guichard F. & Labeyrie J., 1988. Explosive activity of the south Italian volcanoes during the past 80.000 years as determined by marine tephrochronology. J. Volcanol. Geother. Res. 34, 153-172. Paterne, M., Guichard, F., 1993. Triggering of volcanic pluses in the Campanian area, south Italy, by periodic deep magma in.ux. Journal of Geophysical Research 98 (B2), 1861-1873. Rio, D., Raffi, I., Villa, G., 1990. Pliocene-Pleistocene calcareous nannofossil distribution patterns in the western Mediterranean. In: Kastens, K.A. (Ed.), Proceedings of the Ocean Drilling Program. Scientific Results, vol. 107. Ocean Drilling Program, College Station, TX, pp. 513-533. Sulpizio, R., Zanchetta, G., Paterne, M., Siani, G., 2003. A review of tephrostratigraphy in central and south

Insinga, Donatella; Sulpizio, Roberto; de Alteriis, Giovanni; Morabito, Simona; Morra, Vincenzo; Sprovieri, Mario; di Benedetto, Claudia; Lubritto, Carmine; Zanchetta, Giovanni

2010-05-01

484

Understanding Arctic drilling economics will help cut costs  

SciTech Connect

Despite advancements in technology, the North Slope and Beaufort Sea area of Alaska remains one of the most costly and harshest drilling environments in the world. In this article, the author presents an overview of economic concerns and drilling considerations that prevail on the Slope today. Specifically discussed are permits, well location and logistics information, well planning suggestions and ideas on rig selection. Also included are descriptive time table charts and an in-depth breakdown of projected well costs for both onshore and offshore applications.

Vickery, R.B.

1983-03-01

485

Quantifying the Hurricane Risk to Offshore Wind Power (Invited)  

NASA Astrophysics Data System (ADS)

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. Whether that risk will grow as a result of climate change is uncertain. Recent years have seen an increase in hurricane activity in the Atlantic basin (1) and, all else being equal, warmer sea surface temperatures can be expected to lead to increased storm intensity. We have developed a method to estimate the catastrophe risk to offshore wind power using simulated hurricanes (2). In Texas, the most vulnerable region we studied, 10% of offshore wind power could be offline simultaneously due to hurricane damage with a 100-year return period and 6% could be destroyed in any 10-year period. 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. 1. Iris Grossmann and M. Granger Morgan, "Tropical Cyclones, Climate Change, and Scientific Uncertainty: What do we know, what does it mean, and what should be done?," Climatic Change, 108, pp 543-579, 2011. 2. Carnegie Mellon Electricity Industry Center Working Paper CEIC-13-07, http://wpweb2.tepper.cmu.edu/electricity/papers/ceic-13-07.asp This work was supported in part by the EPA STAR fellowship program, a grant from the Alfred P. Sloan Foundation and EPRI to the Carnegie Mellon Electricity Industry Center, and by the Doris Duke Charitable Foundation, the R.K. Mellon Foundation and the Heinz Endowments for support of the RenewElec program at Carnegie Mellon University. This research was also supported in part by the Climate and Energy Decision Making (CEDM) center created through a cooperative agreement between the National Science Foundation (SES-0949710) and Carnegie Mellon University.

Apt, J.; Rose, S.; Jaramillo, P.; Small, M.

2013-12-01

486

Securing Access to Lower-cost Talent Globally: The Dynamics of Active Embedding and Field Structuration  

Microsoft Academic Search

Manning S., Sydow J. and Windeler A. Securing access to lower-cost talent globally: the dynamics of active embedding and field structuration, Regional Studies. This article examines how multinational corporations shape institutional conditions in emerging economies to secure access to high-skilled, yet lower-cost science and engineering talent. Two in-depth case studies of engineering offshoring projects of German automotive suppliers in Romania

Stephan Manning; Jörg Sydow; Arnold Windeler

2011-01-01

487

Efficiency and effectiveness of wind farms—keys to cost optimized operation and maintenance  

Microsoft Academic Search

Operation and maintenance (O&M) cost will be the key to the economic viability of large offshore wind farms planned worldwide. In order to support investment decisions a systematic mathematical approach to the O&M cost contributions is required prior to detailed engineering or even construction of the wind farm.Adopting the general terms of efficiency, productivity and effectiveness defined for production processes

H.-J. Krokoszinski

2003-01-01

488

Activity Based Learning in a Freshman Global Business Course: Analyses of Preferences and Demographic Differences  

ERIC Educational Resources Information Center

The present study investigates pre-business students' reaction to Activity Based Learning in a lower division core required course entitled Introduction to Global Business in the business curriculum at California State University Chico. The study investigates students' preference for Activity Based Learning in comparison to a more traditional…

Levine, Mark F.; Guy, Paul W.

2007-01-01

489

Detection and monitoring of offshore oil seeps using ERS\\/ENVISAT SAR\\/ASAR data and seep-seismic studies in Krishna-Godavari offshore basin, India  

Microsoft Academic Search

An attempt has been made to use SAR data for detection and monitoring of offshore oil seeps in the eastern offshore areas of the Krishna-Godavari Basin, which has been supplemented and correlated with collateral free-air gravity and seismic data. Images of the study area obtained from ENVISAT ASAR Image Mode (IM) were processed and analyzed in detail. A number of

Durga Shanker Mitra; Tapan Jyoti Majumdar; Ratheesh Ramakrishnan; Harshvardhan Dave; Subhobroto Mazumder

2012-01-01

490

Cost and performance analysis of physical security systems  

SciTech Connect

CPA - Cost and Performance Analysis - is a prototype integration of existing PC-based cost and performance analysis tools: ACEIT (Automated Cost Estimating Integrated Tools) and ASSESS (Analytic System and Software for Evaluating Safeguards and Security). ACE is an existing DOD PC-based tool that supports cost analysis over the full life cycle of a system; that is, the cost to procure, operate, maintain and retire the system and all of its components. ASSESS is an existing DOE PC-based tool for analysis of performance of physical protection systems. Through CPA, the cost and performance data are collected into Excel workbooks, making the data readily available to analysts and decision makers in both tabular and graphical formats and at both the system and subsystem levels. The structure of the cost spreadsheets incorporates an activity-based approach to cost estimation. Activity-based costing (ABC) is an accounting philosophy used by industry to trace direct and indirect costs to the products or services of a business unit. By tracing costs through security sensors and procedures and then mapping the contributions of the various sensors and procedures to system effectiveness, the CPA architecture can provide security managers with information critical for both operational and strategic decisions. The architecture, features and applications of the CPA prototype are presented. 5 refs., 3 figs.

Hicks, M.J. [Sandia National Lab., Albuquerque, NM (United States); Yates, D.; Jago, W.H. [Tecolote Research, Inc., Santa Barbara, CA (United States)] [and others

1997-06-01

491

Landmark Report Analyzes Current State of U.S. Offshore Wind Industry (Fact Sheet)  

SciTech Connect

New report assesses offshore wind industry, offshore wind resource, technology challenges, economics, permitting procedures, and potential risks and benefits. The National Renewable Energy Laboratory (NREL) recently published a new report that analyzes the current state of the offshore wind energy industry, Large-Scale Offshore Wind Power in the United States. It provides a broad understanding of the offshore wind resource, and details the associated technology challenges, economics, permitting procedures, and potential risks and benefits of developing this clean, domestic, renewable resource. The United States possesses large and accessible offshore wind energy resources. The availability of these strong offshore winds close to major U.S. coastal cities significantly reduces power transmission issues. The report estimates that U.S. offshore winds have a gross potential generating capacity four times greater than the nation's present electric capacity. According to the report, developing the offshore wind resource along U.S. coastlines and in the Great Lakes would help the nation: (1) Achieve 20% of its electricity from wind by 2030 - Offshore wind could supply 54 gigawatts of wind capacity to the nation's electrical grid, increasing energy security, reducing air and water pollution, and stimulating the domestic economy. (2) Provide clean power to its coastal demand centers - Wind power emits no carbon dioxide (CO2) and there are plentiful winds off the coasts of 26 states. (3) Revitalize its manufacturing sector - Building 54 GW of offshore wind energy facilities would generate an estimated $200 billion in new economic activity, and create more than 43,000 permanent, well-paid technical jobs in manufacturing, construction, engineering, operations and maintenance. NREL's report concludes that the development of the nation's offshore wind resources can provide many potential benefits, and with effective research, policies, and commitment, offshore wind energy can play a vital role in future U.S. energy markets.

Not Available

2011-09-01

492

Project of a Near-Real-Time Sismo-acoustic Submarine Station for offshore monitoring (NRTSSS)  

NASA Astrophysics Data System (ADS)

The INGV seismic network ensures reliable and continuous monitoring of the Italian territory. However, the peculiarity of the Italian peninsula, characterised by an intense offshore geodynamic and seismic activity, requires the extension of the seismic monitoring to the sea. The aim of this project is: - to identify bottleneck is related to the construction, installation and use of underwater seismic station; - to define the most appropriate and low-cost architecture to guarantee the minimum functionality required for a seismic station. In order to obtain reliable seafloor seismic signals integrated to land-based network, the requirements to be fulfill are: - an acceptable coupling with the seabed; - the orientation of the components with respect to the magnetic North and to the verticality; - the correct time stamp of the data; - the data transfer to the land for the integration. Currently, the optimal solution for offshore seismic station is a cable connection to power and real-time data transfer, like the case of Western Ionian Sea cabled observatory, one of the operative node of the EMSO research infrastructure (European Multidisciplinary Seafloor and water column Observatory, http://emso-eu.org). But in the Mediterranean many seismic areas are located a few tens-hundreds of miles from the coast and cabled solutions are not feasible essentially for economic reasons. For this kind of installations EMSO research infrastructure foresees no-cabled solution, that requires a surface buoy deployed in the vicinity seafloor modules.This project plans to develop a surface buoy equipped with autonomous power supply system to power also the seafloor platforms and two-way communication system enabling the data transfer through latest generation of broadband radio communication or satellite link (Fig. 1). All the components of the prototype system are described.

D'Anna, G.; Calore, D.; Mangano, G.; D'Alessandro, A.; Favali, P.

2011-12-01

493

Relationship between marine mammal stranding events and offshore earthquakes  

NASA Astrophysics Data System (ADS)

The causes of marine mammal stranding events are largely unknown, but may relate to ocean currents, severe weather, anthropogenic noise pollution, and other factors. Large stranding events have been suggested to occur as a result of offshore earthquakes but there is little evidence as yet to support this hypothesis. Stranding events occur in hotspots, which are sometimes areas of high seismic activity, such as Taiwan, and other times, in areas that are removed from seismic zones, such as Cape Cod. We analyse a large and robust dataset of marine mammal stranding data collected off the coast of Washington and Oregon from 1999 to 2010, to look for statistical connections to offshore earthquakes. We looked forward, as well as backward in time from significant seismic events, to ascertain whether stranding occurrences, if connected to earthquakes, are a result of the earthquake preparation period or the earthquake itself. Possible mechanisms are discussed.

Grant, Rachel; Savirina, Anna; Hoppit, Will

2014-05-01

494

Gulf of Mexico Helicopter Offshore System Technologies Recommended Development Path  

NASA Technical Reports Server (NTRS)

The National Aeronautics and Space Administration (NASA) Advanced Air Transportation Technologies (AATT) project in cooperation with the Department of Transportation (DOT) Volpe National Transportation Systems Center (VNTSC) contracted with the System Resources Corporation (SRC) for the evaluation of the existing environment and the identification of user and service provider needs in the Gulf of Mexico low-altitude Offshore Sector. The results of this contractor activity are reported in the Gulf of Mexico Helicopter Offshore System Technologies Engineering Needs Assessment. A recommended system design and transition strategy was then developed to satisfy the identified needs within the constraints of the environment. This work, also performed under contract to NASA, is the subject of this report.

Koenke, Edmund J.; Williams, Larry; Calafa, Caesar

1999-01-01

495

Medical problems in off-shore oil drilling in Nigeria.  

PubMed

This paper discusses the surgical and medical problems affecting off-shore oil drilling workers in the south-eastern Atlantic coastline of the Nigerian territorial waters; about 50-60 kilometers from land. There were a total of 1300 attendances at the off-shore clinic within 12 months, ie 3.6 daily for a workforce of 110, were successfully managed by 2 well-trained industrial staff nurses who were supervised by an experienced base doctor on-shore. Although, most of the patients were treated for minor medical and surgical conditions such as headaches, malaria, cuts and bruises, a few acute emergencies arose which had to be taken on-shore by helicopters, for subsequent management. Four accidental deaths occurred during the period, one of them was clearly preventable but there were no major disasters. This demonstrated the effectiveness and significant role which well-trained nurses can play in industrial health. PMID:2051760

Onuba, O

1991-01-01

496

Integrated reservoir management in the Carpinteria Offshore Field  

SciTech Connect

The Carpinteria Offshore Field is located near Santa Barbara, California. The State of California owns the portion of the field nearest the coast, and the US Federal Government the portion of the field that lies beyond a statutory three-mile coastal water limit. This mature reservoir has yielded more than 100 million barrels of oil from five platforms in its 30 years of production. The US Department of Energy`s Los Alamos National Laboratory (managed by the University of California) has joined with the State Lands Commission of California, the US Department of Interior`s Minerals Management Service, and the independent operator of the field, Pacific Operators Offshore, Inc., in a unique collaboration to redevelop the field. The reservoir management strategy for the Carpinteria Field relies on a long-term investment in simulation tools and expertise. These technologies and expertise are available to all project participants through a virtual enterprise business model.

Whitney, E.M.; Pawar, R.J.; Kendall, R.P.

1998-12-31

497

Parametric Cost Deployment  

NASA Technical Reports Server (NTRS)

Parametric cost analysis is a mathematical approach to estimating cost. Parametric cost analysis uses non-cost parameters, such as quality characteristics, to estimate the cost to bring forth, sustain, and retire a product. This paper reviews parametric cost analysis and shows how it can be used within the cost deployment process.

Dean, Edwin B.

1995-01-01

498

Traveltime tomographic inversion of obs data, offshore western Svalbard  

Microsoft Academic Search

We present the results of the tomographic inversion of the data acquired within the HYDRATECH project offshore western Svalbard in the immediate vicinity of the Knipovich Ridge system. The data acquisition encompassed continuous single-channel high-resolution seismic reflection profiling, simultaneous multicomponent-OBS recording, echo-sounding. The acoustic source consisted of an array of two sleeve guns. The OBS instruments are from IFREMER, GEOMAR

G. Madrussani; G. Rossi; A. Camerlenghi

2003-01-01

499

Stress and accidents in the offshore oil and gas industry  

SciTech Connect

This book is a comprehensive analysis of occupational stress and accidents among personnel working in the European offshore oil and gas industry. Identifies sources of stress and predicts stressor outcomes. Examines job dissatisfaction, mental well-being and their relation to accidents. Also explores the differences within occupational status (operator versus contractor) and type of installation (drilling rigs versus fixed production platforms). Conclusions presented include the growing need for extensive management involvement, responsibility, and understanding in this exceptionally high environmental stress industry.

Sutherland, V.J.; Cooper, C.L.

1991-01-01

500

Drugs offshore: companies stepping up fight against hidden adversary  

SciTech Connect

Oil companies worldwide are effectively fighting a growing nemesis, drug and alcohol abuse on offshore installations. It is estimated that companies are losing millions of dollars in lost productivity, accidents, and thefts caused by on-the-job use of illegal drugs. Some of the measures being employed to combat the use of such drugs, e.g., tight control, better communications, diversions for employees, and the use of sniffer dogs, are discussed.

Redden, J.

1986-01-01