Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Offshore drilling"”.
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A novel engineering framework for risk assessment of Mobile Offshore Drilling Units
… resources. Hence, the performance of mobile offshore drilling units (MODUs) under various conditions has received considerable attention. MODUs are designed, constructed, operated, and managed for harsh geographical environments, thus they are unavoidably exposed to a wide range of uncertain …
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An investigation of energy-based planned maintenance of offshore drilling mud pumps.
Mud pumps used on offshore installations for drilling operations have been known to experience unpredictable breakdowns, including during critical stages of drilling. The fluid end has been identified as requiring more maintenance work due to component failure, compared to the power end. The most …
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An active-path-dissolution model for corrosion-fatigue cracking of drill-pipe steels in offshore drilling environments
… life of drill-pipe steels in simulated offshore-drilling environments was predicted using an analytical model. This model, named the Active-Path-Dissolution (APD) model, simulates a sequence of three corrosion-fatigue processes: chemical notching process, microcrack development, and …
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Development of a novel knowledge-based decision support system for accident prevention of oil and gas drilling process
Oil and gas drilling process is highly associated with numerous hazardous conditions and potential risks at onshore and offshore drilling domains due to the unpredictable nature of this procedure. Thus, there is a sheer need of an efficient Knowledge-Based Decision Support System (KBDSS) based on …
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How Contractual Risk Allocation Provisions of Oil and Gas Contracts Have Been or May Be interpreted by an English Court – A Case Study of Some Model Offshore Drilling Rig Contracts Developed in the United Kingdom, Canada and the United States of America
… study utilises petroleum industry standard form offshore drilling contracts in the United Kingdom, Canada and the United States of America as the context for this analysis, and examines the risks associated with drilling and other incidental operations, in the light of catastrophic events such as …
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STRUCTURAL RELIABILITY ANALYSIS BASED ON MAXIMUM ENTROPY DISTRIBUTION WITH FRACTIONAL MOMENTS
… To predict the low probability of failure of offshore drilling riser system accurately and efficiently is crucial but challenging. An improved univariate density estimation method based on maximum entropy theory is proposed in this thesis to perform structural reliability analysis. The bias …
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Visualization of vibration experienced in offshore platforms
… VIV is vibration experienced by marine risers in offshore drilling platforms due to ocean current flows, and appears to be perpendicular to the direction of such flows. VIV causes oil companies large capital losses, supply chain disruption, and environmental and brand name damage. For these …
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On Power: How Colombia’s National Oil Company Can Support the Country’s Energy Transition
… It has shifted from geology to geography, from offshore drilling to offshore wind. Is this country inherently different from twenty-first century Colombia?
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Increasing Return on Assets through insourcing logistics
… the transportation of their products to offshore oil rigs at sea - a function currently provided by their customers - will increase asset velocity of their most important tools, and allow them to service more customers with fewer tools. This is an especially important consideration in …
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The underestimated value of safety in achieving organizational goals : cast analysis off the Macondo accident
… in the rig Deepwater Horizon performing drilling operations on the Macondo Prospect Well, in the Gulf of Mexico, led to the largest oil spill in the history of the petroleum industry. Eleven crewmembers lost their lives and around 4.9 million barrels of oil were discharged into the ocean …
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Approaches and attitudes of managers to collective bargaining in North East Scotland.
… engineering - and four oil-related industries - offshore drilling, offshore catering, oil exploration and production, and oil-related service/engineering. The nature of management-workforce relations in each establishment was examined and the management style in each establishment was identified …
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Safety On A Drilling Rig: Is It Safety Culture?
<p>Why do workers on a modern offshore drilling rig continue to make decisions leading to unsafe conditions, acts or incidents? In a perfect world, workers in any industry would go to work and come home in the same condition as they started the day: no incidents. Worker injuries and deaths are all …
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Hydrodynamic Study of Pisciform Locomotion with a Towed Biolocomotion Emulator
… in the ocean with deep-sea exploration or offshore drilling for petroleum and natural gas, the demand for prolonging underwater operations is growing significantly. Therefore, it is critical for robotic designers to understand the physics of pisciform (fish-like) locomotion and learn how to …
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NON-DIMENSIONAL DATA-DRIVEN MODELS OF COMPUTATIONAL FLUID DYNAMICS (CFD) OF MULTI-PHASE FLOW IN ANNULUS
In the offshore drilling process of an oil and gas well, the blowout preventer (BOP) serves as a critical safety device to monitor and control wells to prevent blowouts. However, it is usually subject to the high-temperature and high-pressure (HTHP) conditions. These extreme working conditions …
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Numerical analysis of a shear ram and experimental determination of fracture parameters
… of Mexico in April 2010 revealed how much the offshore drilling industry relies on the Blowout Preventer (BOP) as the primary means of controlling a 'well kick' or 'blowout'. One of the most important components of the BOP are the shear rams which are tasked with cutting the drilling string in …
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Detecting and analyzing coherent structures in two-dimensional dynamical systems
… a diverse marine environment, and a growing offshore drilling industry, and understanding the surface flows will enable better informed decisions to be made in this environmentally delicate domain. In addition to applying the LCS techniques, for the first time we account for the impact of …
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Vortex shedding from a vibrating cable with attached spherical bodies in a linear shear flow
… part of a larger structural system, such as an offshore drilling platform. They are also used to support marker buoys, as well as anchored or towed instrument arrays. Consequently, the resonant flow-induced oscillation of these cables, caused by vortex shedding, is extremely undesirable because …
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Context and Place Effects in Environmental Public Opinion
… 2008 and 2010 to analyze public opinion toward offshore oil drilling before and after the Deepwater Horizon oil spill. I find that residence in counties highly dependent upon the offshore drilling industry was predictive of pro-drilling attitudes following the spill, though not prior to the …
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Hydrodynamic performance of multi-component structures in oscillatory flow, from blow-out preventer to dual Cylinder interference
… is essential for the whole well- being of the offshore drilling system, and this calls for a careful investigation on the understanding of the BOP dynamics and its effect on the whole system. However, due to the complexity of the structure itself, the hydrodynamics of the BOP are difficult to …
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Biomarkers of Human Exposure and Effect to Petrogenic Polycyclic Aromatic Hydrocarbons
Safety of seafood harvested from the Gulf of Mexico has been a primary concern since the 2010 Deepwater Horizon (DWH) oil spill. Petrogenic polycyclic aromatic hydrocarbons (PAHs) found in crude oil have the potential to bioaccumulate in seafood and render consumers vulnerable to adverse health …