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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 42 for “"Gas pipelines"”.
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A Financial Analysis of Natural Gas Pipelines
Made available in DSpace on 2014-12-10T16:44:42Z (GMT). No. of bitstreams: 1 6408435.pdf: 13442415 bytes, checksum: 4a32fc4a604a19d6bcad49331622dd2f (MD5) Previous issue date: 1964
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Multiphase flow modeling and deposition of hydrates in oil and gas pipelines
… flow is a ubiquitous feature of oil and gas production and hence, all flow assurance issues involve multiphase flow. The risk of plugging due to gas hydrate formation remains one of the most prevailing flow-assurance problems in deepwater subsea oil and gas operations. Due to the …
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Key factors influencing the reliability of trunk gas pipelines in the West Siberian North
… Russia has been the world's largest natural gas producer. Nearly 80% of total Russian production comes from three West Siberian enterprises of RAO Gazprom, Russia's monopolistic gas company. These gas fields are among the largest in the world and lie astride or just north of the Arctic Circle …
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Partially Observable Markov Process Decision Modeling for the Optimal Maintenance of Oil and Gas Pipelines
… applications of POMDP for maintaining oil and gas pipelines. Pipeline maintenance operations comprise several uncertain elements, especially when addressing deteriorations caused by corrosion. These include the deterioration rate, the effectiveness of maintenance operations, and the accuracy of …
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Power and energy : geopolitical aspects of the transnational natural gas pipelines from the Caspian Sea basin to Europe
… over control of the Caspian Sea basin natural gas resources and the transportation routes among four world powers--Russia, the European Union, the United States, and China. The author assesses the risks posed by instability in the Caspian Sea states to the realization of proposed natural gas …
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Development of a Framework for Integrated Oil and gas Pipeline Monitoring and Incident Mitigation System (IOPMIMS)
… of Third Party Interference (TPI) on Oil and Gas Pipelines is on the rise across the world. TPI is not only common in developing countries but is now occasionally experienced in developed countries including Germany and the UK. The risks posed by these third-party activities on Oil and Gas …
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Hydrogen purity assessment using laser absorption Spectroscopy
… fields involving hydrogen injection into natural gas pipelines and fuel cell research. This study addresses the limitations of current hydrogen measurement techniques by developing a novel hydrogen spectrometer (𝐻2-Spectrometer) based on direct Tunable Diode Laser Absorption Spectroscopy …
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Development of instrumentation for acoustic monitoring
… wave sensor for the identification of leaks in gas pipelines. One of the many type of signals associated with the high velocity gas flowing out of a hole in the pipeline is the ramp or step pressure drop.;A large 3-inch diameter diaphragm was installed in an attempt to detect the low frequency …
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Effect of plastic strain on the corrosion of X65 pipeline steel
… and failure for iron alloys used in oil and gas pipelines. Pitting corrosion is a particular type of corrosion that is not well-understood and can play in important role in material failure. Research has shown that areas of increased plastic strain develop within pits which may promote crack …
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Hydrate formation and adhesion on low surface energy materials
… solid substances that often form inside oil and gas pipelines and are responsible for flow blockages, sometimes leading to catastrophic disasters. Minimizing hydrate adhesion and accumulation of solids on pipelines can effectively address this problem. In this thesis, we reduce the adhesion of …
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Assessment of Current Oil Pipeline Disasters and Mitigation Strategies in Nigeria
… of the twenty-nine states affected by oil and gas pipelines were randomly selected according to the six geopolitical zones of Nigeria. A total of 400 copies of the questionnaire were administered and several focus group discussions and key informant interviews were conducted across the six …
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Hydrate-phobic surfaces
… and subsequent plugging of deep-sea oil and gas pipelines represent a significant bottleneck for ultra deep-sea production. Current methods for hydrate mitigation focus on injecting thermodynamic or kinetic inhibitors into the flow, heating the pipe walls, or managing the flow of formed …
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Optimizing power cylinder lubrication on a large bore natural gas engine
… compressors, located along America's natural gas pipelines, pump natural gas across the United States. These compressors are powered by 2-stroke, large bore natural gas burning engines. Lowering the operating costs, reducing the emissions, and ensuring that these engines remain compliant with …
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Determining lateral river channel activity with respect to safety of pipeline crossings
When oil and gas pipelines cross rivers they are often buried in the ground<br/>beneath the floodplain and river bed. There is a risk that river will expose the pipe by<br/>lateral bank erosion, as well as bed erosion, and then there is a risk that the pipe will<br/>break. Pipe failure can cause …
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Chemically-bonded enamel-coated steel pipelines for corrosion protection and flow efficiency
… and safety of hazardous liquid and natural gas pipelines while reducing pressure loss. Out of five types of enamels and their various mixtures, Tomatec slurry and GP2118 powder were selected for steel pipeline applications. They were applied at approximately 810 °C to the inside surface of …
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From Scar To Scaffold: The Afterlife of the Oil Pipeline for a Decarbonizing World
With over 86,000 kilometers of crude oil pipelines—and more than 2.13 million kilometers of total oil and gas pipelines in the United States as of 2024—many segments are already corroded and aging, deeply embedded within urban and ecological systems that are increasingly endangered. As the global …
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Stress corrosion cracking and corrosion of carbon steel in simulated fuel-grade ethanol
… alternative liquid fuel to replace conventional gasoline for road transportation. One of the key challenges for the future use of bioethanol is to increase its availability in the market via an efficient and economic way. However, one major concern in using the existing gas-pipelines to transport …
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Predicting hydrates plugging risk in subsea gas pipeline: CFD, analytical and linear regression modelling.
… in managing hydrate plugging risk for gas pipelines. The main challenges lie in accurately predicting hydrate deposition rates and associated pressure drops. To overcome these limitations, the study developed and validated a 3D computational model using computational fluid dynamics …
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Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity: field scale experimental and numerical study
With the increased use of natural gas as a transition fuel on the path toward low-carbon energy, safety and environmental concerns from leaking underground natural gas pipelines are becoming more widespread. Pipeline leakage can be catastrophic when flammable mixtures of methane and air accumulate …
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Landslide-pipeline interaction for onshore slopes in silty sand
Onshore oil and gas pipelines are often routed through hazardous terrain owing to the need to traverse large distances and inevitably crosses large slopes and river valleys. A type of linear critical infrastructure, pipelines must be designed to withstand the soil forces created by landslides, …
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