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 19 of 19 for “"Oil and gas pipelines"”.
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Multiphase flow modeling and deposition of hydrates in oil and gas pipelines
Multiphase 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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Partially Observable Markov Process Decision Modeling for the Optimal Maintenance of Oil and Gas Pipelines
… the 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 …
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Development of a Framework for Integrated Oil and gas Pipeline Monitoring and Incident Mitigation System (IOPMIMS)
The problem 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 …
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Effect of plastic strain on the corrosion of X65 pipeline steel
Corrosion is an important mode of degradation 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 …
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Hydrate formation and adhesion on low surface energy materials
… ice-like 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 …
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Assessment of Current Oil Pipeline Disasters and Mitigation Strategies in Nigeria
AbstractThis study assessed the current oil pipeline disasters and mitigation strategies in Nigeria. The purpose of the study was to determine the current causes and impacts of pipeline disasters in Nigeria between the years 2000 and 2022, and to examine the current mitigation measures to stem the …
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Hydrate-phobic surfaces
Clathrate hydrate formation 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 …
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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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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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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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Environmental equity in southeast Louisiana: oil, people, policy, and the geography of industrial hazards
This dissertation explores issues and concepts underlying the creation of Louisiana’s rural-industrial petrochemical complex as they relate to environmental equity and industrial development’s deleterious consequences. Cumulative hazards models examine the distribution of technological hazards …
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The socioeconomic consequences of the U.S. fracking boom
… central theme of this dissertation is to understand the socioeconomic consequences associated with the technological breakthroughs in the U.S. energy landscape. The dissertation combines econometric methods with spatial techniques to identify the externalities in water and energy transport …
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Poliaspartiniai dažai metalinių ir medinių paviršių dangoms /
… with excellent resistance to mechanical and chemical effects, UV rays, can be both glossy and semi-glossy, fast drying and have excellent stability. Polyaspartic paints are widely used in the metal industry for protection of wind turbines, oil and gas pipelines, cars, bridges and various …
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The assessment of the effects of deposits and corrosion on flow efficiency in petroleum products pipelines for integrity management
… been developed for assessing flow efficiency in oil and gas pipelines. However, no such models for assessing flow efficiency have been developed for petroleum products pipelines. The main objectives of this study is to assess and predict the effect of deposits and corrosion on flow efficiency in …
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Indo-Pakistani conflict and development of South Asia: is an independent Kashmir State a possible consideration?
The thesis explores the conflict between India and Pakistan over Kashmir as a dispute symbol. It highlights the socio-economic implications of the conflict on the conflicting states of India and Pakistan. The conflicting symbol, Kashmir, as well as the entire South Asia that house all of them, with …
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Multiphysics Modelling on the Effects of Composition and Microstructure during Tribocorrosion of Aluminum-based Metals and Structures
Wear and corrosion are two major threats to material integrity in multiple real-life circumstances, including oil and gas pipelines, marine and offshore infrastructures and transportations and biomedical implants. Furthermore, the synergistic effects between the two, named tribocorrosion, could …
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Understanding Functional Silica Additives for HDPE Composite Materials
… corrosion in challenging environments such as oil and gas pipelines. The main body of work involves the analysis of the chemistry of Aerosil® grade pyrogenic silicas mainly A200, R8200, R9200, and R812S. Then, the work focused on the assessment of the processing characteristics, properties, and …
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The effect of pre-strain on the fracture toughness of line pipe steel
Oil and gas pipelines are designed using recognised pipeline design codes, which typically limit the applied stresses and strains to below yield. Pipelines may be subjected to higher plastic strains before they enter service and during operation, either intentionally, as a result of the method of …
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The design of the frugal robot for detecting in-pipe corrosion in the oil and gas sector
… the requirement for the Master’s in Information and Communications Technology degree, Durban University of Technology, Durban, South Africa, 2026.