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 50 for “"oil wells"”.
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Finite elements analysis of pipe deformation in oil wells
Includes bibliographical references (pages 55-58).
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Tactile mapping of harsh, constrained environments, with an application to oil wells
… sensors. A representative case is the mapping of oil wells. In these conditions, tactile exploration is appealing. In this work, the environment is mapped tactilely, by a manipulator whose only sensors are joint encoders. The robot autonomously explores the environment collecting few, sparse …
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Upper cretaceous and lower cenozoic foraminifera of three oil wells in northwestern Iraq
"Seventy-five samples of well cuttings and cores from the Iraq Petroleum Company Butmah Well No. 9, Ain Zalah Well No. 16 and Ain Zalah Well No. 17, in northwestern Iraq at approximately 36° 37' north latitude and 42° 41' east longitude, have been examined in detail. The lithologic descriptive term …
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Development, model validation, and preliminary experimental verification of an FEA program for structural analysis of casing in casing for oil wells.
Oil and gas wells rely upon long steel pipes, known as casing, that run down the depth of the well. During drilling, a section of pipe is cemented in place and another section of casing is run inside, repeating this process as necessary. This process is not 100% accurate, leading to eccentric …
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Development, model validation, and preliminary experimental verification of an FEA program for structural analysis of casing in casing for oil wells.
Oil and gas wells rely upon long steel pipes, known as casing, that run down the depth of the well. During drilling, a section of pipe is cemented in place and another section of casing is run inside, repeating this process as necessary. This process is not 100% accurate, leading to eccentric …
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A computational analysis on an initial application of a Hemiwedge based sub-surface safety valve for use in ultra-deepwater oil wells and extreme high pressure, high temperature environments
… valve (SSSV). With the growing needs in the oil industry and new finds of ultra-deepwater reservoirs in the Gulf of Mexico (GOM), this SSSV will provide a small but necessary advancement to harvest these new oil reserves from extreme high-pressure/high-temperature (XHPHT) environments. …
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Mechanical design for the tactile exploration of constrained internal geometries
Rising world oil prices and advanced oil recovery techniques have made it economically attractive to rehabilitate abandoned oil wells. This requires guiding tools through well junctions where divergent branches leave the main wellbore. The unknown locations and shapes of these junctions must be …
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The Afterlife of Wells, from oil to soil in the Amazonia
… era for the country as the first barrel of oil was extracted from the Amazon. Nevertheless, resource extraction has not resulted in sustainable economic prosperity, nor has it reduced the inequality affecting local and indigenous communities. Abandoned oil wells are a significant source of …
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The Fluid Mechanics of Hydraulic Fracturing (Oil Recovery)
… hydraulic fracture process is the stimulation of oil wells of relatively low permeability. This is accomplished by pumping high pressure fluid down the wellbore in an effort to fracture the surrounding rock, and thereby, increase the effective permeability of the well. The principal goal of the …
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A novel framework for acoustic diagnostic of artificial lift system for oil-production
Oil extraction on many reservoirs requires the use of rod pump systems to pump the fluid to the surface. A longstanding challenging issue in the operation of rod-pump system is the ability to determine the downhole pump conditions based on the knowledge of a finite set of measurables at the top. A …
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A digital approach to the management of brownfields
… analysis, & optimization of gas lifted oil wells. Building on the output of validated physics-based models, this thesis investigates a range of analytic methods which may be used to determine a probable depth of gas lift injection of wells without pressure gauges, and finds that the …
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Determination of Habitat Preferences of Pronghorn (Antilocapra americana) on the Rolling Plains of Texas Using GIS and Remote Sensing
… aspect, and distances to water, roads, and oil wells. Results showed that pronghorn on the ranch crossed modified fencing significantly less than other types of fencing. Pronghorn selected for all habitat parameters to various degrees, with the most important being vegetation type. Habitat …
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Improving gas fixation in acetogenic bacteria
… and transportation, and methane from distributed oil wells and shale gas formations. Generally, these gases are released to the environment, or CH₄ is burned to CO₂, as CH4 is a more harmful greenhouse gas than CO₂. Researchers are increasingly interested in methods to fix these two gases into …
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Análise modal operacional de uma bomba centrífuga submersa utilizando a decomposição melhorada no domínio da frequência
… from a maintenance point of view, for oil exploitation, such as offshore oil wells and seabed, so that any type of intervention is very costly, in addition to production loss. This work aims to identify the modal parameters, that is, the natural frequencies, damping rates and vibration …
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Rotation of a slender rod injected into a cylindrical constraint
… This problem is of particular application to coiled tubing operations in the oil and gas industry where helical buckling and eventual lockup occur, thereby preventing complete access to horizontal oil wells. Our approach focuses on using desktop experiments to perform a precise exploration of …
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Probing the Low Temperature Oxidation of Furanic Biofuels, 2-Methyltetrahydrofuran and 2,5-Dimethylfuran, Utilizing Orthogonal Time-of-Flight Mass Spectrometry Coupled to Synchrotron Radiation
… of sourcing transportation fuels from depleting oil wells to regenerative, biological based solutions. One avenue of biologically sourced fuel involves the extraction of C5 and C6 sugars from the woody, fibrous, and inedible plant materials, otherwise known as lignocellulosic biomass. These …
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Identifying potential geothermal resources from co-produced fluids using existing data from drilling logs : Williston, North Dakota
… One specific resource is co-produced water from oil wells that are not currently producing, but can yield formation waters that are both high enough in temperature and fluid volume to operate the turbines of binary geothermal power systems. The data required to identify sites, i.e. bottom-hole …
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Designing a wireless underwater optical communication system
… drives this need is the monitoring of deep sea oil wells by AUVs that could be stationed at the well and communicate surveillance data wirelessly to a base station. In this thesis, optical communication using LEDs is presented as an improvement over acoustic modems for scenarios where high …
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ΘΕΡΜΟΜΗΧΑΝΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΗΣ ΛΙΘΟΣΦΑΙΡΑΣ ΣΤΟΝ ΕΛΛΗΝΙΚΟ ΧΩΡΟ
… STRESSES MEASURED THROUGH HYDROFRACTURING IN OIL WELLS, THE TECTONIC SUBSIDENCE OF NEOGENE SEDIMENTARY BASINS, TEMPERATURE MEASUREMENTS AND ESTIMATED HEAT FLOW, PALEOGEOTHERMAL INDICATORS, DEEP GEOPHYSICAL DATA RELATED TO THE CRUST STRUCTURE, RHEOLOGICAL MODELS FOR THE STRENGTH OF THE …
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A nanochemomechanical investigation of carbonated cement paste
… be implemented in cement paste-lined, defunct oil wells. Such a setup involves an interface between cement paste and large quantities of CO₂, and corrosion of the cement paste is inevitable. This would make carbon sequestration the first technology to employ carbonated cement paste as a …
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