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 44 for “"Drilling operations"”.
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Smart Drilling: A computer-based system for planning drilling operations.
… computer aided process planning system--Smart Drilling System is presented. The system will be able to automatically generate plans for multiple hole drilling process, such as tool selection, drilling sequence, and etc. The system contains four modules: (1) Tool selection module, (2) Machining …
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Modeling of Pipe Friction and Smear Effect in Drilling Operations
The increased complexity of drilling programs has led to the development of new drilling techniques and has resulted in problems that were not encountered before. This study focuses on two such issues: 1) to model the influence of wellbore friction on downhole temperatures of the drilling fluid, 2) …
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Design of a Pneumatic Tool for Manual Drilling Operations in Confined Spaces
… manually-operated tool for confined space drilling operations. The purpose of this device is to back-drill pilot holes inside a commercial airplane wing. It is lightweight, and a “locator pin” enables the operator to align the drill over a pilot hole. A suction pad stabilizes the system, …
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Multivariate Time-Series Deep Learning for Short-Term Forecasting of Lost Circulation in Drilling Operations
… circulation is a frequent and costly problem in drilling operations, often leading to non-productive time, operational delays, and increased risk. Accurate prediction of lost circulation is challenging due to the complex, time-dependent interactions among drilling parameters, formation …
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Evaluation of recrosslinkable preformed particle gel (RPPG) as a fluid loss control material during drilling operations
… expensive, and time-consuming problems during drilling operations is the loss of circulation, which could result in several consequences, including wellbore collapse, fluid inflow, formation damage, environmental issues, and nonproductive time. This research aims to evaluate novel materials …
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Probabilistic modelling of oil rig drilling operations for business decision support: a real world application of Bayesian networks and computational intelligence.
… tool for forecasting the performance of rig drilling operations. A prototype for a tool able to forecast the future performance of a drilling operation is created using the obtained data, the statistical model and the experts' domain knowledge. This work makes the following contributions: …
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Using optimization and lean principles to design work cells and make capital purchase decisions for hole drilling operations in turbine airfoil manufacturing
Classical manufacturing work cells have machines to perform each operation in the process, the number of each type of machine being chosen so that all machines would be equally busy. Although design of work cells for producing one product is straightforward, the design of a multi-product work cell …
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Unconfined compressive strength prediction using drilling parameters and analyzing feature importance through principal components analysis
… properties is beneficial if not essential for drilling and completion operations in the oil and gas industry. The Unconfined Compressive Strength (UCS) is the maximum compressive force applied to cylindrical rock samples without breaking under unconfined conditions. Unconfined Compressive …
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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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Identifying the Optimum Zone for Reducing Drill String Vibrations
… address the vibration problems that occur during drilling operations. Due to the rotational motion effected on the drill string while drilling, vibrations occur, and when these vibrations become excessive, the drill string may oscillate in a manner that could damage the pipes and damage other …
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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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Application of traveling salesman problem in generating a collision-free tool path in drilling
… generates an optimum collision free tool path in drilling operations. The developed optimization algorithm considers multiple constraints such as location of tool origin and presence of obstacles. Furthermore, a discussion on stopping criteria for the developed algorithm is presented. Obtained …
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Admicellar Polymerization to Compatibilize Calcium Carbonate With Oil-Based Drilling Mud
… agents like calcium carbonate (CC) are added to drilling mud to improve mud properties and performance during oil and gas drilling operations. Oil-based mud (OBM), a more preferred drilling mud, being hydrophobic is particularly non-compatible with hydrophilic CC. This work explored an …
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From nanohardness to strength properties of cohesive-frictional materials : application to shale materials
… friction angle) are critical for the success of drilling operations.
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Drilling fluids filtration and impact on formation damage.
… performance based on the total skin factor after drilling operations are: production logging, flow measurement and well test data. The total skin factor is used in the flow equations to estimate the production rate in wells that are affected by formation damage in order to optimise the flow system …
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Estratégias baseadas em reticulação de polímeros para evitar perdas de circulação em poços de petróleo
Drilling operations with high e ciency and control is a topic of utmost interest in the exploration of oil and gas because it is directly linked to aspects of personal, environmental and economic safety. Many procedures should be performed for good control of the well. Among them, it is essential …
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The impact of hydraulic fracturing on housing values in Weld County, Colorado: a hedonic analysis
… hence property values. However, the increase in drilling activity has generated sizable gains in local employment and a subsequent increase in demand for housing. In spite of controversies, there is almost no research evaluating whether proximity and level of drilling activity affects house …
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Seismic Imaging and Velocity Model Building in the Thrace Region, Northwestern Turkey: A Case Study
… This region is primarily a gas-rich zone with drilling operations starting in the 1970s and demand continuing even now. The target zone in the region is Upper Oligocene Osmancik deltaic sandstone and minor shale. The region developed as a fore-arc basin during medial Eocene to Oligocene time. …
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Rethinking Operator-Contractor Risk Allocation in a post-Macondo Era
… with people, property and the environment during drilling operations drive operators and contractors to use contracting practices such as mutual indemnity agreements to allocate risks. The management of these physical exposures is without regard to negligence, and most times, the gross negligence …
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