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 28 for “"Drilling Process"”.
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Assessment of nanoparticle emission of polypropylene, polyester and epoxy nanocomposites during automated drilling process.
… yet to evaluate or quantify either the risk, the process of potential exposure, or the impact of embedded nanoparticles in commercial composites when they are released during machining processes. In this thesis, four groups of nanocomposites are identified as being used within industry and having …
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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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A Microscale Analysis of Millimeter-wave Induced Vitrified Basalt for Use in Enhanced Geothermal Energy Systems
… limitations with the current geothermal drilling process. A new technology in the field of EGS that uses a millimeter (MM) wave gyrotron, which allows for quicker, more efficient drilling could be a potential solution to these limitations. The MM-wave drilling process, a technique …
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Simulating a virtual drilling task using audio, visual, and mouse movement cues during the COVID-19 pandemic
This work examined whether a real-world drilling task can be successfully simulated using combinations of appropriate audio, visual cues, and basic haptic stimuli obtained with mouse movements instead of a haptic device. Two experiments were conducted where participants were asked to accomplish a …
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Optimizing the economic efficiency by micro-drill life improvement during deep-hole drilling in the 212-Valve manufacturing process
The micro-drilling process by robodrills in the production of valves at Waters Corporation is the bottleneck caused by the short drill life. This thesis analyzed the chip formation and removal during the process to improve the tool life. The effects of the tool materials, geometry and peck drilling …
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Automation of NC Programming with Artificial Intelligence
… intelligent, data-driven methods of making their processes more efficient. In particular, AI-driven automation of computer numerically controlled (CNC) programming, the process by which cutting tool and operation parameters governing CNC machines are determined, has potential to yield dramatic …
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Establishment of the relationship between the sediments mineral composition and groundwater quality of the primary aquifers in the Maputaland coastal plain
… type of rock Formation penetrated during the drilling process. The sediments of the aquifers were classified into the Kwambonambi, Sibaya, Kosi Bay, Port Durnford, Uloa and St Lucia Formations, according to the established lithological Units, using the grain size, texture and colours of the …
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Estudio de prefactibilidad para la instalación de una planta productora de muebles multifunción de dormitorio, elaborados a base de melamina
… the bottleneck being the stage of the drilling process, in addition to having a semi-automatic production process. Regarding the financial and economic analysis, an investment of 1 008 629 soles was determined, in which 60% corresponds to external financing by a banking entity. A …
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Electrical noise model for detection circuitry of an NMR-based formation evaluation Tool
… Resonance (NMR) measurements in logging while drilling NMR instruments are often of the same amplitude as the noise generated by the instruments. Designers of these devices are thus usually faced with the challenging task of improving the sensitivity of the measurement process either by …
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Aerodynamic performance measurements of a film-cooled turbine stage
… hole geometry was created using a laser drilling process to produce the required 43,000 cooling holes. The film-cooled stage was then tested over a range of operating conditions (pressure ratios and corrected speeds) and over a range of coolant-to-mainstream mass flow and temperature …
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Smart Drilling: A computer-based system for planning drilling operations.
In this thesis, a prototype 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 …
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Magnetic Switches as Active Device Replacements for Harsh Environments
… purposes of testing a number of effects on the drilling process. The modulator was built in a number of fashions in order to experiment with the various architectures made possible by this work. The proven designs were later implemented in a laboratory machine running extensive testing. These …
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An investigation of laser drilling variation and the application of a knowledge management framework
… increasingly complex and precise manufacturing processes. One such process employed at Alstom Power is the laser drilling holes in gas turbine blades and vanes. The complexity of such advanced manufacturing techniques requires a disciplined approach toward process improvement. In addition, …
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Effects of filtration process variables on filter cake properties and formation
Drilling mud is fundamental during the drilling process because it performs multiple tasks which make the perforation of the rock possible. For this reason, lost circulation, the loss of drilling mud through fractures in the formation, represents a serious issue in the oil and gas industry, since …
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Thermal Drilling and Anchoring on Icy Planetary Bodies
… a dual-function system that first uses a thermal drilling process to burrow into Europa’s surface ice and then serves as an anchor, supporting the mobility of the rover to which it is attached. Thermal drilling provides high reliability but can be energetically costly. An intermittent thermal …
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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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Development of drilling optimization models for autonomous rotary drilling systems.
… and performance improvement techniques in drilling operations. Traditional drilling methods depend on the effectiveness of the human-driller in the management of operating parameters to improve system performance. Although existing work has identified the need to upscale from manual …
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Mathematical Modeling of Fluid Spills in Hydraulically Fractured Well Sites
<p>Improved drilling technology and favorable energy prices have contributed to the rapid pace at which the exploitation of unconventional natural gas is taking place across the United States. As a natural gas well is being drilled, reserve pits are constructed to hold the drilling fluids and other …
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Experimental and numerical analysis of abrasive waterjet drilling of brittle materials
… reaction forces of the specimen during AWJ drilling were matched the reaction forces from the finite element simulation. Three pressure loads of the AWJ exerted on the cavity were assumed for the FEA model, and their effects on the surface displacement distribution were studied through …
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Simultaneous machining of aerospace structural materials using poly-drills
… industry due to their distinct manufacturing processes, good resistance to fatigue crack growth and superior damage tolerance. In the aerospace industry, the drilling process is widely used among all the machining processes as millions of holes are required to produce riveted and bolted joints …
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