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Evaluation Of Drill Bit Performance Taking Into Account The In Situ Stresses
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Book Synopsis Evaluation of drill bit performance taking into account the in situ stresses by :
Download or read book Evaluation of drill bit performance taking into account the in situ stresses written by and published by . This book was released on 1906 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: O presente estudo descreve uma correlação entre o desempenho obtido por brocas de perfuração e o estado de tensões atuante na formação rochosa localizada imediatamente abaixo do fundo do poço. Os dados de desempenho de brocas de seis poços perfurados na costa marítima brasileira foram coletados e analisados. Tendo em vista reduzir o empirismo associado com este tipo de análise, é implementado um estudo que considera o perfil geomecânico do poço. O perfil geomecânico de uma dada formação rochosa é composto de suas propriedades mecânicas (módulo de Young, relação de Poisson, resistência à compressão simples, ângulo de atrito interno etc.), das pressões dos fluidos das formações e das tensões totais in situ. A dissertação mostra a sistemática utilizada para avaliar as tensões no fundo do poço através de um programa de elementos finitos 3D. Através destas tensões é possível definir um índice de plastificação à frente da broca de perfuração e o rendimento da mesma é avaliado levando este índice em conta. Alguns dos poços analisados foram perfurados em águas profundas, sendo que os resultados obtidos até o momento mostraram um grande potencial para a melhor compreensão de altos e baixos rendimentos com respeito à taxa de penetração da broca, de uma maneira racional. Baseados nesta análise novos estudos para avaliação de brocas poderão ser implementados indicando que reduções significativas de custo de perfuração poderão ser obtidas.
Book Synopsis Evaluation of Drill Bit Performance for Carbon-fiber Composites by :
Download or read book Evaluation of Drill Bit Performance for Carbon-fiber Composites written by and published by . This book was released on 2008 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since composite materials have been used in the aerospace industry, there have been problems with cutting and machining them. One of the reasons for this problem was the dearth of available tooling to machine composites. As research in composites progressed and as composites found wide application in the aerospace industry, efforts have been made to develop good and efficient tools to machine them. Nevertheless, this effort is still ongoing to develop better tools, as the problems faced during machining have not been totally eliminated. Of the different machining operations performed on composite materials, drilling is the most common. The major problems faced during the drilling of composite materials are delamination and fibers pull out. Delamination reduces the strength of the composite. Another problem that persists is the effect of excess cutting temperatures on the quality of the drilled hole. Excess cutting temperatures affect the dimensional accuracy of the drilled hole and deteriorate its surface finish. Excess cutting temperatures during drilling may melt the matrix and char the drilled hole. Research and experiments conducted on drilling of composite materials have shown that as the cutting edges of the drill bit wear out, the heat generated and the thrust force produced increases. Increase in thrust force gives rise to delamination. Also tool geometry plays a big role in producing a hole with an acceptable quality. Hence, it is important to thoroughly investigate the performance of the drill bit in terms of producing a good hole quality. The objective of this research work was to evaluate the performance of drill bits when drilling carbon-fiber composites. Drill bits were evaluated for temperature, Hole oversize, surface roughness, roundness, thrust force, torque, damage area, and tool wear. By conducting experiments using different drill bits, the drill bit performance was determined for every parameter in question. Based on the results of these experiments, it was possible to determine which drill bit performs optimally for the different parameters investigated in this research work. Also by evaluating the Hole oversize, roundness, and surface roughness, it was be possible to study the effect of speed and feed rate on these parameters. Also tool wear analysis was carried out as a part of this research work.
Book Synopsis Evaluation of High Rotary Speed Drill Bit Performance by : Randy Wayne Ray
Download or read book Evaluation of High Rotary Speed Drill Bit Performance written by Randy Wayne Ray and published by . This book was released on 1990 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Drill Bit Performance Evaluation for Potential Martian Rock Types in Support of Future Martian Subsurface Exploration by : Patrick H. Rogers
Download or read book Drill Bit Performance Evaluation for Potential Martian Rock Types in Support of Future Martian Subsurface Exploration written by Patrick H. Rogers and published by . This book was released on 2003 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Background Study of Drilling Performance and Borehole Breakouts for Development of an in Situ Stress Profile Model by : John B. Cheatham
Download or read book A Background Study of Drilling Performance and Borehole Breakouts for Development of an in Situ Stress Profile Model written by John B. Cheatham and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to investigate methods of arriving at the minimum in situ stress profile in drilled formations using data collected during normal drilling operations and from wireline logs. Particular attention has been given to reviewing research related to pore pressure estimation from logs and drilling data, since the formation pore pressure is an important component of total in situ stress. The potential for use of Artificial Neural Networks to represent drilling performance directly from drilling data without a formal mathematical model is explored via a simple example.
Book Synopsis Performance Evaluation and Selection of Rotary Drilling Bits by : Matthew Farrelly
Download or read book Performance Evaluation and Selection of Rotary Drilling Bits written by Matthew Farrelly and published by . This book was released on 1988 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energy: a Continuing Bibliography with Indexes by :
Download or read book Energy: a Continuing Bibliography with Indexes written by and published by . This book was released on 1978 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1971 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Development of a Test Procedure for the Evaluation of Diamond Drill Bit Performance by : Mark R. B. Sykes
Download or read book A Development of a Test Procedure for the Evaluation of Diamond Drill Bit Performance written by Mark R. B. Sykes and published by . This book was released on 1991 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Rock Mass Classification by : R K Goel
Download or read book Engineering Rock Mass Classification written by R K Goel and published by Elsevier. This book was released on 2011-08-09 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock mass classification methods are commonly used at the preliminary design stages of a construction project when there is very little information. It forms the bases for design and estimation of the required amount and type of rock support and groundwater control measures. Encompassing nearly all aspects of rock mass classifications in detail, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers and managers with extensive practical knowledge which is time-tested in the projects in Himalaya and other parts of the world in complex geological conditions. Rock mass classification is an essential element of feasibility studies for any near surface construction project prior to any excavation or disturbances made to earth. Written by an author team with over 50 years of experience in some of the most difficult mining regions of the world, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers, construction managers and mining engineers with the tools and methods to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. The goal is to use effective mapping techniques to obtain data can be used as input for any of the established rock classification systems. The book covers all of the commonly used classification methods including: Barton's Q and Q' systems, Bieniawski's RMR, Laubscher's MRMR and Hoek's and GSI systems. With this book in hand, engineers will be able to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. Rich with international case studies and worked out equations, the focus of the book is on the practical gathering information for purposes of analysis and design. - Identify the most significant parameters influencing the behaviour of a rock mass - Divide a particular rock mass formulation into groups of similar behaviour, rock mass classes of varying quality - Provide a basis of understanding the characteristics of each rock mass class - Relate the experience of rock conditions at one site to the conditions and experience encountered at others - Derive quantitative data and guidelines for engineering design - Provide common basis for communication between engineers and geologists
Book Synopsis Evaluation of New Methods for Processing Drilling Data to Determine the Cause of Changes in Bit Performance by : Jaime Solano
Download or read book Evaluation of New Methods for Processing Drilling Data to Determine the Cause of Changes in Bit Performance written by Jaime Solano and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Future Drilling Research by : Bernt Sigve Aadnoey
Download or read book Future Drilling Research written by Bernt Sigve Aadnoey and published by . This book was released on 1991 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transactions of the Society of Petroleum Engineers by :
Download or read book Transactions of the Society of Petroleum Engineers written by and published by . This book was released on 1994 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
