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Drill Bit Performance Evaluation For Potential Martian Rock Types In Support Of Future Martian Subsurface Exploration
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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 Dynamic and Contact Analysis of a Special Percussive Drill for Planetary Subsurface Exploration by : Luis J. Vila
Download or read book Dynamic and Contact Analysis of a Special Percussive Drill for Planetary Subsurface Exploration written by Luis J. Vila and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Planetary drilling is a vital task in the challenge for space exploration. Drilling and planetary soil/rock sample acquisition provides information about history of past events, minerals and chemical composition of the soil/rock of the planetary body, available resources for future manned missions and the mechanical behavior of the planetary soil/rock. Several types of drilling devices have been proposed for lunar, Mars, and planetary subsurface exploration. However, these devices have limitations (e.g. heavy equipment and need for large axial force) that need to be addressed in order to be feasible for extraterrestrial bodies’ exploration. A special type of ultrasonic percussive drill have been proposed by Honeybee Spacecraft Mechanisms Corporation and NASA Jet Propulsion Laboratory (JPL) to address the limitations of current drilling devices. In this study, the mechanical system of the ultrasonic percussive drill and its interaction with the supporting medium is studied. The percussive mechanism consists of an ultrasonic horn, a free mass, and the drill rod. Special attention is given to the impact between the free mass and the drill rod, including the effects of structural damping, the supporting medium of the rod, plastic deformation in the contact area, and repeated impacts of the free mass on the drill rod. A general methodology to analyze the impact of the free mass on the drill rod, analogous to the longitudinal impact of a mass on a rod, is developed. The methodology involves uncoupling the nonlinear problem by determining the response of each body independently under the contact force to find the local indentation, then using Hertz force-indentation relation to find the contact force. This method is applied using mode superposition method and finite element technique for various support conditions of the rod (e.g. rigid, elastic, free, viscoelastic). Additionally, a model to account for drill rod penetration into the supporting medium due to impact of the free mass is also presented. It was found that for an undamped rod, the support condition of the rod does not affect the contact force if the contact ends before the arrival of the reflected wave to the point of contact. It was also observed that the contact force due to impact, for a given support condition, increases with increasing damping of the rod. Moreover, a modified Hertz equation is introduced to include plastic deformation on the rod due to impact of the free mass. The study was performed for identical repetitive impacts and it was found that the largest plastic deformation occurs in the first impact, with additional plastic deformation decreasing with the increasing number of impacts. The dynamic response of the overall percussive drill was investigated with a finite element model, including the interaction of the free mass with the ultrasonic horn and the drill rod. A numerical example indicated that the dynamic response of the ultrasonic drill is directly affected by the supporting medium. It was found that system with fixed support experienced a higher frequency of oscillation of the free mass and higher impact force compared to the system with the elastic support and the model accounting for penetration into the supporting medium.
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 Advances in Extraterrestrial Drilling: by : Yoseph Bar-Cohen
Download or read book Advances in Extraterrestrial Drilling: written by Yoseph Bar-Cohen and published by CRC Press. This book was released on 2020-12-23 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Extraterrestrial Drilling: Ground, Ice, and Underwater includes the latest advances that have been made in recent years in developing drilling and excavation mechanisms for extraterrestrial bodies. The chapters cover drill types, drilling techniques and their advantages and associated issues, rock coring including acquisition, damage control, caching and transport, and data interpretation, as well as unconsolidated soil drilling and borehole stability. This book includes a description of the basic science of the drilling process, associated processes of breaking and penetrating various media, the required hardware, and the process of excavation and analysis of the sampled media. Covers the most recent advances in extraterrestrial drilling. Discusses drilling in the broadest range of media including ground, ice, underwater, and planetary surfaces from shallow to very deep. Provides a comprehensive description of key drilling techniques and the efforts to develop unified approach to assessing the required tools for given drilling requirements. Discusses how environment affects drilling and approaches to addressing the effects and current challenges of drilling and excavation on other planets. Examines novel drilling and excavation approaches. Dr. Yoseph Bar-Cohen is the Supervisor of the Electroactive Technologies Group (http://ndeaa.jpl.nasa.gov/) and a Senior Research Scientist at the Jet Propulsion Lab/Caltech, Pasadena, CA. His research is focused on electro-mechanics including planetary sample handling mechanisms, novel actuators that are driven by materials such as piezoelectric and EAP (also known as artificial muscles), and biomimetics. Dr. Kris Zacny is a Senior Scientist and Vice President of Exploration Systems at Honeybee Robotics, Altadena, CA. His expertise includes space mining, sample handling, soil and rock mechanics, extraterrestrial drilling, and In Situ Resource Utilization (ISRU).
Book Synopsis Evaluation of Several Auger Bits in Frozen Fine-grained Soils, Asphalt, and Concrete by : Paul V. Sellmann
Download or read book Evaluation of Several Auger Bits in Frozen Fine-grained Soils, Asphalt, and Concrete written by Paul V. Sellmann and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Drilling in Extreme Environments by : Yoseph Bar-Cohen
Download or read book Drilling in Extreme Environments written by Yoseph Bar-Cohen and published by John Wiley & Sons. This book was released on 2009-08-04 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uniquely comprehensive and up to date, this book covers terrestrial as well as extraterrestrial drilling and excavation, combining the technology of drilling with the state of the art in robotics. The authors come from industry and top ranking public and corporate research institutions and provide here real-life examples, problems, solutions and case studies, backed by color photographs throughout. The result is a must-have for oil companies and all scientists involved in planetary research with robotic probes. With a foreword by Harrison "Jack" Schmitt -- the first geologist to drill on the moon.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1970-12 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Book Synopsis Mars Science Laboratory by : John Grotzinger
Download or read book Mars Science Laboratory written by John Grotzinger and published by Springer. This book was released on 2012-12-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mars Science Laboratory is the latest and most advanced NASA roving vehicle to explore the surface of Mars. The Curiosity rover has landed in Gale crater and will explore this region assessing conditions on the surface that might be hospitable to life and paving the way for later even more sophisticated exploration of the surface. This book describes the mission, its exploration and scientific objectives, studies leading to the design of the mission and the instruments that accomplish the objectives of the mission. This book is aimed at all those engaged in Martian studies as well as those interested in the origin of life in other environments. It will be a valuable reference for anyone who uses data from the Mars Science Laboratory. Previously published in Space Science Reviews journal, Vol. 170/1-4, 2012.
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 Lunar Drilling Technology for Terrestrial Applications by : Raymond E. Aufmuth
Download or read book Evaluation of Lunar Drilling Technology for Terrestrial Applications written by Raymond E. Aufmuth and published by . This book was released on 1973 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents results of a laboratory evaluation of a NASA-developed drill system for obtaining test core samples of concrete, rock, and soil materials for nondestructive testing. Excellent test cores from a variety of materials were obtained at drilling rates greater than normally achieved with conventional systems. Additional tests are required to assess the cost effectiveness of the system. (Author).
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 Volatiles in the Martian Crust by : Justin Filiberto
Download or read book Volatiles in the Martian Crust written by Justin Filiberto and published by Elsevier. This book was released on 2018-08-30 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volatiles in the Martian Crust is a vital reference for future missions - including ESA's EXO Mars and NASA's Mars2020 rover - looking for evidence of life on Mars and the potential for habitability and human exploration of the Martian crust. Mars science is a rapidly evolving topic with new data returned from the planet on a daily basis. The book presents chapters written by well-established experts who currently focus on the topic, providing the reader with a fresh, up-to-date and accurate view. Organized into two main sections, the first half of the book focuses on the Martian meteorites and specific volatile elements. The second half of the book explores processes and locations on the crust, including what we have learned about volatile mobility in the Martian crust. Coverage includes data from orbiter and in situ rovers and landers, geochemical and geophysical modeling, and combined data from the SNC meteorites. - Presents information about the nature, relationship, and reactivity of chemical elements and compounds on Mars - Explores the potential habitability of Mars - Provides a comprehensive view of volatiles in the Martian crust from studies of actual samples as well as from the variety of landed missions, including the MER and Curiosity rovers - Delivers a vital reference for ongoing and future missions to Mars while synthesizing large data sets and research on volatiles in the Martian atmosphere - Concludes with an informative summary chapter that looks to future Mars missions and what might be learned
Book Synopsis Mars: An Introduction to its Interior, Surface and Atmosphere by : Nadine Barlow
Download or read book Mars: An Introduction to its Interior, Surface and Atmosphere written by Nadine Barlow and published by Cambridge University Press. This book was released on 2014-05-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our knowledge of Mars has changed dramatically in the past 40 years due to the wealth of information provided by Earth-based and orbiting telescopes, and spacecraft investigations. Recent observations suggest that water has played a major role in the climatic and geologic history of the planet. This textbook covers our understanding of the planet's formation, geology, atmosphere, interior, surface properties, and potential for life. This interdisciplinary textbook encompasses the fields of geology, chemistry, atmospheric sciences, geophysics, and astronomy. Each chapter introduces the necessary background information to help the non-specialist understand the topics explored. It includes results from missions through 2006, including the latest insights from Mars Express and the Mars Exploration Rovers. Containing the most up-to-date information on Mars, this textbook is essential reading for graduate courses, and an important reference for researchers.
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:
Book Synopsis An Investigation Into the Percussive Drill Bit Penetration of Rock by : M. K. B. Shahrom
Download or read book An Investigation Into the Percussive Drill Bit Penetration of Rock written by M. K. B. Shahrom and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalog of Lunar and Mars Science Payloads by : Nancy Ann Budden
Download or read book Catalog of Lunar and Mars Science Payloads written by Nancy Ann Budden and published by . This book was released on 1994 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis KWIC Index of Rock Mechanics Literature by : J P Jenkins
Download or read book KWIC Index of Rock Mechanics Literature written by J P Jenkins and published by Elsevier. This book was released on 2016-06-03 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: KWIC Index of Rock Mechanics Literature, Part 2: 1969-1976 is an index of subjects in rock mechanics. The KWIC (keyword-in-context) index is produced by cyclic permutation of significant words in the title of the publication. The text covers materials in rock mechanics and geomechanics published around the 70s. The book will be of great use to students, researchers, and practitioners of geological sciences.
