The objective of this study is to develop an analytical method for the optimization of the design of the coring bits of vibratory drills with cutting teeth that percussively penetrate into brittle material. This optimization is intended to improve the drill rate of the Ultrasonic Driller and Corer (USDC) that was developed by scientists from JPL and engineers from Cybersonics, Inc. The USDC was developed for possible in-situ sample and other extraterrestrial applications in future NASA missions. A theoretical investigation was undertaken to study the rock-bit penetration characteristics and derive the analytical formulation of the specific energy for a coring bit with wedge-shape cutting teeth, based on two analytical models from rock fracture mechanics. It was found that there exists an optimal spacing/depth ratio for the cutting teeth, and the optimal number of cutting teeth on the bottom annulus of the coring bit can be designed to achieve a minimum total coring bit specific energy. Experimental tests were performed to corroborate the analytical results. It was shown that the laboratory drilling tests follow the trend predicted by the theoretical analysis. The methodology developed here can be used for the optimization of any coring/drill bit with a wedge-shape cutting teeth array in percussive/vibratory drills into brittle material.
Skip Nav Destination
ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 24–28, 2005
Long Beach, California, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4744-6
PROCEEDINGS PAPER
Optimal Design of the Coring Bit Cutting Edge in Percussive/Vibratory Drilling
Yinghui Liu,
Yinghui Liu
Northeastern University, Boston, MA
Search for other works by this author on:
Constantinos Mavroidis,
Constantinos Mavroidis
Northeastern University, Boston, MA
Search for other works by this author on:
Yoseph Bar-Cohen,
Yoseph Bar-Cohen
California Institute of Technology, Pasadena, CA
Search for other works by this author on:
Zensheu Chang
Zensheu Chang
California Institute of Technology, Pasadena, CA
Search for other works by this author on:
Yinghui Liu
Northeastern University, Boston, MA
Constantinos Mavroidis
Northeastern University, Boston, MA
Yoseph Bar-Cohen
California Institute of Technology, Pasadena, CA
Zensheu Chang
California Institute of Technology, Pasadena, CA
Paper No:
DETC2005-85510, pp. 415-423; 9 pages
Published Online:
June 11, 2008
Citation
Liu, Y, Mavroidis, C, Bar-Cohen, Y, & Chang, Z. "Optimal Design of the Coring Bit Cutting Edge in Percussive/Vibratory Drilling." Proceedings of the ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 7: 29th Mechanisms and Robotics Conference, Parts A and B. Long Beach, California, USA. September 24–28, 2005. pp. 415-423. ASME. https://doi.org/10.1115/DETC2005-85510
Download citation file:
13
Views
Related Proceedings Papers
An Autonomous Surgical Robot Applied in Cochleostomy
IDETC-CIE2007
Related Articles
Analytical and Experimental Study of Determining the Optimal Number of Wedge Shape Cutting Teeth in Coring Bits Used in Percussive Drilling
J. Manuf. Sci. Eng (August,2007)
An Analysis of Noise Characteristics of Drill Bits
J. Energy Resour. Technol (March,2012)
Topology of Spade Drills for Wood Drilling Operations, Part 1: Spade Drill Point Geometry Definition
J. Manuf. Sci. Eng (May,2005)
Related Chapters
Study on Screw Drill Wear When Drilling Low Carbon Stainless Steel and Accompanying Phenomena in the Cutting Zone
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)
Drilling Economics
Oilwell Drilling Engineering
Theoretical Analysis and Application of Pile Shaft Resistance Strengthening Effect
International Conference on Optimization Design (ICOD 2010)