Deviation Forces Arising From Single Bit Tooth Indentation of an Anisotropic Porous Media

[+] Author and Article Information
M. B. Smith, J. B. Cheatham

Rice University, Houston, Texas

J. Pressure Vessel Technol 99(2), 362-366 (May 01, 1977) (5 pages) doi:10.1115/1.3454542 History: Received June 28, 1976; Online October 25, 2010


The effect of formation anisotropy on the hole deviation force acting on a single bit tooth is analyzed for a plastically deforming rock. A yield condition which allows a nonlinear dependence of strength on confining pressure is used in a numerical analysis of the plane strain indentation of a porous rock by a single bit tooth. The hole deviation force was approximately 50 percent of the vertical indentation force for the example calculation.

Copyright © 1977 by ASME
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