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RESEARCH PAPERS

Life Models for Small-Diameter Polycrystalline Diamond Compact Bits in Hard Abrasive Media

[+] Author and Article Information
C. L. Hough

Department of Mechanical Engineering, Texas A & M University, College Station, Tex. 77843

B. Das

Department of Industrial Engineering, Technical University of Nova Scotia, Halifax, Nova Scotia, Canada

T. G. Rozgonyi

Department of Mining Engineering, Texas A & M University, College Station, Tex. 77843

J. Energy Resour. Technol 108(4), 310-314 (Dec 01, 1986) (5 pages) doi:10.1115/1.3231282 History: Received June 04, 1985; Revised August 01, 1986; Online October 22, 2009

Abstract

Mathematical models for bit life of polycrystalline diamond compact (PDC) drill bits were developed for drilling small holes in hard abrasive media. Based on the wear-out criterion of an average 0.060 in. (1.5 mm) flank wear land, bit life equations were formulated in three forms: bit life versus rotary speed and feed rate, bit life versus rotary speed and penetration rate, and wear rate versus cutting speed and cutter engagement area. The traditional linear-logarithmic model proved inadequate to describe bit life, whereas the quadratic-logarithmic model provided the best bit life prediction equation. Consequently, it would be possible to predict the optimum economical drilling conditions more accurately by employing a quadratic-logarithmic based bit life equation. The equation demonstrated the ability to predict the bit life precisely under different modes of wear.

Copyright © 1986 by ASME
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