RESEARCH PAPERS: Drilling Mechanics

Wear Characteristics of Polycrystalline Diamond Compact Drill Bits in Small Diameter Rock Drilling

[+] 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 and CAD/CAM Centre, Technical University of Nova Scotia, Halifax, Nova Scotia, Canada

J. Energy Resour. Technol 107(4), 534-542 (Dec 01, 1985) (9 pages) doi:10.1115/1.3231231 History: Received February 17, 1984; Revised August 26, 1985; Online October 22, 2009


The wear characteristics of polycrystalline diamond compact (PDC) drill bits were investigated in the context of drilling small holes in a hard abrasive medium. An efficient method for measuring wear of the PDC drill bits was developed. The wear test results were grouped or categorized in terms of rotary speed, feed and wear or failure characteristics. Contrary to the three classical wear phases (break-in, uniform wear and rapid breakdown) of the single material cutters, four distinctive wear phases were formed for the PDC cutters: I–break-in, II–diamond wear, III–carbide wear, and IV–rapid breakdown. The characteristics of the wear phases were identified and some suggestions were made to alleviate the wear problem.

Copyright © 1985 by ASME
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