Superhard cutting structure having reduced surface roughness and bit for subterranean drilling so equipped
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 14, 2000
Issued Date -
N/A
app pub date -
Oct 6, 1999
filing date -
Nov 22, 1993
priority date (Note) -
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Abstract
A superhard cutting element having a polished, low friction, substantially planar cutting face with a surface finish roughness of 10 .mu.in. or less and preferably 0.5 .mu.in. or less. A chamfered cutting edge and side surface of the superhard material table of the same surface finish roughness are also disclosed. The surface roughness of the aforementioned superhard material table portions may be reduced by mechanically smoothing and polishing according to one of several variations of the method of the invention.
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