Rotary drill bit
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United States of America Patent
Stats
-
Dec 20, 1988
Grant Date -
N/A
app pub date -
Feb 9, 1987
filing date -
Mar 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary drill bit is provided with a plurality of cutting elements having a front layer of abrasive particles, wherein the cutting elements located in the center region of the bit comprise a thicker abrasive front layer than those in the outer region of the bit. The bit design enables optimization of drilling characteristics.
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