Drill bit having combined positive and negative or neutral rake cutters
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United States of America Patent
Stats
-
May 24, 1994
Grant Date -
N/A
app pub date -
Feb 18, 1992
filing date -
Feb 18, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drill bit, and a cutter for a drill bit, are provided, wherein the cutter will encounter the formation with cutting surfaces of differing rake angles to optimize cutting efficiency. In most circumstances, the cooperating cutters will have differing, positive, and negative or neutral rakes. Cutters of differing rakes may be cooperatively paired on a drill bit such that the portion of a formation which is affected by the action of one cutter may be similarly affected by the operation of the other cutter.
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