Multi profile performance enhancing centric bit and method of bit design
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United States of America Patent
Stats
-
May 4, 2004
Grant Date -
Sep 25, 2003
app pub date -
Mar 25, 2002
filing date -
Mar 25, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A novel drill bit includes a cutting reamer portion that cuts to gage diameter, and a pilot portion that cuts to a radius about 50%-80% of the reamer portion. The pilot portion extends downward from the reamer portion to create a distinct cutting area including pilot. The torque and weight on bit is evenly distributed between said pilot portion and said reamer portion of said drill bit by iterative adjustment of criteria such as backrake, siderake, cutter height, cutter size, and blade spacing.
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