Cutter having shaped working surface with varying edge chamfer
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United States of America Patent
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Jun 1, 2010
Grant Date -
Nov 10, 2005
app pub date -
Apr 28, 2005
filing date -
Apr 30, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A cutter for a drill bit used for drilling wells in a geological formation includes an ultra hard working surface and a chamfer along an edge of the working surface, wherein the chamfer has a varied geometry along the edge. The average geometry of the chamfer varies with cutting depth. A depression in the shaped working surface is oriented with the varied chamfer and facilitates forming the varied chamfer. A non-planar interface has depressions oriented with depressions in the shaped working surface to provide support to loads on the working surface of the cutter when used.
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