Cutter having shaped working surface with varying edge chamfer

Details Cutter having shaped working surface with varying edge chamfer Cutter having shaped working surface with varying edge chamfer

2010-05-28

2011-10-18

Stephenson, Daniel P (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S426000

Reexamination Certificate

active

08037951

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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