Patent ID: 6739417
Filing Date: 2004-05-25
Classification: E21B

Abstract:
A cutter for use in forming a bore hole in a subterranean formation, comprising:a substrate; a layer of superabrasive material having a cutting surface and secured over an end of the substrate; and an interface between the substrate and the layer of superabrasive material, the interface including a protrusive portion comprising at least one protrusive, generally annular member enclosing a generally central region of the interface, at least a portion of the generally central region of the interface being disposed at a different elevation than the at least one protrusive, generally annular member, and at least three protrusive, generally radially extending members, each intersecting the at least one protrusive, generally annular member at a radially inner extent thereof and extending to an outer periphery of the cutter at a radially outer extent thereof.