Patent ID: 6401845
Filing Date: 2002-06-11
Classification: E21B

Abstract:
A cutter including major front and back flat surfaces and a longitudinal axis where at least a portion of said front surface defines cutter face, said cutter comprising:a disc shaped body including said back surface, an opposing interface surface, and a periphery, where said interface includes a first planar surface which is radially bordered by a groove which is defined by an upper and lower inner boundary and the periphery, where the uninterrupted trace from the upper to the lower inner boundary defines an inwardly extending arcuate surface along at least a portion of its length; and a superabrasive material bonded to said body at said interface to create a uniform cutting surface on said front face such that said the radial periphery defines a greater thickness of said superabrasive material than does the planar surface, when viewed along the longitudinal axis.