Patent ID: 6026919
Filing Date: 2000-02-22
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 a cutter face, said cutter comprising:a disc shaped body including said back surface, an opposing interface surface, and a periphery, where said interface surface includes a first outer groove defining said periphery and one or more inner concentric grooves bounded by a series of concentric ridges and by said first outer groove, where said outer and inner concentric grooves and ridges are interrupted by a series of ridges radially disposed about said interface; anda superabrasive material bonded to said body at said interface to create a uniform cutting surface on said front face such that said outer and inner grooves have a depth which defines a greater thickness of said superabrasive material, when viewed along the longitudinal axis.