Patent ID: 6009963
Filing Date: 2000-01-04
Classification: E21B

Abstract:
A cutter for use on a rotary drag bit for earth boring, comprising:a substrate having a front and a rear, taken in a direction of intended cutter movement;a superabrasive table of a first material carried on said front of said substrate and defining a substantially planar cutting face having a cutting edge and having a trailing face; anda plurality of superabrasive pilings of a second material exhibiting at least a different abrasion-resistance than said first material, each superabrasive piling having a longitudinal axis, a distal and a proximal end, disposed in said substrate, said distal ends of said superabrasive pilings extending away from said superabrasive table into said substrate and at least one of said plurality of superabrasive pilings extending to the rear of said substrate, said superabrasive pilings lying in substantially perpendicular arrangement to an orientation of said substantially planar cutting face.