Patent ID: 6009962
Filing Date: 2000-01-04
Classification: E21B

Abstract:
A rotary drill bit, comprising:a bit body having a leading surface formed at least in part from solid infiltrated matrix material, the leading surface including a plurality of lands;a major part of the leading surface being impregnated with a plurality of abrasive particles of super hard material; anda plurality of cutting elements, larger than the abrasive particles, mounted at the leading surface, the plurality of cutting elements having cutting edges formed of super hard material, the cutting edges projecting above the leading surface and being spaced over the leading surface to define a substantially continuous cutting profile, with the cutting elements only being mounted on a minority of the lands, whereby the plurality of cutting elements in combination sweep over substantially all of the bottom of a hole being drilled by the rotary drill bit, during each revolution of the rotary drill bit.