Patent ID: 8602132
Filing Date: 2013-12-10
Classification: B01J,B24D,E21B

Abstract:
1. A rotary drill bit for drilling a subterranean formation, comprising: a bit body comprising a leading end having generally radially extending blades structured to facilitate drilling of a subterranean formation; at least one cutting element affixed to the bit body, the at least one cutting element comprising: a substrate; a coherent matrix of polycrystalline diamond defining a superhard table bonded to the substrate; wherein the coherent matrix of polycrystalline diamond includes a plurality of agglomerated granules extending from the substrate to an exposed surface of the superhard table distal of the substrate, at least a majority of the plurality of agglomerated granules being sintered directly to adjacent agglomerated granules to exhibit diamond-to-diamond bonds therebetween, the granules comprising at least two different size diamond particles and binder, wherein the diamond particles have a size of less than about 100 μm.