Patent ID: 9056799
Filing Date: 2015-06-16
Classification: C04B,C22C

Abstract:
1. A matrix bit body for a drill bit for oil and gas drilling wherein at least a portion of a surface thereof comprises a composite material comprising: a matrix powder system comprising one or more polycrystalline carbides, binderless carbides or a combination thereof dispersed in a metal bond phase; and wherein a bulk of the matrix bit body comprises a matrix powder system dispersed in a metal bond phase, the bulk matrix powder system comprising one or more polycrystalline carbides, binderless carbides or combinations thereof or the bulk matrix powder system comprising cast tungsten carbide, macrocrystalline tungsten carbide, sintered tungsten carbide, agglomerate carburized tungsten carbide, refractory metal borides or combinations thereof, wherein the binderless carbides of the composite material contain less than 0.5 wt. % binder; and wherein the composite material or the bulk matrix powder system or both comprises the binderless carbide wherein the binderless carbide contains tungsten and is a two phase carbide comprising up to 10 wt. % ditungsten carbide.