Patent ID: 8499861
Filing Date: 2013-08-06
Classification: C04B,C22C,E21B

Abstract:
1. A bit for drilling subterranean formations comprising a body and a number of cutting elements attached to the body, wherein one or more of the cutting elements comprises an ultra-hard composite construction comprising: an ultra-hard body comprising a plurality of diamond crystals, wherein the ultra-hard body comprises a first region comprising a majority of the diamond crystals bonded to one another via a reaction product that is interposed therebetween and that is formed by reaction of the diamond crystals with a reactant material; a high-density diamond region that is positioned along at least a portion of the ultra-hard body surface and is immediately adjacent the portion of the ultra-hard body, wherein the high-density diamond region is substantially exclusively diamond, is substantially free of the reaction product, and is formed without a second phase material; and a substrate that is attached to the ultra-hard body.