Patent ID: 8881851

Claim:
A bit for drilling subterranean formations comprising a body and a number of wear elements operatively connected thereto, wherein each wear element comprises: a diamond body comprising: a first phase comprising an intercrystalline diamond-to-diamond bonded matrix extending throughout the diamond body; and a second phase comprising a reaction product formed between a binder/catalyst material used to facilitate diamond-to-diamond bonding, and a material that is reactive with the binder/catalyst material, the reaction product being disposed within interstitial regions within the intercrystalline bonded diamond matrix; wherein the second phase is substantially free of the binder/catalyst material after the reaction; wherein the binder/catalyst material is cobalt; and a metallic substrate in direct contact with the diamond body wherein the diamond body includes a first region comprising the catalyst/binder material and a second region comprising the reaction product, wherein the first region is substantially free of the reaction product, and wherein the second region is positioned along a wear surface of the wear element.