Patent ID: 9488011
Filing Date: 2016-11-08
CPC Classification: B22F,B24D,C22C,E21B

Claim Text:
1. A method of manufacturing a polycrystalline diamond (PCD) cutting element comprising: identifying a portion of a cutting surface of a PCD body in a PCD cutting element as a cutting area which, during use of the PCD cutting element, is heated by a cutting action of the cutting element; leaching the PCD body to remove substantially all of a binder-catalyzing material from the cutting area to a first depth; and leaching the PCD body to remove substantially all of the binder-catalyzing material from at least a portion of the cutting surface surrounding the cutting area to a second depth, wherein the first depth is greater than the second depth, and wherein the PCD body is substantially cylindrical and no leaching occurs at a portion of the cutting surface central to a cylindrical axis of the PCD body.