Patent ID: 8499860

Claim:
A shear cutter type cutting element comprising: a substrate for mounting on a drag bit; and an ultra hard material cutting layer over the substrate, said cutting layer comprising a surface portion for making contact with a material to be cut by said cutting element, said surface portion in cross-section having a varying curvature that is formed by a plurality of non-flat adjacent sections, each section having a different radius of curvature than its adjacent section, wherein the surface portion in cross-section comprises a first section adjacent to a second section which is adjacent a third section, wherein the first section comprises a first radius of curvature, wherein the second section comprises a second radius of curvature, wherein the third section comprises a third radius of curvature, wherein the second radius of curvature is greater than the first radius of curvature, and wherein the third radius of curvature is greater than the first radius of curvature.