Patent ID: 7717199
Filing Date: 2010-05-18
Classification: E21B,Y10T

Abstract:
1. A cutting element comprising: a substrate having an interface surface and a periphery; an interior groove formed on said interface surface defining a polygon in plan view, said interior groove comprising a plurality of generally liner sections, each section defining a side of said polygon, said polygon having a plurality of vertices, wherein each vertex of said plurality of vertices is defined at an intersection between consecutive sections, wherein an interior land is defined within said interior groove and surrounded by said interior groove; a plurality of radial grooves formed on said interface surface, each radial groove extending from a separate one of said vertices to the periphery, wherein a radial groove extends from each vertex, wherein a plurality of generally trapezoidal lands are defined on said interface surface, wherein each of said generally trapezoidal lands is bounded by one of said radial grooves on a first side and by another of said radial grooves on a second side opposite the first side, wherein each of said generally trapezoidal lands extends from the interior groove to the periphery, wherein each of said generally trapezoidal lands comprises a narrower side opposite a wider side wider than the narrower side, wherein the narrower side is defined by said interior groove and wherein the wider side faces the periphery; and an ultra hard material layer formed over the interface surface.