Polycrystalline diamond cutting element with improved cutting efficiency

A cutting element may include a body, a concave cutting face formed at a first end of the body, the cutting face including one or more cutting ridges proximate to a cutting tip, the cutting ridges protruding above a concave face of the cutting face having a length of at least about 10% of a diameter of the cutting face. A blade is formed around the periphery of the cutting face and has a blade angle defined between a tangent of the cutting face and the cylindrical side surface of the body, the blade angle being acute at the cutting tip and varying around the periphery of the cutting face. 一种切割元件，可包括一主体，形成于主体的第一端处的凹形切割面，该切割面包括一个或多个靠近切割尖端的切割脊，该切割脊凸起到切割面的凹面上方，其长度至少约为切割面的直径的10％。围绕切割面的周边形成刃，并且该刃具有限定在切割面的切线和主体的圆柱形侧表面之间的刃角，该刃角在切割尖端处是锐角并且围绕切割面的周边变化。