Smith International, Inc.

Schlumberger Technology Corporation

Christopher A Tucker

J Daniel Belnap

Ronald K Eyre

Lynn L Belnap

Ronald B Crockett

Xiaoge Gan

Yi Fang

Venkatesh Karuppiah

Haibo Zhang

Anjie Dong

Aaron Madsen

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 adjacent a cutting tip that are raised above the concavity of the cutting face and having a length that is at least about 10% of a diameter of the cutting face. An edge is formed around a perimeter of the cutting face, and the edge has an edge angle defined between a tangent of the cutting face and a cylindrical side surface of the body, the edge angle being acute at the cutting tip and varying around the perimeter of the cutting face.

Polycrystalline diamond cutting element having improved cutting efficiency

A drill bit including at least one stress-relieved cutting element, wherein the at least one cutting element is mounted on the drill bit, wherein the stress-relieved cutting element includes a substrate, at least one transition layer disposed upon the substrate and a polycrystalline diamond layer having a thickness of at least 0.008 inches disposed upon the at least one transition layer.

Stress-relieved diamond inserts

Cutting elements for incorporation in a drill bit are provided having a body and an ultra hard material cutting layer over an end face of the body. A plurality of abutting shallow depressions are formed on the end face of the body. A transition layer may be incorporated between the body and the ultra hard material layer. The transition layer preferably has material properties intermediate between the properties of the body and the ultra hard material layer.

Cutting elements with interface having multiple abutting depressions

Growing community of inventors

Provo, UT, United States of America

Christopher A Tucker