US Patent 7661491 High-strength, high-toughness matrix bit bodies

Patent 7661491 was granted and assigned to Smith International on February, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Smith International

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76614910

Patent Inventor Names

Thomas W. Oldham0

Kumar T. Kembaiyan0

Date of Patent

February 16, 2010

Patent Application Number

117646610

Date Filed

June 18, 2007

Patent Primary Examiner

Roy King

Patent abstract

A new composition for forming a matrix body which includes spherical sintered tungsten carbide and an infiltration binder including one or more metals or alloys is disclosed. In some embodiments, the composition may include a Group VIIIB metal selected from one of Ni, Co, Fe, and alloys thereof. Moreover, the composition may also include cast tungsten carbide. In addition, the composition may also include carburized tungsten carbide.