The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2009
Filed:
Jun. 05, 2003
Saul N. Izaguirre, Spring, TX (US);
Thomas W. Oldham, The Woodlands, TX (US);
Kumar T. Kembaiyan, The Woodlands, TX (US);
Gary R. Chunn, Conroe, TX (US);
Anthony Griffo, The Woodlands, TX (US);
Robert Denton, Pearland, TX (US);
Brian White, The Woodlands, TX (US);
Saul N. Izaguirre, Spring, TX (US);
Thomas W. Oldham, The Woodlands, TX (US);
Kumar T. Kembaiyan, The Woodlands, TX (US);
Gary R. Chunn, Conroe, TX (US);
Anthony Griffo, The Woodlands, TX (US);
Robert Denton, Pearland, TX (US);
Brian White, The Woodlands, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket. The method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder. The mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body. When the solid bit body is removed from the mold, pockets are formed by the displacements in the bit body and are lined with the layer of superabrasive-free matrix material. The superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiBin exemplary embodiments.