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:
Nov. 26, 2002
Filed:
Nov. 07, 2000
Nathan R. Anderson, Pleasant Grove, UT (US);
J. Daniel Belnap, Pleasant Grove, UT (US);
Chris E. Cawthorne, The Woodlands, TX (US);
Ronald K. Eyre, Orem, UT (US);
Madapusi K. Keshavan, Sandy, UT (US);
Per I. Nese, Houston, TX (US);
Michael A. Siracki, The Woodlands, TX (US);
Gary R. Portwood, Kingwood, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
Enhanced inserts are formed having a cylindrical grip and a protrusion extending from the grip. An ultra hard material layer is bonded on top of the protrusion. The inserts are mounted on a rock bit and contact the earth formations off center. The ultra hard material layer is thickest at a critical zone which encompasses a major portion of the region of contact between the insert and the earth formation. Transition layers may also be formed between the ultra hard material layer and the protrusion so as to reduce the residual stresses formed on the interface between the ultra hard material and the protrusion.