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:
Sep. 07, 1999
Filed:
Nov. 24, 1997
Applicant:
Inventors:
David Truax, Houston, TX (US);
Ghanshyam Rai, The Woodlands, TX (US);
Stephen G Southland, Spring, TX (US);
Gary R Portwood, Kingwood, TX (US);
Assignee:
Smith International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175432 ;
Abstract
A synthetic diamond cutter is disclosed for rock bits having a diamond cutting face at one end of a body supporting the cutting face. A heel portion is formed by the body near the diamond cutting face. The heel portion forms a groove depression or notch about adjacent to a cutting tip of the diamond cutting face. The cutting tip, as a result of the groove, results in a greater rate of penetration of the diamond cutting face due to a reduction of drag as the cutter works in an earthen formation or against a suitable workpiece.