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. 09, 1999
Filed:
Jul. 11, 1997
Applicant:
Inventor:
Stephen R Jurewicz, Los Angeles, CA (US);
Assignee:
U.S. Synthetic Corporation, Oreur, UT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175434 ; 175428 ;
Abstract
A cutting element is provided for use with drill used in the drilling and boring through subterranean formations. This new cutter has improved wear characteristics while maximizing the manufacturability and cost effectiveness of the cutter. This invention accomplishes these objectives by incorporating a single chamfer of increased size. This chamfer is introduced on the periphery of the abrasive cutting face of the cutter. This chamfer has been found to reduce the tensile stress within the cutter, which tensile stress is primarily responsible for spalling and delamination of the abrasive layer of the cutter.