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:
May. 17, 2005
Filed:
Nov. 13, 2002
Applicant:
Christopher S. Byrd, Dallas, TX (US);
Inventor:
Christopher S. Byrd, Dallas, TX (US);
Assignee:
Varel International, Ltd., Carrollton, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B017/06 ; E21B017/10 ;
U.S. Cl.
CPC ...
Abstract
A drill bit is assembled to the makeup end of a drill string by means of a breakable washer comprising a ring-shaped body having an inner diameter and an outer diameter. A radially extending first surface of the ring-shaped body is planar and substantially perpendicular to a centerline axis through the body. A second radially extending surface has an angle with reference to the first surface that results in a radially diverging configuration.