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. 13, 1994
Filed:
Sep. 09, 1993
Applicant:
Inventors:
Carl W Keith, Spring, TX (US);
Ed R Martin, Jr, Spring, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175 57 ; 175431 ; 175432 ;
Abstract
A fixed cutting element drill bit is provided with primary cutting elements which are spaced radially from each other across the face of the bit. During drilling, the gap between the cutting elements causes a ridge to be formed in the bottom of the well and the apex of the ridge is removed before reaching the face of the bit. In one form of the invention, the apex is broken off by utilization of the sides of the supports for the primary cutting elements.