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:
Feb. 02, 1988
Filed:
Oct. 01, 1986
Applicant:
Inventor:
James W Langford, Jr, Red Oak, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175374 ; 175410 ; 75242 ; 7610 / ; 76DI / ;
Abstract
A composite sintered rock bit insert for use in a rolling cutter is fabricated from two tungsten carbide components. The first component is formed of a tungsten carbide composite that is less wear resistant, but tougher, than the second component. The two components are joined at a parting plane which extends to an earth-engaging surface of the insert. The insert is mounted on a rolling cutter such that the component having the lower wear resistant properties is on the leading face of the insert. With this combination, the wear pattern of the insert maintains a crest-like configuration at its rock engaging surface.