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:
Jul. 02, 1991
Filed:
Apr. 12, 1990
Applicant:
Inventor:
Quan V Nguyen, Spring, TX (US);
Assignee:
Smith International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175336 ; 175341 ; 175353 ; 175410 ;
Abstract
The inserts for a roller cone of a multiple cone rock bit are positioned or angled in the cone to attack an earthen formation such that the inserts are subjected to more compressive forces and the formation is subjected to more shear forces as the roller cutters roll over the bottom of the formation.