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. 17, 1987
Filed:
Nov. 06, 1984
Applicant:
Inventor:
Thomas B Dellinger, Duncanville, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21B / ;
U.S. Cl.
CPC ...
175 61 ; 175 65 ; 175 73 ;
Abstract
A rotary well drilling system employs a drill pipe with a drill bit affixed at its lower end for the drilling of a deviated wellbore. Drilling fluid is circulated through the drill pipe to remove drill cuttings. The drill bit is rotated in the opposite direction from that of the drill pipe to reduce the torque required to rotate the drill pipe as it is rotationally dragged along the lower side of the wellbore walls during the drilling of the deviated wellbore.