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. 23, 2010
Filed:
Nov. 03, 2007
Applicants:
Lawrence E. Wells, Yorba Linda, CA (US);
Neil Edward West, Corona, CA (US);
Inventors:
Lawrence E. Wells, Yorba Linda, CA (US);
Neil Edward West, Corona, CA (US);
Assignee:
National Oilwell Varco L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 19/16 (2006.01); E21B 3/00 (2006.01); E21B 3/02 (2006.01); B25B 13/34 (2006.01); E21B 31/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A tubular gripping system and a top drive drilling system with such a tubular gripping system, in at least some aspects, the gripping system beneath the top drive unit and, in at least some aspects, the gripping system having a body with four spaced-apart grippers movably connected thereto and piston/cylinder devices movably interconnected with each gripper for moving the grippers to clamp the tubular.