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:
Jan. 22, 1991
Filed:
Apr. 16, 1990
Applicant:
Inventors:
Stephen A Cromar, Aberdeen, GB;
Gavin T Reilly, Portlethen, GB;
Assignee:
Vetco Gray Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166340 ; 166 775 ; 166365 ; 166377 ; 285 39 ;
Abstract
A torque tool and mating profile allow large diameter conductor pipe to easily be retrieved from a subsea well. The profile will be located near the sea floor immediately above a left-hand threaded connector joint. The profile has a lifting shoulder and a torque key. The torque tool lowers through the conductor pipe from the drill rig on drill pipe. It has spring biased dogs that spring outward into the profile. The dogs have lifting surfaces for lifting the conductor string at the lifting shoulder at the profile. Rotating the torque tool causes it to engage the torque key to break out the connector joint.