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:
Jun. 21, 1977
Filed:
Jul. 28, 1975
Applicant:
Inventors:
Jerry L Rogers, New Orleans, LA (US);
Chudleigh B Cochran, Houston, TX (US);
Assignee:
Brown Oil Tools, Inc., Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166208 ; 166177 ; 308-9 ;
Abstract
Disclosed is a swivel assembly with multiple fluid bearings. The embodiment shown is a rotatable liner swivel assembly to be used, in conjunction with a liner hanger, cam dog assembly, and setting tool, for placing and cementing a liner in a well. Fluid-filled annular bearing chambers in the swivel assembly support the load of the liner pipe string, and permit the rotation of the liner pipe string with respect to the liner hanger during the cementing process. The bearing chambers are interconnected to equalize the fluid pressure and distribute the load uniformly over the bearing chambers.