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:
Dec. 20, 1983
Filed:
Oct. 29, 1981
Applicant:
Inventor:
Edward M Galle, Jr, Houston, TX (US);
Assignee:
Armco Inc., Middletown, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21B / ; F16L / ;
U.S. Cl.
CPC ...
166118 ; 285139 ; 285 18 ;
Abstract
A weight-set pack-off unit for sealing the annulus between inner and outer pipes, such as a mandrel casing hanger and a wellhead body in a well. The pack-off unit includes an expandable split ring receivable in a groove in the outer pipe to prevent upward movement of the pack-off unit relative to the outer pipe. The split ring is supported by a second ring which is shear-pinned to the pack-off unit and which moves the split ring into the locking position. The pack-off unit has a downwardly facing load-bearing shoulder in engagement with an upwardly facing load-bearing shoulder on the inner pipe, thereby increasing the unit's capacity to carry downward loads.