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. 10, 1987
Filed:
Sep. 06, 1985
William D Wightman, Houston, TX (US);
Hughes Tool Company, Houston, TX (US);
Abstract
A subsea well assembly has a casing hanger that lands inside the wellhead with a locking device to lock the hanger in the wellhead. The locking device includes a collar mounted to the hanger body and movable relative to the body between a lower storage position and an upper set position. The collar contacts a landing shoulder located in the wellhead to move to the set position. Washers located between the collar and the hanger body allow the hanger body to move downward when the collar contacts the landing shoulder. The washers deflect downwardly due to interference fit when the hanger moves to the set position to resist upward movement. As the hanger body moves downward, a split ring is pushed outwardly by inclined surfaces to engage locking grooves formed in the interior of the wellhead for supporting the casing hanger.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile