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:
May. 13, 2014
Filed:
Jun. 30, 2011
Khanh Anh Duong, Sugar Land, TX (US);
Khanh Anh Duong, Sugar Land, TX (US);
Vetco Gray Inc., Houston, TX (US);
Abstract
A casing hanger seal assembly is lowered into a pocket between a casing hanger and a wellhead housing while in a run-in position. The seal assembly has a metal-to-metal upper seal ring and an elastomeric and metal lower seal ring carried by and below the upper seal ring. The upper and lower seal rings are movable from a run-in position to a set position sealing between the sidewalls of the casing hanger and the wellhead housing by applying a downward force. The downward force required to move the lower seal ring to the set position is less than the downward force required to move the upper seal ring to the set position. A downward force applied to the upper seal ring after the lower seal ring has landed in the pocket transfers to the lower seal ring to cause the lower seal ring to move to the set position before the upper seal ring moves to the set position.