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. 03, 2002
Filed:
Oct. 25, 2000
Eugene A. Borak, Jr., Cypress, TX (US);
ABB Vetco Gray Inc., Houston, TX (US);
Abstract
A casing hanger lands on a load shoulder in a wellhead to seal and support a string of casing. The casing hanger has a lower ring for landing on the load shoulder, the lower ring having an upward facing surface. A plurality of circumferentially spaced recesses are in the upward facing surface of the lower ring, each of the recesses having a base. A seal is located on the lower ring and has a plurality of holes that register with the recesses in the upward facing surface of the lower ring. A slip assembly bowl has a wedging surface that carries a plurality of slip members. The slip members grip the casing and cause the bowl to transmit downward forces from the casing to the seal to axially compress and energize the seal. Fasteners extend from the lower ring through apertures provided in the seal into threaded apertures provided in a downward facing surface of the bowl to secure the lower ring to the slip assembly but allow relative axial movement between the bowl and the lower ring. A plurality of substantially cylindrical stop members are located in the holes in the seal and in the recesses of the lower ring. The stop members are secured into threaded holes formed in the shoulder ring and contact the bases of the recesses to limit the compression of the seal to a predetermined amount.