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:
Apr. 03, 2012
Filed:
May. 14, 2009
Steven C. Ellis, The Woodlands, TX (US);
Javier Garcia, Jr., Tomball, TX (US);
Rick C. Hunter, Friendswood, TX (US);
John E. Nelson, Houston, TX (US);
Steven C. Ellis, The Woodlands, TX (US);
Javier Garcia, Jr., Tomball, TX (US);
Rick C. Hunter, Friendswood, TX (US);
John E. Nelson, Houston, TX (US);
Vetco Gray Inc., Houston, TX (US);
Abstract
A wellhead seal assembly forms a metal-to-metal seal between inner and outer wellhead members. A metal seal ring has inner and outer walls separated by a slot. A lock ring has grooves for locking the inner wellhead member to the outer wellhead member during installation. An energizing ring has a C-ring captured on its inner surface. When the energizing ring is moved further into the slot, the C-ring is forced from its pocket and engages the surface of the inner wellhead member, locking the seal assembly to the inner wellhead member.