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:
Nov. 29, 2011
Filed:
Apr. 27, 2009
Applicants:
Keith D. Farquharson, Edmonton, CA;
Tianle Guo, Edmonton, CA;
Heinrich Lang, The Woodlands, TX (US);
Tony Lam, Edmonton, CA;
Kevin Paul Schneider, Nisku, CA;
Inventors:
Keith D. Farquharson, Edmonton, CA;
Tianle Guo, Edmonton, CA;
Heinrich Lang, The Woodlands, TX (US);
Tony Lam, Edmonton, CA;
Kevin Paul Schneider, Nisku, CA;
Assignee:
Stream-Flo Industries Ltd., Edmonton, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A reusable metal seal for a wellhead provides a metal-to-metal seal and includes upper and lower tapered sealing flanks which may be deflected by tapered wall surfaces on the wellhead engaging the taper sealing flanks, and the seal may have a plurality of annular relief grooves.