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. 15, 2014
Filed:
Dec. 29, 2010
Applicants:
Alexander Urquhart, Aberdeen, GB;
William D. Munro, Aberdeen, GB;
Inventors:
Alexander Urquhart, Aberdeen, GB;
William D. Munro, Aberdeen, GB;
Assignee:
Vetco Gray Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/035 (2006.01); E21B 33/043 (2006.01); E21B 34/04 (2006.01); E21B 23/04 (2006.01); E21B 33/134 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pressure mitigating device is used to reduce pressure in a void within a wellhead housing. In one embodiment, the pressure mitigating device includes two plates that define a void between them. Increased pressure in the wellhead housing causes the plates to elastically displace towards each other. The plates contact each other, limiting the displacement prior to plastic deformation.