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:
Jul. 11, 2006
Filed:
Jan. 05, 2005
Alfred Massie, Aberdeen, GB;
Harry A. Moore, Houston, TX (US);
Richard Lovell, Aberdeen, GB;
Kevin G. Buckle, Aberdeen, GB;
John H. Osborne, Aberdeen, GB;
Alfred Massie, Aberdeen, GB;
Harry A. Moore, Houston, TX (US);
Richard Lovell, Aberdeen, GB;
Kevin G. Buckle, Aberdeen, GB;
John H. Osborne, Aberdeen, GB;
Vetco Gray Inc., Houston, TX (US);
Abstract
A subsea wellhead assembly has the capabilities of communicating from a tree assembly mounted on an inner wellhead housing to a casing annulus. A passage in the wellhead assembly extends within the bore of the wellhead housing from the casing annulus to the tree assembly. A portion of the passage is located within a casing hanger. The passage is opened and closed by a valve. The valve does not open the passage until the tree assembly is connected to the wellhead housing and a tubing hanger orientation sleeve lands in the wellhead assembly. The tubing hanger orientation sleeve actuates the valve when it lands to open the passage. When the passage is opened, the casing annulus is in fluid communication with the interior surface of the wellhead housing, which is in communication with the tree assembly. The valve can be located in the casing hanger, or in a bridging hanger