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:
May. 16, 2006
Filed:
Dec. 10, 2002
Charles E. Jennings, Houston, TX (US);
Ian D. Calder, Aberdeen, GB;
Charles E. Jennings, Houston, TX (US);
Ian D. Calder, Aberdeen, GB;
Vetco Gray Inc., Houston, TX (US);
Abstract
A subsea wellhead assembly has the capabilities of communicating from the outer surface of an inner wellhead housing to a casing annulus. A connector, adapted to attach to a riser, connects to the outer surface of the inner wellhead housing, thereby communicating with the casing annulus. The wellhead housing has a passage extending from the casing annulus to its outer surface. The connector has a port that aligns with the passage when the connector attaches to the inner wellhead housing. Fluid can be injected through the port and the passage into the casing annulus. Casing annulus pressure can be monitored though the port and the passage. A seal ring slidingly engages the outer surface of the wellhead housing so that the passage is closed when the connector is not attached. The connector actuates the seal ring to open the passage when the connector attaches to the wellhead housing.