Wells – Submerged well – Connection or disconnection of submerged members remotely...
Reexamination Certificate
2006-07-11
2006-07-11
Dang, Hoang (Department: 3672)
Wells
Submerged well
Connection or disconnection of submerged members remotely...
C166S086200, C166S087100, C166S368000, C166S386000
Reexamination Certificate
active
07073591
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
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Buckle Kevin G.
Lovell Richard
Massie Alfred
Moore Harry A.
Osborne John H.
Bracewell & Giuliani LLP
Dang Hoang
Vetco Gray Inc.
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