Wells – Above ground apparatus – Inner member anchor or seal with lateral port
Reexamination Certificate
2005-09-13
2005-09-13
Singh, Sunil (Department: 3673)
Wells
Above ground apparatus
Inner member anchor or seal with lateral port
Reexamination Certificate
active
06942028
ABSTRACT:
A subsea wellhead assembly has a wellhead housing at the upper end of the well. The wellhead housing supports one or more strings of casing, each having a casing hanger. A tubing spool connects to the upper end of the wellhead housing. The tubing spool has a landing shoulder with a plurality of auxiliary passages extending from the shoulder to the exterior of the tubing spool. The auxiliary passages are spaced circumferentially around the tubing spool. A receptacle on the exterior of the tubing spool communicates with these auxiliary passages. A tubing hanger lands in the tubing spool, the tubing hanger having auxiliary ports spaced circumferentially around it. These ports mate with the auxiliary passages to communicate with auxiliary lines extending alongside the tubing. A production tree mounts to the upper end of the tubing spool. A control unit mounted to the production tree assembly has a flexible lead that extend from it and plugs into the receptacle.
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Bracewell & Giuliani LLP
Singh Sunil
Vetco Gray Inc.
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