Wells – Submerged well – Wellhead
Reexamination Certificate
2007-01-22
2009-10-27
Beach, Thomas A (Department: 3671)
Wells
Submerged well
Wellhead
C166S373000, C166S382000, C166S386000, C166S387000, C166S344000, C166S348000, C166S089200, C166S088400
Reexamination Certificate
active
07607485
ABSTRACT:
A subsea wellhead assembly has a tubing annulus path that extends partly through the tubing hanger and partly through the wellhead housing. A tubing hanger tubing annulus passage extends through part of the tubing hanger from a lower port on the lower end of the tubing hanger to an upper port on the exterior surface of the tubing hanger below the tubing hanger seal. A wellhead housing tubing annulus passage within the sidewall of the wellhead housing has a lower end at the bore below the tubing hanger seal and an upper end at the bore above the tubing hanger seal. A valve is mounted to the wellhead housing and accessible by an ROV from the exterior for opening and closing the inner wellhead housing tubing annulus passage.
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Davidson Andrew
Fenton Stephen P.
Sollie Lars-Petter
Beach Thomas A
Bracewell & Giuliani
Buck Matthew R
Vetco Gray Inc.
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