Tubing hanger and wellhead housing with mating tubing annulus passages
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United States of America Patent
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-
Oct 27, 2009
Grant Date -
Jul 26, 2007
app pub date -
Jan 22, 2007
filing date -
Jan 26, 2006
priority date (Note) -
In Force
status (Latency Note)
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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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