Wellhead
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United States of America Patent
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-
Aug 13, 1996
Grant Date -
N/A
app pub date -
Mar 16, 1994
filing date -
Jun 1, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wellhead having, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. The tubing string can be pulled without disturbing the tree and access may be had to the production casing hanger for monitoring production casing annulus pressure and for the introduction of larger tools into the well hole without breaching the integrity of the well. In the embodiment described, a valve is used to open and close a fluid pressure passage between the production casing annulus and a production casing annulus monitoring port in the spool tree.
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