Well operations system
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United States of America Patent
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Dec 18, 2007
Grant Date -
Dec 7, 2006
app pub date -
Jul 25, 2006
filing date -
Jun 1, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the production casing hanger for monitoring production casing annulus pressure, and the introduction of larger tools into the well hole without breaching the integrity of the well.
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