Well operations system

Wells – Submerged well – Connection or disconnection of submerged members remotely...

Reexamination Certificate

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C166S088400, C166S095100, C166S368000

Reexamination Certificate

active

07093660

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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