Insert tree

Details Insert tree Insert tree

1997-11-21

1999-10-26

Suchfield, George

Wells

Submerged well

Wellhead

166 861, 166 891, 166 971, 166348, E21B 33035, E21B 3404

Patent

active

059710772

ABSTRACT:
A subsea well has a an outer wellhead housing with a tree on an upper end and a tubing hanger landed in the bore of the tree. A tree cap lands on and is secured to the tree. The tree cap has a plurality of production and annulus valves and a dual-bore control pod assembly. The tree has annulus bypass passages which communicate with a tubing annulus on a lower end and upper ports in the tubing hanger on an upper end. Production fluids flow up the tubing hanger bore to the tree cap and circulates through a flowline in the control pod. Access to the tubing annulus is through the annulus passages and tree cap annulus passage to a separate flowline.

REFERENCES:
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patent: 5143158 (1992-09-01), Watkins et al.
patent: 5535826 (1996-07-01), Brown et al.
patent: 5575336 (1996-11-01), Morgan
patent: 5868204 (1999-02-01), Pritchett et al.
patent: 5873415 (1999-02-01), Edwards
patent: 5884706 (1999-03-01), Edwards

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