Dry tree subsea well communications apparatus and method...

Details Dry tree subsea well communications apparatus and method... Dry tree subsea well communications apparatus and method...

2007-03-20

2007-03-20

Beach, Thomas A (Department: 3671)

Wells

Submerged well

Means removably connected to permanent well structure

C166S350000, C166S367000, C405S224400

Reexamination Certificate

active

10710780

ABSTRACT:
Disclosed are compliant variable tension risers (106) to connect deep-water subsea wellheads (102) to a single floating platform (104). The variable tension risers (106) allow several subsea well-heads (102), in water depths from 4,000 to 10,000 feet, at lateral offsets from one-tenth to one-half of the depth, to tie back to a single floating dry tree semi-submersible platform (104). Also disclosed are methods to counter buoyancy and install variable tension risers using a weighted chain ballast line (228, 230).

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