Kellogg Brown + Root LLC

William Lewis Greiner

John Christian Hartley Mungall

David Brian Andersen

Shankar Uluvana Bhat

Kevin Gerard Haverty

Disclosed are compliant variable tension risers () to connect deep-water subsea wellheads () to a single floating platform (). The variable tension risers () allow several subsea wellheads (), 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 ().

Dry tree subsea well communications apparatus using variable tension large offset risers

Disclosed are methods to counter buoyancy and install variable tension risers using a weighted chain ballast line. An example of an apparatus used in conjunction with the embodiments includes compliant variable tension risers to connect deep-water subsea wellheads to a single floating platform. The variable tension risers allow several subsea wellheads, 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.

Dry tree subsea well communications methods using variable tension large offset risers

Disclosed are compliant variable tension risers () to connect deep-water subsea wellheads () to a single floating platform (). The variable tension risers () allow several subsea well-heads (), 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 (). Also disclosed are methods to counter buoyancy and install variable tension risers using a weighted chain ballast line ().

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Houston, TX, United States of America

William Lewis Greiner