Extended semi-submersible vessel (ESEMI)

Details Extended semi-submersible vessel (ESEMI) Extended semi-submersible vessel (ESEMI)

2007-05-22

2007-05-22

Sotelo, Jesús D. (Department: 3617)

Ships

Floating platform

Multiple leg

C114S293000

Reexamination Certificate

active

11295852

ABSTRACT:
A semi-submersible vessel has a pair of vertically spaced pontoons with varied buoyancy. The lower pontoon is retained in a close vertical proximity to the upper pontoon when the vessel is in transit. The lower pontoon is ballasted at the deployment site, dropping the pontoon to a depth of about 32 meters below the first pontoon baseline. As a result, stability and motion characteristics of the vessel are significantly improved.

REFERENCES:
patent: 4040215 (1977-08-01), Totsuka
patent: 4829928 (1989-05-01), Bergman
patent: 4907912 (1990-03-01), Smith
patent: 5012756 (1991-05-01), Kristensen
patent: 6374764 (2002-04-01), Davenport, III et al.
patent: 6652192 (2003-11-01), Xu et al.

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