Semi-submersible drill barge

Details Semi-submersible drill barge Semi-submersible drill barge

1975-08-25

1977-04-05

Blix, Trygve M.

Ships

Floating platform

Multiple leg

B63B 3544

Patent

active

040155528

ABSTRACT:
A double-ended, flat-bottomed hull, having a length to beam ratio of approximately 2 to 1+, with sides tapering from amidships to the pointed ends respectively. Two octagonal (in cross-section) end columns and two larger rectangular beam columns are equally spaced around the perimeter of the hull for supporting a work deck thereabove, for providing columnar storage rather than work deck storage and a lower center of gravity, and for eliminating external trussing. The configuration of the hull substantially increases its natural heaving period, and, coupled with an added-mass factor increased by chamfering the hull perimeter between columns and breakwaters mounted on an end and a beam, extend the range of wave height and period range of seas in which the barge can operate and avoid resonance and substantial beam wave effect.

REFERENCES:
patent: 2591599 (1952-04-01), Parks
patent: 2942425 (1960-06-01), De Long et al.
patent: 2987892 (1961-06-01), Reeve
patent: 3011467 (1961-12-01), Tourneall
patent: 3610193 (1971-10-01), Lacy
patent: 3685305 (1972-08-01), Lloyd
patent: 3771481 (1973-11-01), Goren et al.

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