Deep water mobile submersible arctic structure

Details Deep water mobile submersible arctic structure Deep water mobile submersible arctic structure

E - Fixed Constructions

02

B

61/9

E02B 17/00 (2006.01)

Patent

CA 1242082

ABSTRACT DEEP WATER MOBILE SUBMERSIBLE ARCTIC STRUCTURE The mobile marine drilling structure (10) is of the submersible type for operation in ice-covered waters. The structure comprises a base (9) for placing the structure on the sea bed (11), a hull (13) extends from the base, and a deck (20) is supported by the hull. The deck is located above the water line for conducting drilling operations. The hull has an internal frame assembly including ballast tanks (34), and external wall sections (22-27) at different inclinations to the horizontal to engage and break up the moving ice masses encroaching on the hull. These external wall sections include a plurality of matching polygonal, frusto-pyramidal, apex-up and apex-down walls extending above the base, and two transitional wall sections (27, 30) to provide two inflection points to the hull for separating the ice slabs from the structure.

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