Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1983-03-24
1985-05-28
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
114265, 114 40, 405195, 405217, B63B 3508
Patent
active
045197288
ABSTRACT:
A floating offshore structure which is moored at a fixed position on the sea by means of mooring hawsers and anchors connected to the ends thereof respectively for conducting a submarine excavating operation from a deck of the structure. The structure includes a moorage hull part provided with a vertical through-hole formed therein for receiving an excavating drill pipe and the mooring hawsers and a movable hull part connected to the moorage hull part so as to be rotatable within a horizontal plane. The movable hull part is constituted as a hull defining the outer wall of the floating offshore structure and connected with the moorage hull part by inserting it into a moorage hull part receiving hole formed at a position closer to the bow thereof. The movable hull part has near its water plane a horizontal section with a substantially oval shape formed by a fore draft part in a substantially circular or polygonal shape, with the moorage hull part receiving hole as a center and an after draft part taperingly projecting aft from the fore draft part.
REFERENCES:
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patent: 3766874 (1973-10-01), Helm et al.
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patent: 4048943 (1977-09-01), Gerwick
patent: 4102144 (1978-07-01), Anders
patent: 4216834 (1980-08-01), Wardlaw
patent: 4434741 (1984-03-01), Wright et al.
Narita Hitoshi
Oshima Masanao
Tabuchi Hiroshi
Yashima Nobuyoshi
Mitsui Engineering and Shipbuilding Company, Ltd.
Taylor Dennis L.
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