Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1985-10-31
1987-06-02
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
405204, 405224, E02B 1700
Patent
active
046699171
ABSTRACT:
A steel structure supports a deck with production facilities for oil and gas at large water depths and is assembled while it is floating in the sea. The structure includes a vertical erected triangular trusswork tower supported by a base and extending up to a level above the water surface where it supports a deck. The tower includes three corner columns interconnected by horizontal and diagonal trusswork stays. The tower is supported by three inclined supporting legs which terminate in base foundations. The supporting legs are symmetrically arranged around the tower in such a way that each of them faces a respective side plane of the triangular tower. Each supporting leg has a trusswork construction of triangular cross-section.
During installation of the structure the tower is floated vertically in the sea, while the supporting legs are floated in approximately horizontal position with installation frames mounted thereon. The upper part of each supporting leg is connected to a temporary joint of the tower, and the legs are rotated down into final position by wire systems pulling the installation frames to connection points of the frames to the tower.
REFERENCES:
patent: 3852969 (1974-12-01), Gibson et al.
patent: 3996754 (1976-12-01), Lowery
patent: 4000624 (1977-01-01), Chow
patent: 4557629 (1985-10-01), Meek et al.
Norsk Hydro a.s.
Taylor Dennis L.
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