Marine riser base system

Hydraulic and earth engineering – Marine structure or fabrication thereof – Storage container

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Details

405195, 166345, B63C 1100, E02D 2100

Patent

active

046326030

ABSTRACT:
A marine riser base system including a flex means for fluidly connecting a riser flowline carried by a marine riser to the interior of a fluid-tight hull of a submerged structure. The hull, e.g. a subsea atmospheric riser manifold (SARM), is positioned on the marine bottom and has a platform positioned above and isolated therefrom to which the lower end of the riser is connected. The flex means is comprised of a length of rigid pipe having a curved portion therein which connects a flowline connector on the platform to the interior of the hull. The pipe extends from the flowline connector, around the external surface of the hull, and penetrates the hull on the lower side thereof. The cyclic forces experienced by the platform are distributed along the length of pipe due to the relative flexibility of the curved portion thereof which provides a long operational life of the flex means.

REFERENCES:
patent: 3518836 (1970-07-01), Itokawa
patent: 3837310 (1974-09-01), Toyama
patent: 4147456 (1979-04-01), Klass
patent: 4182584 (1980-01-01), Panicker et al.
patent: 4266888 (1981-05-01), Bayer et al.
patent: 4335979 (1982-06-01), Stafford
patent: 4398846 (1983-08-01), Agdern
OTC 4512 "Deepwater Production Riser", Panicker and Yancey, presented at the 15th Annual Offshore Technology Conference, Houston, Tex. May 2-5, 1983.

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