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US 4,895,481 AGranted
Non-rigid marine platform with surface wellheads
AssigneeDoris Engineering
InventorsJean F. M. Pepin-Lehalleur, Lo c M. J. Danguy des Deserts
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Abstract
A platform consisting of a rigid structure supporting the deck, floats fixed to the lower part of the rigid structure, and flexible structure formed of piles fixed by their upper ends to the rigid structure and to the floats and by their lower ends to a base provided on the seabed, the piles being held under tension.
Claims10
A non-rigid marine platform for use in deep water applications which comprises:
- a base which is positioned on a seabed,
- a rigid structure, the rigid structure including a plurality of floats located below a surface of the water, a lattice structure which extends upwardly from the floats and above the surface of the water, and a deck with production wellheads mounted on the lattice structure so as to be positioned above the surface of the water,
- a plurality of conducting tubes which extend from the seabed upwardly to the rigid structure to connect with the production wellheads,
- a plurality of flexible, tubular piles which extend upwardly from the base to the rigid structure, the tubular piles being held under a total tension force exerted thereon by the floats of the rigid structure which is greater than the total compression force on the conducting tubes, and
- a plurality of guide frames at spaced apart locations along the plurality of tubular piles between the base and the rigid structure and through which the plurality of tubular piles and the plurality of conductors pass.
2 more elements
Dependencies are inferred from the claim text.