Marine riser provided with a hinged foot for offshore hydrocarbon production
AssigneeInstitut Francais du Petrole
InventorCharles Sparks
Life of this patent
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Abstract
This riser has a central pipe connected to an underwater installation through a flexible assembly, and a plurality of satellite pipes connected to corresponding tubes of the underwater installation through a plurality of hoses each arranged along an helical winding. Upper and lower fastening means secure these hoses to the upper and lower parts of the flexible assembly and maintain the ends of each connecting hose in the extension of the helical winding.
Claims12
A marine riser having a hinged foot, for offshore hydrocarbon production, adapted for connecting an underwater installation to a production platform, said riser comprising a central pipe provided with a plurality of satellite pipes, and a flexible assembly, for connecting the riser to the underwater installation, associated with a plurality of flexible connecting hoses each of which is arranged around said flexible connecting assembly in a substantially helical winding arrangement, and said flexible connecting hoses arranged for connecting said satellite pipes to corresponding tubes on the underwater installation, and upper securing means and lower securing means for securing said connecting hoses to said flexible connecting assembly, said upper and lower securing means being respectively integral with the upper and lower parts of said flexible assembly and arranged for maintaining the extremities of each flexible connecting hose oriented in the extension of said helical winding arrangement.
A marine riser having a hinged foot, for offshore hydrocarbon production, adapted for connecting an underwater installation to a production platform, said riser comprising a central pipe provided with a plurality of satellite pipes, and a flexible assembly, for connecting the riser to the underwater installation, associated with a plurality of flexible connecting hoses each of which is arranged around said flexible connecting assembly in a substantially helical winding arrangement, said flexible connecting assembly comprising at least two serially connected flexible joints, and said flexible connecting hoses arranged for connecting said satellite pipes to corresponding tubes on the underwater installation, upper securing means and lower securing means being respectively integral with the upper and lower parts of said flexible connecting assembly and arranged for maintaining the extremities of each flexible connecting hose oriented in the extension of said helical winding arrangement, and intermediate securing means for securing said flexible connecting hoses to said riser at a location between said flexible joints.
A marine riser having a hinged foot, for offshore hydrocarbon production, adapted for connecting an underwater installation to a production platform, said riser comprising a central pipe provided with a plurality of satellite pipes, and a flexible connecting assembly, for connecting the riser to the underwater installation, associated with a plurality of flexible connecting hoses each of which is arranged around said flexible connecting assembly in a substantially helical winding arrangement, and said flexible connecting hoses arranged for connecting said satellite pipes to corresponding tubes on the underwater installation and having a radius of curvature sufficient to permit passage of pumped tools therethrough, and upper securing means and lower securing means for securing said connecting hoses to said flexible connecting assembly, said upper and lower securing means being respectively integral with the upper and lower parts of said flexible connecting assembly and arranged for maintaining the extremities of each flexible connecting hose oriented in the extension of said helical winding arrangement.
Dependencies are inferred from the claim text.