Offshore system

摘要

The invention relates to an offshore system for transferring fluid at least partly below sea surface. The offshore system comprises a flexible transporting unit and a first movable structure fix-point with a nominal position and a second structure fix-point arranged at a distance to seabed and at a lower position relative to the sea surface than the first structure fix-point. The flexible transporting unit is fixed to respectively the first structure fix-point and the second structure fix-point to provide a catenary liftable length section of the flexible transporting unit extending between the first structure fix-point and the second structure fix-point, wherein the catenary liftable length section has a touch down point at seabed at nominal position and where the distance to the second structure fix-point can be increased sufficiently to lift the catenary liftable length section from the seabed to form a catenary.

主权项

1. An offshore system for transferring fluid at least partly below sea surface, the offshore system comprises:
an unbonded flexible transporting unit comprising an internal sealing sheath and at least two reinforcement layers which are not bonded to each other, a first movable structure with a first movable structure fix-point with a nominal position, and a second structure with a second structure fix-point arranged at a distance to a seabed and at a lower position relative to the sea surface than the first structure fix-point, wherein:
the flexible transporting unit is fixed to respectively the first structure fix-point and the second structure fix-point to provide a catenary liftable length section of the flexible transporting unit extending between the first structure fix-point and the second structure fix-point,the catenary liftable length section has at least a touch down point at the seabed at the nominal position of said first structure fix-point, andif the first structure fix-point is moved out of its nominal position, the distance from the first structure fix-point to the second structure fix-point is sufficiently increasable to lift the catenary liftable length section from the seabed to form a catenary.