Loading hose
A hydrocarbon loading hose ( 4 ) for connection between a GBS ( 1 ) and a shuttle hydrocarbon transport vessel ( 2 ), arranged in water (W) and at a distance apart, comprises buoyancy means ( 5 ) in its mid region and at least one buoyancy element ( 7 a, b ) in a free end region.
1. A fluid transfer system, comprising:
a first structure comprising a hydrocarbon production and/or storage facility and a second structure comprising a hydrocarbon transport vessel arranged in water and at a distance apart, and
a pipeline configured for connection between the structures,
wherein the structures comprise respective coupling and suspension mechanisms for suspending respective ends of the pipeline, the coupling and suspension mechanisms comprising:
a reel disposed on the hydrocarbon production and/or storage facility onto which the pipeline is stored; and
a manifold disposed above the surface of the water on a bow of the hydrocarbon transport vessel, and
the pipeline comprising:
a plurality of first buoyancy elements disposed in a mid region of the pipeline so that the pipeline forms a “soft W” or “soft catenary” in the water, a net buoyancy of the plurality of first buoyancy elements being such that the mid region remains below the water surface, when the pipeline is unwound from the reel;
a free end with a coupling for direct connection to the manifold; and
at least one second buoyancy element in a region of the free end and in the vicinity of the coupling, whereby the free end of the pipeline is configured to float after disconnect of the coupling of the free end from the manifold of the hydrocarbon transport vessel,
wherein the plurality of first buoyancy elements:
are each cylindrical in shape;
are arranged around a portion of the pipeline; and
are elastic such that each adapts to a shape of the reel when the pipeline is stored without removing the plurality of first buoyancy elements.
2. The fluid transfer system of claim 1 , wherein the number of the second buoyancy elements is fewer compared to the number of the plurality of first buoyancy elements.
3. The fluid transfer system of claim 1 , wherein the at least one second buoyancy element:
is cylindrical in shape;
is arranged around another portion of the pipeline; and
is elastic such that the at least one second buoyancy element adapts to the shape of the reel when the pipeline is stored on the reel without removing the at least one second buoyancy element.
4. The fluid transfer system of claim 1 , wherein the at least one second buoyancy element and the plurality of first buoyancy elements comprise a compartment into which a ballast material is inserted.
5. The fluid transfer system of claim 1 , wherein the manifold is arranged in a bow region of the hydrocarbon transport vessel.