Device for hybrid riser for the sub-sea transportation of petrol

Details Device for hybrid riser for the sub-sea transportation of petrol Device for hybrid riser for the sub-sea transportation of petrol

1998-09-04

2000-07-04

Eloshway, Charles R.

Fluid handling

Distribution systems involving geographic features

4052241, E21B 1701

Patent

active

060823917

ABSTRACT:
A device for transporting petroleum products in deep waters from the seabed up to a floating or semi-submersible surface structure wherein at least one rigid and straight hybrid riser extends vertically. The hybrid riser has a rigid central hollow tubular structure surrounded by a cylindrical block of syntactic material which provides buoyancy and thermal insulation for the riser. A plurality of rigid pipelines are embedded in the syntactic material and surround the central tubular structure for receiving petroleum products from wells on the sea bed. The bottom of the riser is connected to a suction anchor at the sea bed. A submerged float is fixed to the top of the riser and exerts an upward vertical force thereon. Flexible pipelines connect the rigid pipelines in the riser to the floating or semi-submersible structure.

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