Protection means for a flexible riser
AssigneeStatoil ASA
InventorsSveinung Løset, Ove Tobias Gudmestad
Life of this patent
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Abstract
The invention relates to flexible risers for transfer of hydrocarbons between a sea bed installation and a vessel (10) floating at the sea surface. The riser (18) is provided with means (20) for protecting the riser (18) from impacts. The protection means (20) covers at least the upper part of the riser (18) and is retractable to an inactive position. When in operation, the riser protection means (20) is either suspended from the vessel (10) or from a submerged turret buoy, forming part of a mooring system for the vessel (10).
Claims17
Flexible riser for transfer of hydrocarbons between a sea bed installation and a vessel (10) floating at sea surface, the flexible riser (18) being intended to be submerged to position below the sea level when the riser (18) is disconnected from the vessel (10) comprising the riser (18) is provided with means (20) for protecting the riser (18) from impacts and wear, caused e.g. by drifting ice, the protection means (20) covering at least the part of the riser (18) being exposed to wave and being formed of a plurality of separate elements (23), the flexible riser (18) being retractable to an in-active, retracted position below the sea level when the riser (18) is not in operation.
Dependencies are inferred from the claim text.