Deep water flexible riser protection

Details Deep water flexible riser protection Deep water flexible riser protection

2011-04-19

2011-04-19

Singh, Sunil (Department: 3672)

Hydraulic and earth engineering

Marine structure or fabrication thereof

Structure protection

C405S211000

Reexamination Certificate

active

07927041

ABSTRACT:
Flexible riser systems are used to transfer hydrocarbons between a sea bed installation and a vessel floating at the sea surface. The riser is provided with a protection mechanism to protect the riser from impacts. The protection mechanism covers at least the upper part of the riser and may be retractable to an in-active position. When in operation, the riser protection mechanism is either suspended from the vessel or from a submerged turret buoy, forming part of a mooring system for the vessel. At its lower end, the protection mechanism is provided with an annular body surrounding the riser, the annular body having sufficient weight to provide a downwardly acting force in the riser protection mechanism, causing a stretch or a tension in the riser protection mechanism.

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