Kvaerner Oilfield Products A.s.

Ove F Jahnsen

Per-Ola Baalerud

A composite riser for transporting fluids between a location on a seabed and an installation near or at the surface of the sea comprises an outer sheath of tubular form extending longitudinally in a lengthwise direction of the riser, a plurality of spacing members arranged within the outer sheath so as to define a plurality of longitudinally extending channels in the outer sheath from one end to an opposite end of the riser, and a plurality of fluid-carrying tubes disposed in the channels such that the tubes are freely movable in the lengthwise direction of the riser relative to the outer sheath, the tubes being constructed of fiber-reinforced plastic material. One or more tension members are disposed in the channel(s) and are freely movable relative to the outer sheath in the longitudinal direction.

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Oslo, Norway

Ove F Jahnsen