Fossura as

Gto Subsea as

Gustav Kvalvaag

Tom Jacobsen

Terje Fagervold

Gunnar Fagervold

Gunner Fagervold

A method for moving subsea rocks and sediments which can be at significant depths, in connection with removal of protective rocks around installations where maintenance is to be conducted. Tubing with an ejector nozzle is arranged completely externally in relation to the tubing on a standard, remote controlled submarine (ROV), so that the ejector nozzle produces a pressure gradient through the tubing. An inlet end of the tubing is located with the rocks and sediments to be moved, which are sucked into the tubing and blown out of the opposite end of the tubing.

Method and device for moving subsea rocks and sediments

Method and device for moving subsea rocks and sediments, particularly at significant depths, for example in connection with removal of protective rocks around subsea installations where maintenance is to be conducted. The device includes a rigid or at least partly flexible tubing thorough which masses may be transported with the aid of a pressure gradient produced by an ejector nozzle arranged externally in relation to the tubing, and fed with water from a water pump. The device further includes a chassis adapted to be transported along the sea bottom. The required power is supplied through a cable from the surface, while the tubing preferably is remotely controlled by a manipulator.

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Frei, Norway

Gustav Kvalvaag