Abstract: Method and device for subsea removal of cuttings from a borehole by means of ejector (5), pump (3) and suction hose (6), the ejector (5) being powered by a pump (3) that is rigidly attached to ROV (2), said ejector (5) being one with external nozzle, while said ROV (2) with pump (3) is connected to the ejector only when removal of cuttings is to take place.

Abstract: Subsea excavation and suction device includes a suction head with an inlet opening at an outer, free end and an outlet opening connected to a suction hose arranged at a distance from the inlet opening. The suction head is mounted on a hydraulic controller arm and at the inlet opening is provided with mechanical and hydraulic devices to disintegrate solid material (sediment). The hydraulic device includes a number of jet nozzles, while the mechanical device includes bars. The cross-sectional area of the inlet opening is larger than the cross-sectional area of the outlet opening.

Abstract: 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.