Abstract: A downhole wellbore treatment system for and a method of treating an inner surface (FT) of a wellbore (W) is provided. The system comprises an elongate conduit (50) such as a flexible hose (50) for conveying treatment fluid from the surface (P; C) to a treatment head (80) adapted to be inserted into the wellbore (W). The treatment head (80) has a nozzle (83) providing an outlet from the conduit (50) for creating a jet of treatment fluid directed at the inner surface (FT) of the wellbore (W). The treatment head (50) is rotationally disconnected from the conduit (50) by a swivel device (70), allowing rotation of the head (50) relative to the conduit (50) during jetting of the treatment fluid. The elongate conduit (50) is reelable (10) and is inserted into the downhole wellbore (W) from a reel (10) at the surface, through a pressure control device (40) containing wellbore pressure within the downhole wellbore (W) during insertion of the elongate conduit (50) from the reel (10).

Abstract: A cleaning system is for cleaning an interior of a subsea structure by use of fluid. The cleaning system has a subsea unit, the subsea unit typically including: a fluids inlet; a hydraulics inlet; a hose, the hose having a nozzle; a feeder for feeding the hose into the interior and for retracting the hose from the subsea structure; and a entry connector for connecting to the subsea structure to be cleaned, through which entry connector the hose may be fed to enter the subsea structure, and a hose reel configured to rotate around a first and a second axis. The rotation around the first axis is for feeding and retracting the water hose and the rotation around the second axis is for rotating the water hose around the its longitudinal axis. A method is for using the cleaning system.

Abstract: An actuator device for moving a tool within a borehole in the ground, the actuator being positioned between a coiled tubing and a tool, and the actuator being arranged to move the tool at a substantially constant axial speed and the actuator including a motor-operated mandrel which is moved outwards in the actuator by means of a releasable nut, the nut being locked in its active position by means of a hydraulically operated locking piston.