Abstract: Cleaning head (22), cleaning device (8) comprising one or more cleaning heads (22), and a method for cleaning a surface, such as a ship's hull. The cleaning head (22) comprises: —a frame (18) comprising a nozzle shaft (32); —one or more nozzles (44) for cleaning the surface that are connected to the nozzle shaft (32) of the frame (18), with rotating means such that the nozzles (44) are rotatable around magnetic positioning means (46, 42); —magnetic positioning means (46, 42) for positioning the head (22) relative to the surface that are provided or attached to the frame (18); and—an activating element for manipulating the distance between the surface and the positioning means (46, 42), the activating element being connected to the positioning means, wherein the magnetic positioning means (46, 42) are movable between at least a first state and an active second state.

Abstract: Invention relates to a system and associated method for continuous and/or semi-continuous drilling a borehole, comprising:—a first stationary housing;—a rotatable housing comprising a longitudinal opening for receiving a drill string; and—a radial clamping system configured for holding and clamping the box end of the drill string in substantially radial direction with respect to the rotatable housing;—a first direct sealing system in use arranged between drill pipe and the rotatable housing;—a second indirect sealing system in use arranged between the rotatable housing and the stationary housing;—a mechanical and/or hydraulic transmission configured for radial activation of the radial clamping system; and—a first drive configured for rotating the rotatable housing with the drill string.

Abstract: Cleaning head (22), cleaning device (8) comprising one or more cleaning heads (22), and a method for cleaning a surface, such as a ship's hull. The cleaning head (22) comprises: a frame (18) comprising a nozzle shaft (32); one or more nozzles (44) for cleaning the surface that are connected to the nozzle shaft (32) of the frame (18), with rotating means such that the nozzles (44) are rotatable around magnetic positioning means (46, 42); magnetic positioning means (46, 42) for positioning the head (22) relative to the surface that are provided or attached to the frame (18); and an activating element for manipulating the distance between the surface and the positioning means (46, 42), the activating element being connected to the positioning means, wherein the magnetic positioning means (46, 42) are movable between at least a first state and an active second state.