Abstract: A method and a device for controlling a downhole hydraulic sequential control system (1) in which a number of pressure relief valves (20, 22) are arranged to open sequentially directly or indirectly for corresponding actuators (26, 34) through introduction of a hydraulic fluid, wherein the pressure of working fluid supplied to the control system is transmitted to hydraulic fluid in the control system (1). The pressure transfer may be effected by means of a dividing piston (6).

Abstract: A disconnection device for disconnecting a tool and a pipe string comprises a first connection part releasably connected to a second connection part by means of a locking device and a release object. The release object is soluble by means of, for example, acid.

Abstract: A quick connector (10,12) is to facilitate the connecting of the connecting end of coiled tubing and the connecting end of a tool. For this purpose, the connector comprises two connectable and lockable main parts (10 and 12) formed to be screwed to the end of coiled tubing and the tool, respectively, when the main parts (10 and 12) are in separate positions. A first main part (10) has a freely ending pin element (16) conically narrowing towards said free end, with elongate, axially directed, circumferentially distributed ridges (20) with intermediate grooves (18). A second main part (12) has a pin-element-accommodating bore (22) of complementarily conical shape, defined by corresponding ridges (24) with intermediate grooves (26). At least one set of elongate ridges (24 and/or 20) have rounded top portions.

Abstract: An orientation device, particularly for drilling tools, of the kind comprising a first sleeve (1) and a concentrically surrounding second sleeve (2), where in an annulus between the sleeve (1) and the sleeve (2) is disposed an axially displaceable carrier, e.g., in the form of a wedge/key (5) or a rail (8, 9), adapted to slide in an inclined, preferably helical groove (3, 4) disposed in the sleeve (1) or in the sleeve (2), the groove's direction crossing the direction of the carrier's (5; 8, 9) rectilinear movement which, thus, is converted into a relative rotational movement between the sleeve (1) and the sleeve (2). The carrier (5; 8, 9) is adapted to slide in two inclined, preferably helical grooves (3, 4) disposed in the sleeve (1) and the sleeve (2), respectively, and crossing the direction of the carrier's (5; 8, 9) rectilinear movement from opposite side.

Abstract: A hydraulically or pneumatically releasable disconnecting device (1), through which a liquid can flow, and wherein two end pieces (2, 3) are connected in that an expandable locking ring (20) in normal position engages grooves (23) in a locking sleeve (10). An axially displaceable locking sleeve (6) surrounds the locking ring (20) with one end thereof and prevents the locking ring (20) from expanding and disengage the grooves (23). The locking sleeve (6) is fixed with shear pins (7). When the disconnecting device (1) is to be released, a sealing body (14) is placed in a seat (13) in a piston sleeve (12), preventing flow of liquid therethrough. Hydraulic force acting against the sealing body (14) and the piston sleeve (12), urges the piston sleeve (12) against the safety sleeve (6) such that the shear pins (7) are broken. Thus, the safety sleeve (6) is displaced such that it can no longer surround the locking ring (20).