Abstract: A friction pig 2 and system for monitoring one or more physical properties upstream and/or downstream of the friction pig 2 when in use in a pipe 1 is disclosed. The friction pig comprises at least one sensor 7 connected to the friction pig 2 for sensing and acquiring data related to one or more physical properties concerning the friction pig 2 or fluid upstream and/or downstream of the friction pig 2; means for receiving instructions from a remote control unit 12; means for carrying out instructions; and means for transmitting the acquired data to the remote control unit 12, thus enabling monitoring of one or more physical properties. Friction pigs preferably comprise friction plugs, for example high-friction plugs, for use in pipeline isolation. The invention is also described by a system comprising at least two friction pigs 2, 4 for measuring one or more physical properties when used in a pipe.

Abstract: The present invention regards a plug (2) for scaling off a pipeline (1), comprising a main body (3), scaling means (6) and gripping means (5) arranged circumferentially around the main body (3) and actuation means (4) for operating the sealing and gripping means (5,6) where the gripping means (5) comprise at least one slip (10) with an outer surface (11) for contact against the pipe wall and an inner gliding surface (12) arranged in abutment against a first angled guiding surface (21), forming an angle ? with a center axis of the plug (2), so that the gripping means (5) when actuated is moved relative to the guiding surface (21) to move the slips (10) in a radial direction where the guiding surface (21) in addition is moved in a radial direction relative to the center axis of the plug (2).

Abstract: The present invention relates to an arrangement for use with a plug (1) for sealing against an inner wall of a pipeline (30), comprising a main body and sealing means, which sealing means comprises an annular packer element (7), arranged between two relative movable body elements (5,6) of the main body actuated by actuation means, where the movable elements form surfaces (500,600) in abutment against the packer element (7). The packer element (7) comprises a radially inner section (705) which is mainly incompressible in a direction transverse to a circumferential direction and where sections of the two surfaces (500,600) in abutment against the inner section (705) of the packer element (7) in a retracted position, forms different angles in relation to an axis in radial direction in relation to a longitudinal axis of the plug.

Abstract: The present invention regards a barrier plug system (3) for sealing off a pipe (1), comprising a plug body, a first and a second end plate surface (11, 31) arranged on opposite sides of the plug body and at least one circumferential sealing means (6) and means (8) for setting the plug system (3). The plug body comprises at least two separate plug body elements (10, 30) movable relative each other and the at least one sealing means (6) is arranged abutting two opposite annular pressing surfaces (12, 32) formed by the plug body, which are moved towards each other during setting of the plug system (3). The pressing surfaces (12, 32) are limited in the movement against each other by stop means and pre-tensioned to move toward each other by at least one tensioning device (7).

Abstract: The invention regards a device for movement within a pipeline which device comprises at least one centralizing means (20) comprising at least two centralizing elements (21) arranged around the circumference of a body (8) of the device. The centralizing elements (21) are arranged to move from a retracted position to an extended position in contact with an inner wall (2) of a pipeline (1) to centralize the device.

Abstract: A coupling according to the invention comprises a first part (1) and a second part (2). The first part (1) comprises a housing (5) with a bore (6) and a slide element (7) arranged movable within the bore (6) and the slide element (7) has two ends (10,11), which both end surfaces (10,11) in a disconnected state of the coupling, are exposed to a surrounding fluid around the coupling.

Abstract: A plug for use during a pipeline laying operation for sealing off sections of the pipeline in case of water ingress. A sealing and gripping assembly is formed of slip segments around a partially conical shaped surface, the slip segments being moved by a piston/cylinder arrangement. A valve connected to a pressure vessel actuates the piston/cylinder in response to the detection of conductivity of fluid around the plug.

Abstract: The invention regards a hydraulic cylinder (1) or a plug comprising a hydraulic cylinder for operation of anchoring and or sealing devices, where the hydraulic cylinder comprising a cylinder chamber (6), a piston head (4) within said cylinder chamber (6) forming two sub chambers (7, 7?) of said cylinder chamber (6) one on each side of the piston head (4), and a piston rod (5) which runs through the piston head (4) and said two sub chambers (7, 7?) or only one of said cub chambers. The hydraulic power unit (8) for operation of the hydraulic cylinder (1) is situated at least partly within the parts forming the hydraulic cylinder (1) itself, preferably the piston head (4) and or the piston rod (5).

Abstract: A method and device for preventing water from penetrating into the rising part/intermediate section (12) of a pipe (6) when laying the pipe (6) on or near the seabed (8) by means of a pipelay vessel (1), and where a plug (22) that seals against, travels and locks in the inside passage of the pipe (6) is arranged inside the pipe (6) between the lay vessel (1) and the seabed (8), where during normal pipelaying the plug (22) is displaced in the pipe (6) so as to essentially maintain its relative position relative to the pipelay vessel (1), and where in the event of water flowing into the pipe (6), the plug (22) is locked in the pipe (6), whereby water is prevented from filling the rising part/intermediate section (12) of the pipe (6).