Abstract: The following invention relates to a subsea actuator (16?; 16?) for actuating a subsea rotating component (81; 181); comprising: a first biasing element (82; 182); a motor (85; 185); a holding element (83; 100, 183) configured to receive an input force; a rotatable stem (80?, 80?, 250, 84; 80; 200) operatively connectable to the component; a force transmitting arrangement (84, 80?, 80?; 83, 84; 183?, 195, 201; 84, 99, 86, 101, 83) connectable to the first biasing clement (82; 182) and the holding element (83; 100, 183); a first connection which in a first mode is configured to lock the stem (80?, 80?, 250, 84; 80; 200) in a rotatable engagement with the motor (85; 185) and in a second mode is configured to unlock the stem (80?, 80?, 250, 84; 80; 200) from the rotatable engagement with the motor (85; 185) and allow the stem (80?, 80?, 250, 84; 80; 200) to be influenced by the first biasing element (82; 182); wherein the first biasing element (82; 182) and the stem (80?, 80?, 250, 84; 80; 200) are releasably co

Abstract: The present invention relates to a subsea hydraulic control device (10) for hydraulically controlling a subsea module (2). The control device (10) comprises a hydraulic distribution unit (12) with a valve unit (13) and a manifold unit (50), where hydraulic fluid lines are provided in the valve unit (13) and in the manifold unit (50). The hydraulic distribution unit (12) comprises a low pressure hydraulic input port (21) connectable to a low pressure fluid source (LP) and connected to a low pressure fluid line (22) within the hydraulic distribution unit (12), a high pressure hydraulic input port (31) connectable to a high pressure fluid source (HP) and connected to a high pressure fluid line (32) within the hydraulic distribution unit (12), a return port (41) connectable to a return fluid reservoir (R) and connected to a return fluid line (42) within the hydraulic distribution unit (12) and a number of hydraulic output ports (24, 34) connectable to subsea actuators (A) of the subsea module (2).

Abstract: A subsea AC power supply device comprises a subsea transformer, having a primary winding arranged to be connected to a topside AC power supply via a subsea power supply cable, and a subsea shunt reactor, connected in parallel with the primary winding of the subsea transformer. The subsea transformer and the subsea shunt reactor are arranged within a common subsea watertight housing. A subsea AC power supply system comprises a topside AC power supply, a subsea power supply cable connected to the topside AC power supply, and a subsea AC power supply device connected to the subsea power supply cable.

Abstract: It is described a subsea electric actuator (100) operating a linear valve (200), the actuator (100) comprising a roller-screw (2) for translating a rotational movement of a motor (3) to a linear movement of a gate rod (4) operating the valve (200), the actuator (100) comprising: —an actuator housing (101); —an outer roller screw part (2?) rotationally connected to the motor (3) and comprising internal threads forming a first part of a first connection (10), —an inner roller screw part (2?) comprising external threads forming a second part of the first connection (10) and being arranged inside the outer roller screw part (2?), a surface of the inner roller screw part (2?) having a first interface forming a first part of a second connection (20?; 20?) connecting the inner roller screw part (2?) to a non-rotational part of the actuator (100), the second connection (20?, 20?) is configured to rotationally lock the inner roller screw part (2?) giving linear movement of the inner roller screw part (2?) when the out

Abstract: —a subsea pump (30) arranged in fluid connection with the well interior (38, 39) providing a closed system suitable for pressure and flow regulation and establishing a temporary fluid flow between the subsea pump and the well interior, —a fluid source (31) supplying fluid to the subsea pump, wherein the subsea pump has a mode of operation for regulation of the flow and/or pressure between the pump and the well interior to operate equipment arranged in the well, —a safety control system for controlling shut down of a valve arrangement in a subsea position, which safety control system is also arranged in a subsea position and comprises a control unit (60) and an actuation unit (70) for local control and operation of the valve arrangement, —the valve arrangement is operated by the control unit into a valve configuration providing a barrier system between a reservoir in fluid communication with the well interior and the surroundings, —a plurality of sensors (100, 51, 52) arranged for measuring fluid parameters tr

Abstract: The invention concerns a method for installing a hatch (34) to a subsea structure (10) by connecting the hatch to the subsea structure by at least one hinge (20) having a first mounting portion (21), a second mounting portion (22), a flexible portion (23) interconnecting the first and second mounting portion allowing a pivot connection between the first and second mounting portion. The installation steps comprise •—inserting a protrusion (23) of the first mounting portion (21) into an installation hole arranged in the subsea structure (10), •—inserting a protrusion (24) of the second mounting portion (22) into an installation hole arranged in the hatch (34), thereby •—engaging the first mounting portion (21) of the hinge (20) for anchorage with the subsea structure (10) and engaging the second mounting portion (22) for anchorage with the hatch (34) thereby arranging for the hatch to pivot between a closed and an open position about a pivot axis provided by the flexible portion of the hinge.

Abstract: A remotely operated subsea well completion system, which comprises local storage (28, 36) of hydraulic energy and feedthroughs in a BOP (11) or a marine riser (9), has the object of installing or pulling a production tubing and its tubing hanger without using an umbilical within a marine riser. The system consists of an internal control module (25), which comprises hydraulic accumulators (28), a liquid divider (31), control valves (30, 34), an electric control module (27), as well as one or more transmitters/receivers (19) for communication to an external control unit (21, 26). The communication may be through acoustic feedthroughs in existing choke, kill or booster ports.

Abstract: The present invention provides a heavy solids separator for separating solids from fluids, comprising a swirl-generating chamber (1) and a solids accumulation chamber (2), wherein the swirl-generating chamber (1) comprises an inlet (3), a solids outlet (4) and a fluid extraction pipe (5) arranged at the centerline (C) of the chamber (1), the inlet arranged at an upper part of the swirl-generating chamber, the solids outlet is fluidly connected to the solids accumulation chamber and arranged in the bottom of the swirl-generating chamber, and the fluid extraction pipe (5) has a fluid inlet (6,19) comprising an opening (6) arranged at the centerline of the fluid extraction pipe, the opening facing the solids outlet (4), and a fluid outlet (7) for extracting fluid out of the swirl-generating chamber; and the solids accumulation chamber (2) comprises a solids inlet (8) fluidly connected to the solids outlet (4) of the swirl-generating chamber, and a solids outlet (9) arranged in a lower part of the solids accumula

Abstract: The present invention relates to a subsea control valve (10) for controlling the supply of hydraulic fluid to a subsea fluid-actuated device (4). The valve comprises a housing (11) with an input fluid line bore (16) connectable to a input fluid system (2), a return fluid line bore (17) connectable to a return fluid system (3) and an actuator fluid line bore (18) connectable to the fluid-actuated device (4). A ball valve member (20) with a through bore (21) is pivotably connected within the housing (11) between the input fluid line bore (16), the return fluid line bore (17) and the actuator fluid line bore (18), the ball valve member (20) having a first and a second position. The actuator fluid line bore (18) and the return fluid line bore (17) are connected to each other via the through bore (21) when the ball valve member (20) is in its first position, thereby allowing fluid to be returned from the fluid-actuated device (4) to the return fluid system (3).

Abstract: The invention relates to a tool and associated method for making closed operation in subsea wells possible, without the use of cable or coiled tubing up to the rig or ship. The object of this solution is to move such operations to lighter and more cost efficient vessels or ships which are not necessarily required to handle hydrocarbons up to the deck of the vessel. The basis of maintaining two independent well barrier envelopes is met even if the tool and the method for operation does not require cutting functions for isolating the well from the environment. The tool comprises a hoist arrangement, a seal element and connection points. The localization and arrangement of these are essential for the invention. The invention also adapts for use of traditional workover systems as alternative, independent operation, if the new technique should not complete the operation as planned.

Abstract: The present invention relates to a subsea electric power and communication module (10) for controlling a subsea module (2) of a subsea oil/gas installation (1). The module (10) comprises a housing (20), a first outer connector (30) provided outside of the housing (20), where the first outer connectors (30) is configured to be connected to a subsea module (2), and a control device (80) comprising electric power supply circuitry (80a) and/or communication circuitry (80b) 40b provided within the pressure sealed compartment (25). A penetrator device (50) is connected between the first outer connector (30) and the control device (80). The penetrator device (50) comprises a printed circuit board (51), a first sealing device (53) and a second sealing device (56) for sealing off a first area (A53) and a second area (A56) of the printed circuit board (51).

Abstract: Protecting a hydrocarbon pump from excessive flow rates in a hydrocarbon fluid system comprising an electrical motor for driving the pump. For each of a plurality of gas volume fraction values of the hydrocarbon fluid, establishing a maximum torque limit for the pump by mapping the maximum allowable torque of the pump as a function of the differential pressure, thereby creating a plurality of maximum torque curves, each representing the maximum torque limit for a unique gas volume fraction value. Establishing a master maximum torque curve which represents the maximum torque limit for all gas volume fraction values. Monitoring the torque of the pump and the differential pressure across the pump. Based on the monitored differential pressure and using the master maximum torque curve, establishing a maximum allowable torque for the pump. Taking action if the monitored torque exceeds the established maximum allowable torque.

Abstract: The invention relates to a system, a clamp, and an associated method, for riserless intervention or abandonment of a subsea well (40), the system comprising means for lowering and/or retrieval of wire line tools (19) or equipment from a surface facility (18) to a subsea location, the system comprising: a Pressure Control Head (2) having an internal through-going bore for receiving a wire line (16), wherein the Pressure Control Head (2), during use, allows access to the subsea well (40) for the wire line and serves as a barrier when the wire line (16) and wire line tool (19) is nm into and out of the subsea well (40), a clamp (17) connected to the PCH (2), a wire line tool (19) connected to the wire line (16), and wherein the clamp (17) is adapted to clamp around or being released from the wire line (16) such that lowering and/or retrieving of the Pressure Control Head (2) and the wire line tool (19) is performed using the wire line (16).

Abstract: A compressor system includes a compressor unit having a first rotor and a permanent magnet motor unit having a second rotor connected to the first rotor. The first and second rotors are rotatably supported on at least first, second and third bearings, and the compressor system further includes a housing having a first chamber in which the motor unit is located, a second chamber in which the compressor unit is located and a third chamber in which at least the first bearing is located. The first and third chambers are fluidly sealed from the second chamber and contain a cooling, lubricating and barrier liquid within which the motor unit and the first bearing are submerged, and during operation of the compressor system the fluid is circulated between the first and third chambers.

Abstract: A method of sharing load between a plurality of parallel fluid pumps in a subsea fluid pumping system having first and second pumping units, each of which includes a respective first and second pump, the method including establishing a pump limit characteristics diagram for the first pumping unit by mapping a minimal allowable torque of the first pumping unit as a function of a differential pressure across the first pump, identifying a permissible operating region of the first pumping unit defined by a set of minimum allowable torque values for the first pumping unit, establishing a pump limit characteristics diagram for the second pumping unit by mapping a minimal allowable torque of the second pumping unit as a function of a differential pressure across the second pump, identifying a permissible operating region of the second pumping unit defined by a set of minimum allowable torque values for the second pumping unit, monitoring the torque of the first pumping unit and the differential pressure across the f

Abstract: The invention concerns a modular system for controlling subsea operations. The modular system comprises a control room structure at a top side location, the control room structure is provided with a fixed modular connection assembly. The interior of the control room structure is prepared for accommodation f a set of replaceable control modules comprising at least one dedicated control module provided for controlling a corresponding operational well tool. The said set of replaceable control module(s) is selected in accordance with a chosen subsea operation for accommodation in the control room structure. The said set of replaceable control module(s) accommodated in the control room structure is connected to the fixed modular connection assembly for establishing communication between the at least one dedicated control module and its corresponding operational well tool. The invention also concerns a method for controlling subsea operations.

Abstract: Stress reducing system and associated method for reducing stresses at a desired position in an offshore production or drilling system, the offshore production or drilling system comprising: a seabed structure, a floating structure and a riser (24) extending there between, the riser being tensioned, the riser (24) comprising at least a first part (45) and a second part (46), which second part (46) is connected to the first part (45) via a flexible connection (20) allowing an axial, angular and/or rotational movement between the first and second parts (45, 46), said stress reducing system comprises:—a first sensor (41) for real-time monitoring of stresses at the desired position, positioned at or close to the desired position (20),—an actuating system (42) arranged at the flexible connection (20, the actuating system (42) being connected to said first and second parts (45, 46), and wherein the actuating system (45, 46) is configured to apply a force to the first or second part (45, 46) when the first and second

Abstract: The invention concerns a clamp (1) for joining two connecting elements (2, 3) with abutting faces oriented transverse to a centre axis of the connecting elements. The clamp comprises a first and a second clamp element (4, 5) which are connected to each other by a pivot arrangement (6) and arranged for positioning around an area where the two connecting elements are to be joined. The clamp is provided with a locking device (9) to secure the connecting elements together when used, and the clamp is provided with an actuating device (10) which is arranged to actuate the locking device in between a locking position and a release position. The invention also concerns methods for releasing a clamp.

Abstract: A closed operation subsea well tool assembly with a flushing system flushing a first fluid in the main bore (15) of the tool assembly (1). The flushing system of the tool assembly comprises a container (19) with a second fluid, a pump (2), a swab valve (20) in the top of the main bore (15), an inlet (3) in the bottom of the main bore of the tool assembly, which is connected to the pump. Outlet(s) (5a, 6a) are below the swab valve, configured to guide out the first fluid from the main bore. A fluid channel (7) extends from the outlet (5a, 6a) and down to channels of the wellhead module (10) or the wellhead (31). Methods using the tool assembly are also disclosed.

Abstract: A subsea power distribution device and system. The subsea power distribution device includes a first watertight housing accommodating at least one transformer having a primary winding and at least one secondary winding, input terminals electrically connected to the primary winding and arranged to be connected to a remote power supply, an output terminal electrically connected to the at least one secondary winding, and switches located within the first watertight housing and arranged to open and close the connections between each secondary winding and a corresponding output terminal. Each output terminal is further connected to an overcurrent breaking device which is further arranged to be connected to a subsea power consuming device. The overcurrent breaking device is arranged in a second watertight housing separate from the first watertight housing and is filled with insulating liquid.