Abstract: A pump in which an electric motor which is connected to a rotor provided with at least one pump vane is integrated into a pump casing. The electric motor is a ring motor surrounding at least a portion of a fluid flow path through the pump. A stator is arranged internally in an intermediate section of the pump casing and surrounds the rotor. The rotor, which is supported in the pump casing, is cylinder-shaped and forms an intermediate portion of the fluid flow path, and the at least one pump vane is attached internally in the rotor.

Abstract: An actuator device includes a housing, parallel rolling screws supported in the housing, an actuator element, an actuator spindle anchored in the actuator element, a control system, sensor heads, and position sensors. Each rolling screw is coupled to an electric motor and engages a roller nut. Rotating the rolling screws axially displaces the rolling nuts. The actuator element engages with each rolling nut. One sensor head is arranged on the actuator element near each roller nut. One position sensor is fastened in the actuator adjacent each sensor head and communicates position information of each sensor head to the control system. Each electric motor has an encoder coupled to the control system. The encoder provides a primary motor control. The control system compares information from each position sensor with information from the encoder. The information from each position sensor acts as a secondary position control of the actuator element.

Abstract: A packer arrangement for a sealed passage of a drillstring therethrough. The drillstring has geometric differences between passing drill pipes and joint couplings. The packer arrangement includes a packer holder which forms a housing with an axially through-going center passage which has a flexible packer sleeve arranged in a portion thereof, an external annulus which encloses the packer holder, an internal annulus, and two actuators which apply an axial tensile force to the flexible packer sleeve. The flexible packer sleeve has a center portion and two end terminations which are axially displaceable in the packer holder. The internal annulus is delimited by the center portion of the flexible packer sleeve and by the packer holder. The internal annulus is in a fluid communication with the external annulus. Each of the two end terminations is coupled to one of the two actuators, respectively.

Abstract: A pump in which an electric motor which is connected to a rotor provided with at least one pump vane is integrated into a pump casing. The electric motor is a ring motor surrounding at least a portion of a fluid flow path through the pump. A stator is arranged internally in an intermediate section of the pump casing and surrounds the rotor. The rotor, which is supported in the pump casing, is cylinder-shaped and forms an intermediate portion of the fluid flow path, and the at least one pump vane is attached internally in the rotor.

Abstract: An electromechanical actuator with a through-going center passage for use under water, wherein the motor and transmission elements are arranged in parallel with and are via dog elements mechanically coupled to the axially displaceable elements through a sealing partition. A hydraulic axially displaceable piston ring facilitates secondary release of locking segments in a coupling device.

Abstract: An actuator is for use in petroleum exploitation and is configured for displacing a rod for engaging a well barrier device. The actuator has a housing for at least a portion of the rod; at least two roller screws rotatably arranged in the housing; rotational means connected to the roller screws via one gear systems for each roller screw for simultaneous rotation of the roller screws; and a roller nut engaging each roller screw. The roller screws and roller nuts are configured such that rotation of the roller screws result in displacement of the roller nuts relative to the roller screws. Each roller nut is coupled with one actuation element via spherical bearings, and each actuation element is configured for mechanical coupling to an end portion of the rod for displacing the rod in operational use.

Abstract: A force actuator including an actuator housing, in which, via transmission elements, an electric motor is arranged to drive a displaceable roller screw along the longitudinal axis of the force actuator, and in which a rotatable roller cage which is in engagement with the transmission elements is provided with at least one threaded roller, the threaded roller being in threaded engagement with the roller screw, and the roller screw being prevented from rotating around the longitudinal axis.

Abstract: A valve arranged to close a flow path extending through it, on the loss of an electrical voltage supplied to a driving motor of an actuation element, the driving motor, which comprises a stator and a rotor, being arranged to, via transmission elements, displace the actuation element between at least a first position, in which the actuation element is arranged at a distance from a spring-loaded, rotatable valve element, and a second position, in which the actuation element holds the spring-loaded, rotatable valve element in an open position, the rotor of the driving motor surrounding and being connected to a roller nut which is provided with a number of supported thread rollers which are distributed around and are threadedly engaged with the actuation element, the actuation element being a flow pipe which forms a flow path and is axially displaceable away from its second position by means of an actuator spring.

Abstract: A gripping device is adapted for handling equipment with a drill string, wherein an annular actuator housing includes a hydraulically activated, rotatable cam disc which is arranged to displace a number of locking slides from a first position, in which the locking slides are retracted into the actuator housing, and a second position, in which the locking slides are in engagement with the drill string extending through a center opening in the gripping device, by abutting against a shoulder of a tool joint in the drill string. The gripping device is connected to a hydraulic supply and return for the actuation of the cam disc via a hydraulic coupler in a connection port on the actuator housing. Alternatively pressurizing and ventilating two adjacent actuation volumes in the cam disc brings about rotation of the cam disc within a sector of the cam disc.

Abstract: An actuator is for use in petroleum exploitation and is configured for displacing a rod for engaging a well barrier device. The actuator has a housing for at least a portion of the rod; at least two roller screws rotatably arranged in the housing; rotational means connected to the roller screws via one gear systems for each roller screw for simultaneous rotation of the roller screws; and a roller nut engaging each roller screw. The roller screws and roller nuts are configured such that rotation of the roller screws result in displacement of the roller nuts relative to the roller screws. Each roller nut is coupled with one actuation element via spherical bearings, and each actuation element is configured for mechanical coupling to an end portion of the rod for displacing the rod in operational use.

Abstract: A valve arranged to close a flow path extending through it, on the loss of an electrical voltage supplied to a driving motor of an actuation element, the driving motor, which comprises a stator and a rotor, being arranged to, via transmission elements, displace the actuation element between at least a first position, in which the actuation element is arranged at a distance from a spring-loaded, rotatable valve element, and a second position, in which the actuation element holds the spring-loaded, rotatable valve element in an open position, the rotor of the driving motor surrounding and being connected to a roller nut which is provided with a number of supported thread rollers which are distributed around and are threadedly engaged with the actuation element, the actuation element being a flow pipe which forms a flow path and is axially displaceable away from its second position by means of an actuator spring.

Abstract: A gripping device is adapted for handling equipment with a drill string, wherein an annular actuator housing includes a hydraulically activated, rotatable cam disc which is arranged to displace a number of locking slides from a first position, in which the locking slides are retracted into the actuator housing, and a second position, in which the locking slides are in engagement with the drill string extending through a center opening in the gripping device, by abutting against a shoulder of a tool joint in the drill string. The gripping device is connected to a hydraulic supply and return for the actuation of the cam disc via a hydraulic coupler in a connection port on the actuator housing. Alternatively pressurizing and ventilating two adjacent actuation volumes in the cam disc brings about rotation of the cam disc within a sector of the cam disc.

Abstract: A packer box for use in petroleum drilling is described, in which a rotatable packer element arranged centrically in a packer retainer that is orientable and lockable in a sealing position in a housing in the packer box is arranged to seal against a passing drill string, the packer element comprising a mounting device provided with packer slide rings at the ends of the mounting device and being in sealing abutment against slide rings arranged internally in the packer retainer, and an internal, flexible packer sleeve which is arranged to abut sealingly against the drill string with an external pressure from a fluid in a volume-compensated annular space in the packer retainer, wherein the mounting device includes several channels perforating the mounting device, and clamping devices for fixing the packer sleeve to the end portions of the mounting device. A method of installing or withdrawing a packer element in, respectively from, a packer box is described as well.

Abstract: A force actuator including an actuator housing, in which, via transmission elements, an electric motor is arranged to drive a displaceable roller screw along the longitudinal axis of the force actuator, and in which a rotatable roller cage which is in engagement with the transmission elements is provided with at least one threaded roller, the threaded roller being in threaded engagement with the roller screw, and the roller screw being prevented from rotating around the longitudinal axis.

Abstract: A packer box for use in petroleum drilling is described, in which a rotatable packer element arranged centrically in a packer retainer that is orientable and lockable in a sealing position in a housing in the packer box is arranged to seal against a passing drill string, the packer element comprising a mounting device provided with packer slide rings at the ends of the mounting device and being in sealing abutment against slide rings arranged internally in the packer retainer, and an internal, flexible packer sleeve which is arranged to abut sealingly against the drill string with an external pressure from a fluid in a volume-compensated annular space in the packer retainer, wherein the mounting device includes several channels perforating the mounting device, and clamping devices for fixing the packer sleeve to the end portions of the mounting device. A method of installing or withdrawing a packer element in, respectively from, a packer box is described as well.

Abstract: A method of heave compensation between a floating installation, which has a drilling floor, and at least a riser or a pipe extending down towards, possibly through, a blowout preventer, the method including the steps of—installing an electromechanical actuator with attachment points, in the form of an end cap and an anchoring point, between the floating installation and a suspension device for the riser or the pipe; connecting the electromechanical actuator to a power supply and a control system; and heave-compensating for the relative displacement between the floating installation and the riser or the pipe by letting the control system adjust the length and power output of the electromechanical actuator.

Abstract: A pipe connection and a method for sealingly connecting pipes which, in their opposite end portions, are provided with removable rings arranged in grooves provided in the peripheries of the pipes, the pipe connection being provided with a first nut, which is provided with an internally threaded portion and is arranged to encircle the end portion of the first pipe and has a shoulder portion which may abut in an axially supporting manner against said ring, and a second nut, which is provided with an externally threaded portion and is arranged to encircle the end portion of the second pipe and abut with a shoulder portion in an axially supporting manner against said ring, and the nuts are in threaded engagement with each other and are arranged to press radial pipe-end faces of the pipes against an axially supporting portion of a seal and pipe carrier.

Abstract: A method of heave compensation between a floating installation, which has a drilling floor, and at least a riser or a pipe extending down towards, possibly through, a blowout preventer, the method including the steps of—installing an electromechanical actuator with attachment points, in the form of an end cap and an anchoring point, between the floating installation and a suspension device for the riser or the pipe; connecting the electromechanical actuator to a power supply and a control system; and heave-compensating for the relative displacement between the floating installation and the riser or the pipe by letting the control system adjust the length and power output of the electromechanical actuator.

Abstract: Device for measurement of fluid pressure by means of an arrangement of strain gauges provided on a sensor head arranged on an item arranged to be exposed to a pressurized fluid against an external sensor head surface, where the sensor head comprises a fastening portion attached to the item, and a center portion connected to the fastening portion by means of at least one flexible connecting element, the arrangement of strain gauges is attached to the center portion of the sensor head on an internal assembly surface arranged in close proximity to a contact face on an end stopper which in an active condition encircles the arrangement of strain gauges, and the assembly surface is inexposable for the pressurized fluid.

Abstract: An electromechanical actuator device (17) and method for use under water in petroleum activity, in which, via a transmission element (30, 34, 36), an electric motor (18), including a stator (20) and a rotor (22), is arranged to move an actuation element (36) between at least a first position and a second position, and in which the rotor (22) of the electric motor (18) surrounds and is connected to an actuator nut (30) which is in threaded engagement with the actuation element (36).