Abstract: An internal tree cap having a running configuration and a latched configuration to be selectively secured to a tree spool. The tree cap may include an inner sleeve movable between upper and lower positions. The movement of the inner sleeve to the lower position may simultaneously engage a locking profile within the tree spool and energize a sealing element around the exterior of the tree cap. The tree cap may be a low profile tree cap that is flush with the top of the tree spool when installed. The tree cap may provide a collateral beneficial locking means to secure a tubing hanger within the tree spool. A lower housing may be attached to the tree cap to seal on the exterior of the upper neck of the tubing hanger. The tree cap may include a profile to accept a wireline plug.

Abstract: A method for protection of compressor modules against undesirable influx of contaminated gas, comprising a pressure housing (3) which by means of one of more sealing elements (4) is generally divided into a first compartment (8) equipped with a compressor (2) and a second compartment (7) equipped with a gas-filled motor (1), the compressor and the motor being drivably connected to each other by at least one shaft (9), is distinguished by protecting the second compartment (7) with motor (1) against direct influx of contaminated gas from the first compartment (8) with compressor (2) by means of compressed gas that is supplied from a withdrawal point (13) at the first or intermediate stage of the compressor, or from the compressor outlet (16), and by introducing the compressed gas directly into the seal (4) or in between two or more seals so as to flow through the at least one seal (4) back to the first compartment (8). The invention also relates to an apparatus for use in connection with the method.

Abstract: An electrically operated hydraulic valve comprises a valve assembly that provides a common valve passageway, an inlet port, an outlet port and a return port connected to the passageway and an axially movable valve device which allows in a first position fluid flow between the outlet port and the return port while closing the inlet and in a second position, axially displaced from the first position, fluid flow between the inlet port and the outlet port while closing the return port. A spring provides a restoring force urging the valve device to its first position. An electrically operated actuator coupled to the valve device comprises a permanent magnet and a cooperating electrical coil having an associated magnetic core, one or other of the magnet and the coil constituting a stator and the other constituting an armature which is coupled to the valve device to move it from the first position to the second position.

Abstract: A subsea production station (SPS) including at least a production manifold and a multi phase pump unit (MPP) for subsea operation is shown. Each of them has respective modules for control/operation operatively connected to at least a floating production storage and offloading unit (FPSO), subsea umbilicals, risers, flow lines, subsea wells, installations such as X-mas tree and other units in the system. The manifold (4) is adapted for its application for producing hydrocarbons from a plurality of wells. The pump unit (7) is adapted to add kinetic energy along the flow lines. The manifold (4) and the pump unit (7) are integrally disposed adjacent to one another on a common foundation (2) and are adapted to have a common support structure and common suction anchor (1).

Abstract: An umbilical field connect assembly comprising: a first umbilical portion comprising two or more first bundled members chosen from electrical cables, fluid conduits, and optical fibers; a second umbilical portion comprising two or more second bundled members chosen from electrical cables, fluid conduits, and optical fibers; a first housing assembly having a first end coupled to the first umbilical portion and a second end comprising a first coupling plate having a plurality of first couplings chosen from male and female couplings positioned therein, one of the plurality of first couplings being positioned at an end of each of the first bundled members; a second housing assembly having a third end coupled to the second umbilical portion and a fourth end comprising a second coupling plate having a plurality of second couplings chosen from male and female couplings positioned therein, one of the second couplings being positioned at an end of each of the second bundled members.

Abstract: A subsea female coupler has a body defining a socket for the reception of a probe of a male coupler. The socket includes an annular shoulder and, outwardly of the shoulder, a part-conical seat which tapers towards the interior of the socket. An annular seal is disposed to provide radial sealing between the socket and the probe and is positioned in the annular shoulder. A metal retainer in the form of a securing ring, which has a bevelled rim for abutment with the seat, provides sealing between the region of the seal and the exterior of the body of the coupler. The retainer has a screw-threaded periphery for engagement with a complementary thread on the interior of the socket. An inner ring liner fits within the retainer and has a flange for abutting the seal.

Abstract: A valve for use in connection with oil production and gas production comprising a valve housing (1) which is connected to at least one inlet (2) and an outlet (3), which together define a flow channel (16) through the valve, a valve body (9), which is set up to selectively open and close for fluid flow in the flow channel (16). A valve seat (6,7), is fitted with at least one seal against the valve housing (1), the valve seat (6) is fitted with an undercut (31) on the side of the valve seat that faces the valve body (9). The undercut (31) is in direct fluid communication with the flow channel (16).

Abstract: Well template (11) for the protection of equipment for wells on the sea bed, comprising outer, upper template parts (17a, 17b) and flippable protection hatches (15) which, in a closed position, protect well slots. The protection hatches (15) are mounted so that they can flip up about two non-parallel flip axes.

Abstract: A locking tree cap for use on a subsea tree. The tree cap may be installed and retrieved using a remote operated vehicle. The tree cap may include deflectable collet fingers that lock the tree cap to a tree spool. The deflectable collet fingers may be adapted, such as with enlarged heads, to extend into recesses of the tree spool when the tree cap has been landed on the tree spool. The tree cap may be locked onto a tree spool before energizing sealing members within the bores of the subsea tree, thereby protecting the sealing members from damage during the installation of the tree cap onto the tree spool. The tree cap may include soft landing means such as a plastic cap, on the end of stabs to protect the sealing members as the tree cap is landed. The tree cap may include a secondary locking mechanism used to further secure the tree cap to the tree spool.

Abstract: A connector means (10; 20) for tie-in and connecting of a first pipeline and a second pipeline on the seabed is shown. The connector means comprises a first connector part (1; 1?) retaining a first end of the first pipeline. The first connector part and the first pipeline are designed to be lowered and deployed on the seabed in advance of the connecting operation. A submersible second connector part (2; 2?) that retains a second end of the second pipeline (4) is also included. The second connector part and the second pipeline are designed to be lowered from the surface of the water toward the first connector part (1; 1?).

Abstract: A control valve which comprises a body (2) including an internal passageway (3) and is constituted at one end (6) as a coupler which includes a valve poppet (7) openable to allow fluid access to or from the passageway past the poppet. The body defines at least one lateral port (11 or 12). A valve spool (13) is disposed within the body and is movable lengthwise of the body by a solenoid actuator (18), disposed at the other end of the body (3), to control fluid communication between the passageway (3) and the lateral port (11 or 12).

Abstract: The present invention relates to a system and method for monitoring subsea equipment performance and for providing early warning for equipment maintenance, comprising at least one sensor coupled to said equipment and arranged to measure at least one performance indicator value and a calculation unit for sampling the measured indicator values at a chosen rate, and from the sampled data estimating a likely future development of the sampled value and estimating the time for the passing of a chosen threshold value, the threshold value being a critical value requiring repair of replacements of said equipment, the system being adapted to provide a signal indicating the calculated time of repair/replacement.

Abstract: The invention relates to a monitoring system and method for accumulator banks including at least two pressure accumulators, the accumulator bank is coupled to a device and being adapted to provide a pressurized fluid into the device at pressure reductions in said device. The monitoring system comprises at least one sensor for detecting a chosen parameter in the accumulator bank at chosen intervals of time, and a recording unit for recoding the sampled measured parameters, a storage device for storing predetermined characteristic information related to the pressure development in the accumulator bank during pressure reductions at the device and representing different numbers of active accumulators in the accumulator bank, and calculation means for comparing the recorded measured parameters with the stored characteristic information, and determining from this comparison the number of active accumulators in the accumulator bank.

Abstract: A method of transmitting on a transmission line a set of carrier signals of which at least one component represents a respective data value and the carrier signals are of different frequencies ranging from a lowest frequency to a highest frequency, in which the respective component of each carrier above the lowest frequency is adjusted on transmission in accordance with a selected relationship between that respective component and the corresponding component of the next lower frequency so as to compensate for the frequency-dependent effect of the transmission line on those components. The components may be amplitudes. The relationship may be a ratio of the respective and corresponding components.

Abstract: A pressure actuated seal carrier assembly includes a seal carrier with a body with an inner and an outer projection that are integral with the body and opposite to one another. An inner groove with a first seal is formed in the inner projection, and an outer groove with a second seal is formed in the outer projection. As pressure enters the cavity, the projections are forced radically outward and inward, which maintains contact with the mating surfaces, thus excluding any no extrusion gaps between the seal carrier and the walls of the pressurized space. A spacer is located in the cavity to maintain space between the grooves and bear the axial load.

Abstract: A retrievable tree cap for use on a subsea tree having a concentric bore. The tree cap may be installed and retrieved using a remotely operated vehicle. Hydraulic pressure may be used to lock the tree cap onto the subsea tree and to set the tree cap seals. The tree cap is locked onto the subsea tree before setting the seals within the concentric bore. The tree cap includes a locking means that may engage a profile within the subsea tree regardless of the radial orientation of the tree cap. The tree cap may be used to hydraulically isolate an annulus bore from the production bore of the subsea tree. The tree cap may provide for the injection of a corrosion inhibitor within a cavity of the tree cap and may also provide for the removal of water trapped between the tree cap and the subsea tree.

Abstract: A power umbilical is shown that comprises a number of power cables (4) to transfer large amounts of electric power, optionally electric wires and/or optical conductors (5), filler material (2, 3) in the form of rigid elongated plastic elements that are located at least partially around and between the power cables (4) and the optional wires/conductors (5), and they are collectively gathered in a twisted bundle by means of a laying operation. A protective jacket (1) encompasses the power cables (4), the optional wires/conductors (5), the filler material (2, 3), and at least one load carrying element (6) predetermined located in the cross section of the power umbilical. The power cables (4), the optional wires/conductors (5), the filler material (2, 3) and the at least one load carrying element (6), are alternately laid, i.e. by continuously alternating direction, in the entire or part of the longitudinal extension of the power umbilical.

Abstract: A subsea gas compressor module having a housing comprising a sealing element generally defining within the pressure housing a first compartment holding as compressor and a second compartment holding an electric motor, the compressor and motor being driveably connected by at least one shaft. The first compartment is connected to an inlet line and an outlet line for sealing hydro carbon gas and for discharging gas. The second compartment has magnetic bearings for supporting the at least one shaft, and a pressure and volume regulator is fluidly connected to the second compartment and a gas supply, and includes elements for sensing respective pressures in the inlet and outlet lines whereby, based on the magnitude of sensed pressure, the pressure and volume regulator controls the pressure at which gas is injected into the second compartment.

Abstract: A connector means (10; 20) for tie-in and connecting of a first pipeline and a second pipeline on the seabed is shown. The connector means comprises a first connector part (1; 1?) retaining a first end of the first pipeline. The first connector part and the first pipeline are designed to be lowered and deployed on the seabed in advance of the connecting operation. A submersible second connector part (2; 2?) that retains a second end of the second pipeline (4) is also included. The second connector part and the second pipeline are designed to be lowered from the surface of the water toward the first connector part (1; 1?).