Abstract: Methods and systems are described for monitoring the integrity of a subsea pipeline network to transport the production fluid from a subsurface wellhead to surface facilities. More specifically, the described methods and systems are for monitoring the integrity of a riser pipe network and can include installing one or more inclinometers to the buoyancy tank and/or vertical riser structures.

Abstract: Actuator for actuating a valve device comprising an electric drive (14) being operatively engaged to an actuating element (1) of the valve device, the electric drive (14) comprising at least one torque motor (2) which drives a hollow shaft (3) as an internal rotor, that positions a threaded drive (4) having a screw nut (6) and a threaded spindle (5) for converting the rotational movement of the hollow shaft (3) into a translational movement of the threaded spindle (5), and the threaded spindle (5) acts upon the actuating element (1) for displacing the same, wherein the threaded drive (4) comprises an inverted roller screw (4.1), and the screw nut (6) of the inverted roller screw (4.1) houses the threaded spindle (5) as a push rod.

Abstract: A load transfer profile for connection of two bodies without preloading uses a horizontal force couple instead of a vertical force couple for maximum efficiency. The load transfer profile includes a series of tapers and/or diameters that create a radial force couple separated by an axial distance. In particular, the load transfer profile includes at least a first horizontal contact and a second horizontal contact, where each contact is a landing shoulder followed by a stop shoulder or a radial protrusion. The first and second horizontal contacts are offset by the axial distance to accommodate a force-determined bending moment such that system structural fatigue capacity is optimized. A lock mechanism assists with resisting axial loads without creating preload stresses and with locking the bodies together.

Abstract: A method of controlling fluid pressure in a closed system including using a pressure regulating unit connected to the system, the unit including a first conduit fluidly connecting the closed system to an external system. A first regulating valve is interposed between the external system and one end of the conduit and a second regulating valve interposed between the closed system and the other end of the conduit. The method further includes: a) opening one of the first or second regulating valves; b) closing said one regulating valve; c) opening the other regulating valve; d) closing the other regulating valve; and e) repeating steps a) to d) in turn until the desired fluid pressure is achieved in the system.

Abstract: A releasable locking mechanism 20 for use in a downhole well 10 is provided. The releasable locking mechanism 20 is suitable for use in a cable termination assembly 11. The cable termination assembly 11 is coupled to a downhole apparatus 12 and is configured for coupling a cable line 13 thereto. The releasable locking mechanism 20 includes an extension tube 21 adapted to be coupled to the cable line 13, and a base assembly 23 adapted to be coupled to the cable termination assembly 11. The extension tube 21 and the base assembly 23 are adapted to releasably engage each other in such a manner that when a tensile load in the cable line 13 exceeds a predefined threshold value, the extension tube 21 and the base assembly 23 are disengaged.

Abstract: An electrode includes a conductor, an insulator, and a housing. The insulator is positioned at least partially around the conductor. The housing is positioned at least partially around the conductor. An upper surface of the insulator may be at least partially concave, an outer surface of the housing may have a groove formed therein, or both.

Abstract: A system and method for accessing a well, in certain embodiments, includes a production tree, a cap, and a spool including a longitudinal bore configured to receive a tubing hanger. The tubing hanger includes a longitudinal bore configured to transfer product between the spool and the production tree. At least one adjustable fluid barrier is included in the tubing hanger and/or the cap. The adjustable fluid barrier can be used to open and close the longitudinal passage and allow access through the tubing hanger and/or the cap.

Abstract: A high pressure swivel system provides fluid communication on a turret-moored vessel between a swivel core member being in fixed rotational alignment with a seabed mooring system and a swivel revolving member being in fixed rotational alignment with the hull of the vessel. The revolving member has upper and lower radially extending surfaces. On each of the radially extending surfaces are a series of radially spaced apart pressure seals. Hydraulic barrier fluid pressure is regulated in each of the volumes formed between the pressure seals. The pressures in the volumes are regulated such that a process fluid pressure higher than could be tolerated by any one individual pressure seal is safely accommodated by sharing the high process fluid pressure between or among two or more of the radially spaced apart pressure seals.

Abstract: A gate valve assembly for use with a tubing hanger with a vertical bore, the gate valve including a housing located externally to the tubing hanger and a gate at least partially locatable in the housing and configured to extend through the tubing hanger and into the tubing hanger vertical bore. The gate valve assembly also includes a seat assembly having a seat and located within the tubing hanger, the seat assembly configured to seal against the gate when the gate is extended into the tubing hanger vertical bore.

Abstract: A fluid flow control assembly includes a first pipe-in-pipe assembly comprising an inner tubular member disposed in an outer tubular member, wherein the inner tubular member comprises an inner bore and an annulus is formed between the inner tubular member and the outer tubular member, a terminating bulkhead assembly coupled to the first pipe-in-pipe assembly, wherein fluid communication is provided between a bore of the bulkhead assembly and the inner bore of the inner tubular member while fluid communication is restricted between the bore of the bulkhead assembly and the annulus of the first pipe-in-pipe assembly, and an annulus conduit coupled to a radial port of the first pipe-in-pipe assembly, wherein fluid communication is provided between the annulus conduit and the annulus of the first pipe-in-pipe assembly while fluid communication is restricted between the annulus conduit and the inner bore of the inner tubular member.

Abstract: A technique facilitates coupling of an electrical actuator (20) with a subsea host (22). Effectively, mechanical and electrical connections are both formed during movement of the electrical actuator into engagement with the host. The electrical actuator is moved to a desired host location, and then the electrical actuator is guided into mechanical engagement with the host. During movement of the electrical actuator into mechanical engagement, a drive member (60) and at least one electrical connector (56, 58) of the actuator are operatively coupled with corresponding features of the host, thus enabling engagement of the actuator and host with a simple installation motion.

Abstract: The present disclosure relates to providing a hub coupled into a production tree, manifold, or other equipment, and a base module that is attachable to and retrievable from the hub. The base module may be reconfigurable. The base module may be configured to receive other modules that are reconfigurable, wherein the other modules are retrievable from the base module. The hub provides a dedicated space or support at or near the production tree or equipment for using the base module. An interface is provided between the base module and the production tree. A fluid conduit provides a fluid path across or through the interface. The hub may be part of the interface such that the module can fluidly couple to the fluid conduit and the production tree across the interface via the hub.

Abstract: An apparatus includes a first contact to be electrically connected to a first cable segment and a second contact to be electrically connected to a second cable segment. The apparatus includes a spring to absorb a loading placed on the first contact. The spring is adapted to form at least part of an electrical communication path between the first cable segment and the second cable segment.

Abstract: A system may include a seal including first and second lip portions and an inner portion disposed between the first and second lip portions. The first and second lip portions may be formed from a different material than the inner portion. Additionally, the first and second lip portions may be configured to block the flow of fluid to the inner portion. Further, the first and second lip portions may be configured to block extrusion of the inner portion.

Abstract: A subsea system is configured to inject seawater into a subterranean formation. The system includes a sub-micron filtration module and a plurality of pumps and a plurality of other filtering devices arranged in series.

Abstract: An ROV-mountable flush and sample skid is described that reduces the project cost and deliveries, and also improves HSE risk during Subsea Pump installation campaigns. The ROV skid can be configured as part of a standard ROV tooling across different projects. The tool also reduces the total pump module installation weight that is important in deepwater applications. The ROV-mountable flushing and sampling skid is mounted to an ROV and deployed to a subsea location to provide flushing of and sampling of barrier oil from a barrier oil supply jumper from an subsea umbilical termination assembly. The Subsea pump flushing and sampling ROV skid includes of a set of flush accumulators with enough capacity to flush the installed jumpers clean, and also one or more sample accumulators configured to sample the barrier oil after the flushing has been performed.

Abstract: A subsea pump is used in applications such as deep-water boosting of fluid produced from a wellbore. The process pressure variation is mostly related to the pump suction side in such applications. The barrier fluid system for the pump regulates its pressure according to the pump discharge pressure. A balance piston is positioned in a location close to the pump inlet such that both mechanical seals are exposed to the pump discharge pressure on the process side.

Abstract: A subsea flowline jumper connector includes at least one electronic connector deployed thereon. The sensor may provide data indicative of the connector state during installation and production operations.

Abstract: A riser intervention system for use with a subsea test tree includes a lower riser package spool, an intermediate spool, and a riser stress joint. The lower riser package spool may include a bore and a shoulder projecting into the bore such that the subsea test tree is landable on the shoulder within the lower riser package spool. The intermediate spool is connectable to the lower riser package spool to secure the subsea test tree within the bore of the lower riser package spool such that the lower riser package spool is in fluid communication with the intermediate spool. The riser stress joint is releasably connectable to the intermediate spool using such that the intermediate spool is in fluid communication with the riser stress joint.

Abstract: A well integrity monitoring system may include one or more sensing elements that are configured to generate feedback indicative of an integrity of a well. The one or more sensing elements may be disposed in at least one annulus of wellhead assembly. Additionally, the well integrity monitoring system may include a controller coupled to the wellhead assembly. The controller may be configured to wirelessly determine the feedback from the one or more sensing elements.