A subsea housing assembly has a subsea housing with first and second housing portions having first and second electrical connections for data communication with a separating wall. An inductive coupler has first and second coupling sections disposed in the first and second housing portions and provides inductive coupling across the wall for data communication between the first and second electrical connections. The inductive coupler has inner and outer coils. The outer coil at least partly surrounds the inner coil and at least part of the wall extends between the inner and outer coil. Soft magnetic material is arranged around the outer coil and/or inside the inner coil where magnetic flux is collected and guided from the outer to the inner coil and/or from the inner to the outer coil. A support structure is provided around and/or inside the part of the wall extending between the inner and outer coil.

A Christmas tree includes a main body, an bulkhead connector, a wet-mate connector, a cable, and a sensor. The main body has a first and a second main body end, and a further passage, and encloses a main passage. The further passage includes a first further passage end at a main body exterior and a second further passage end at the main passage, and extends from the first to the second further passage end. The bulkhead connector is secured to the main body exterior to close the first further passage end, and has a first and a second electrical connection. The wet-mate connector is mounted in the second further passage end to close the second further passage end. The cable transmits an electrical signal and connects the first electrical connection to the wet-mate connector. The sensor is arranged in the further passage and electrically connects to the second electrical connection.

An umbilical termination head (1) for connection of a multi-bore flying lead or umbilical (2) to a structure (10), the flying lead or umbilical comprising multiple conduits (7) leading to couplers (4) being arranged on a connector part (3), the umbilical (2) being provided with an end fitting (9) onto which a bracket arrangement (8, 19, 20) is mounted, the connector part (3) being mounted to a bracket (8) of the bracket arrangement. A guide means (11) is arranged on the bracket (8) in such a way that an interacting guide means (12) on the structure (10) lead the umbilical termination head (1) onto the structure (10) for connection of the couplers (4) to corresponding couplers (6) on the structure (10).

Downhole connection assemblies include a connector to receive a conductor and pin at opposite ends. The connector includes a first electrical collet, a separate second electrical collet and a sleeve. The first collet includes a first recess in a first end to receive the conductor and a second recess in a second end to receive the pin. The second collet is positioned around the pin and separated from the first collet. The sleeve is positioned around the pin, first collet and the second collet. Downhole cables include a center electrical conductor, a first insulator positioned around the center conductor, a second insulator positioned around the first insulator, and a pressure tube surrounding the second insulator. The cable further includes one or more slots extending axially along a length of the second insulator, or one or more slots extending axially along an inner diameter of the pressure tube.

Systems and methods include a system for controlling a downhole multi-circuit switch using a downhole actuator mechanism. A command is sent, by a surface controller coupled to downhole electrically-powered equipment in a wellbore of a well, to change electrical power flow in a multi-circuit switch to a specified position of multiple positions. A connection between the surface controller and the downhole electrically-powered equipment includes at least two separate input electrical connections for supplying electrical power to the downhole electrically-powered equipment. The command is received by a downhole actuator mechanism from the surface controller. The command indicates to switch from a first electrical connection of the at least two separate input electrical connections to a second electrical connection of the at least two separate input electrical connections. The multi-circuit switch is switched by the downhole actuator mechanism based on the command to change a power source of the downhole electrically-powered equipment, including isolating a first input electrical connection.

A system for use in hydrocarbon production includes a well that has a wellhead and extends downhole into a reservoir. The wellhead has a passageway that extends through a sidewall thereof. The system includes piping extending from the wellhead at the passageway. A downhole electrical device is disposed downhole in the well. A cable is coupled to the downhole electrical device and includes electrical wires extending from the downhole electrical device, out of the wellhead, through the passageway in the sidewall, and along the piping. A cooling section is disposed along the piping through which the electrical wires pass, and an electrical connector is coupled to the electrical wires for electrical connection thereto such that the wires extend along the cooling section between electrical connector and the wellhead.

Dynamic/static sealing of coiled tubing subsea for pipeline and well access with hydrostatic conditions up to 10,000 feet water depth while maintaining wellbore or pipeline pressures up to 10,000 psi may be achieved using a system comprising a subsea fluid source which utilizes a riserless open water coiled tubing system and an open water coiled tubing sealer to control hydrostatic pressure and fluid container pressures. This comprises an upper well control assembly having a first geometric orientation and a lower well control assembly in fluid communication with the upper well control assembly aligned in a second geometric orientation substantially inverted to the first orientation; a quick disconnect connector in fluid communication with the upper well control assembly; one or more electrically powered subsea assist jacks operatively connected to the quick disconnect connector; a controller operatively in communication with the electrically powered subsea assist jacks; and a power connector operatively in communication with the source of electrical power, the controller, and the electrically powered subsea assist jack.

Downhole connection assemblies include a connector to receive a conductor and pin at opposite ends. The connector includes a first electrical collet, a separate second electrical collet and a sleeve. The first collet includes a first recess in a first end to receive the conductor and a second recess in a second end to receive the pin. The second collet is positioned around the pin and separated from the first collet. The sleeve is positioned around the pin, first collet and the second collet. Downhole cables include a center electrical conductor, a first insulator positioned around the center conductor, a second insulator positioned around the first insulator, and a pressure tube surrounding the second insulator. The cable further includes one or more slots extending axially along a length of the second insulator, or one or more slots extending axially along an inner diameter of the pressure tube.

The plug in, re-useable field-attachable wellhead penetrator provides an economic means of attachment of continuous electrical conductors through a wellhead. A rubber seal and non-ferromagnetic guide are retained on the upper end of the mandrel allowing the conductors extending there through to be connected to electrical sockets then inserted in an insulating block. Epoxy can be used within the mandrel and is easily removed because the inner diameter of the mandrel is coated with tetrafluoroethylene or other slick coatings.

A subsea housing assembly, in particular for a subsea sensor, is provided. A subsea housing includes a first housing portion and a second housing portion. The first housing portion includes a first electrical connection for data communication and the second housing portion includes a second electrical connection for data communication. A wall provides separation between the first housing portion and the second housing portion of the subsea housing. An inductive coupler, that includes a first coupling section disposed in the first housing portion and a second coupling section disposed in the second housing portion, is provided. The inductive coupler is configured to provide inductive coupling across the wall for providing at least a data communication between the first and second electrical connections.