An HVDC power cable joint assembly for jointing more than two power cables, including: a connection body including: a multi-branch conductor having at least two branches and a stem, a multi-branch conductor insulation system including: a connection body inner semiconducting layer arranged radially outside of the multi-branch conductor, a connection body insulation layer arranged radially outside the connection body inner semiconducting layer, a connection body outer semiconducting layer arranged radially outside the connection body insulation layer, N power cables, where N is the number of branches plus one, each power cable having a conductor, and a power cable insulation system surrounding the conductor, N power cable joints, each connecting a branch or the stem to a respective power cable, wherein each power cable joint includes: a conductor joint between one of the branches, or the stem, and a conductor of one of the power cables, a joint insulation system arranged around the conductor joint, the joint insulation system including a deflector layer, a field grading layer, a joint insulation layer and a joint insulation system outer semiconducting layer, and an outer cover housing the joint insulation system, and an external metal casing accommodating the connection body.

An electrical connector includes an outer case, an insulation base, an elastic airtight member and a conductive terminal. The outer case includes a main frame, and a partition member formed within the main frame to define a first slot and a second slot therein. The insulation base is fixedly connected to the main frame, and disposed within the second slot. The elastic airtight member is disposed within the second slot, and interposed between the insulation base and the partition member. The conductive terminal is disposed within the insulation base, the elastic airtight member and the partition member, and extends into the first slot from the partition member, and extending outwards the insulation base from the second slot.

A component of a subsea connector includes a conductor, an electrically insulating layer and an at least partially electrically conductive layer. A method of assembling the component includes providing the insulating layer radially outward of the conductor; and applying the at least partially conductive layer onto the insulating layer by casting, moulding, compression fitting, or additive manufacturing techniques.

An intelligent power connecting device includes two connecting units to be connected and on-off units. The connecting units have conductor parts, insulation parts, and trigger units; the on-off units are electrically connected with the trigger units; delay units can be connected in series between the on-off units and the trigger units. A short circuit or electric leakage caused by instant electric conduction of the connector in a connecting process can be avoided. Intelligent control is achieved and the short circuit or electric leakage phenomenon caused by instant electric conduction is prevented during connection in the complex environment; electrified positions of the connector are fully isolated from the external environment and the connector is intelligently controlled; the insulation parts of the connector can achieve sealing isolation, the connected positions are effectively isolated from the complex external environment, and thus the two connecting units can be intelligently connected in the complex environment.

A connector comprising a contact, a plunger, and a spring activated seal is provided. The contact is positioned within the housing and configured to transmit at least one of an electrical signal and an optical signal between the connector and a secondary device. The plunger is positioned within the housing and in communication with the contact. The spring activated seal comprises a flexible portion and a spring configured to urge the flexible portion to contact the housing and at least one of the plunger and a contact of the secondary device to form a fluid tight seal therebetween.

Systems and methods of deploying seismic data acquisition units from a marine vessel are disclosed. The system can include a mechanical attachment device comprising a cavity formed by interlocking a first member and a second member. Protrusions located on the first member and second member can increase the coefficient of friction between a rope and the mechanical attachment device responsive to an increase in tension on the rope. A lanyard can couple a seismic data acquisition unit to the mechanical attachment device.

Systems and methods of deploying seismic data acquisition units from a marine vessel are disclosed. The system can include a mechanical attachment device comprising a cavity formed by interlocking a first member and a second member. Protrusions located on the first member and second member can increase the coefficient of friction between a rope and the mechanical attachment device responsive to an increase in tension on the rope. A lanyard can couple a seismic data acquisition unit to the mechanical attachment device.

A receptacle unit of a connector for sealably engaging and disengaging contacts therein can include one or more closed inner chambers. At least one of the one or more inner chambers being configured to contain a receptacle contact. Each receptacle contact can be configured to engage a plug contact of a plug unit of a connector. A closed cavity can be at least partially in contact with each inner chamber. The closed cavity can contain a deformable material. At least a portion of the closed cavity can be configured to be movable with respect to another portion of the closed cavity to permit balancing of pressure of the deformable material within the closed cavity to pressure outside of the closed cavity.

A receptacle unit of a connector for sealably engaging and disengaging contacts therein can include one or more closed inner chambers. At least one of the one or more inner chambers being configured to contain a receptacle contact. Each receptacle contact can be configured to engage a plug contact of a plug unit of a connector. A closed cavity can be at least partially in contact with each inner chamber. The closed cavity can contain a deformable material. At least a portion of the closed cavity can be configured to be movable with respect to another portion of the closed cavity to permit balancing of pressure of the deformable material within the closed cavity to pressure outside of the closed cavity.

A submersible, high-voltage electrical connector that includes a female connector and a male connector. The female connector has an interior chamber and a conduit configured to connect the interior chamber to an evacuation pump. The male connector is configured to fit within the chamber of the female connector. The conduit of the female connector is further configured to, when the male connector and the female connector are mated, substantially evacuate any liquid from the chamber of the female connector.