A stranded conductor (2) including a specific number of a first type of wire (5) which, in cross-section of the stranded conductor, are arranged in a hexagonal pattern around a central wire in at least two layers. The wires arranged at the vertices of the hexagonal pattern are of a second type of wire having in principle a smaller diameter than the first type of wires. The interstitial spaces (10) between the first and the second wires are filled by a sealing agent (3).

A method can include extruding an electrically insulating elastomeric compound about a conductor where the electrically insulating elastomeric compound includes ethylene propylene diene monomer (M-class) rubber (EPDM) and an alkane-based peroxide that generates radicals that form decomposition products; cross-linking the EPDM via radical polymerization to form an electrically insulating layer about the conductor; heating the cross-linked EPDM to at least 55 degrees C. to reduce the concentration of the decomposition products in the electrically insulating layer; and disposing a gas barrier layer about the electrically insulating layer.

A water blocking layer/sheathing is provided for subsea power cables made from a CuNiSi-alloy.

A submarine power cable is provided having stranded conductor(s) and an insulation system, each individual stranded conductor, at given intervals, being compressed across an area to form a plurality of watertight partitions along a length of the of the submarine power cable. A method provides a plurality of watertight partitions along a length of the submarine power cable. The method includes, at a given point, arranging a compression tool around an outer circumference of the stranded conductor, using the compression tool to compress the stranded conductor, releasing the compression tool from the stranded conductor, and repeating the compression at a number of different points and using the compression tool to compress the stranded conductor at each of these points, thereby forming a plurality of watertight partitions along the length of the submarine power cable.

Process for manufacturing a power cable includes: providing a power cable core having an electric conductor; providing a copper foil; providing a protective strip over the power cable core, the protective strip having a radially inner and outer surface and being made of copper with a coating; folding the copper foil around the power cable core so as to bring two longitudinal copper foil rims to contact one to the other; welding the two contacted longitudinal copper foil rims thus obtaining a copper sheath in form of a tube with a welding seam; reducing the diameter of the copper sheath to put it into direct contact with the power cable core and the protective strip; heating the protective strip and the copper sheath at a temperature higher than the melting temperature of the coating of the strip so that the coating fuses in the welding seam.

An apparatus for generating acoustic waves in a medium to stimulate oil recovery within an oil reservoir, the apparatus being operable with a single moving part—a central rotor.

A high voltage DC power cable designed for voltages of 320 kV or higher, including: a multi-wire conductor, an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor, a solid insulation system arranged around the inner semiconducting layer, and a water-blocking compound configured to restrict water migration into the high voltage DC power cable.

A solid ring-conductor assemblage (20) blocks water from migrating in the axial direction of an electrical stranded conductor (1). The solid ring-conductor assemblage (20) has a ring and an electrical stranded conductor. The diameter of an initial opening of the ring exceeds an outer diameter of the stranded conductor (1). The solid ring-conductor assemblage (20) is obtained by the process of placing the ring in an installed position where the electrical stranded conductor (1) runs through the initial opening. A compressive force (F) is applied onto the ring (2) in the installed position thereby compressing the ring (2) as well as the portion of the electrical stranded conductor (1) as covered by the ring into a compressed state. The compressed ring and the compressed portion of the electrical stranded conductor bonds as an entity providing the solid ring-conductor assemblage (20). A ring is provided to obtain the solid ring-conductor assemblage; a cable has a stranded electrical conductor where at least one ring is compressed around the electrical stranded conductor; and a method includes manufacturing an electrical stranded conductor arranged with at least one solid ring-conductor assemblage.

A wire harness includes an electric wire bundle and an exterior member for electric wire. The exterior member for electric wire includes a tubular exterior body for protecting the electric wire bundle, a slit formed in the exterior body along an exterior axis of the exterior body, and an inner portion continuous with a circumferential end portion of the exterior body. The inner portion is disposed on an outer side of the exterior body before the electric wire bundle is accommodated. Further, the inner portion is formed with an electric wire pressed portion against which the electric wire bundle is pressed. Further, the inner portion is pushed into the exterior body through the slit while being deformed so as to be inverted when the electric wire bundle is pressed against the electric wire pressed portion, and is accommodated in the exterior body together with the electric wire bundle.

An insulated electric wire with a water-stopping portion has excellent water-stopping performance and forms quickly, and a wire harness includes the insulated electric wire. An insulated electric wire includes: a conductor wherein multiple metal material elemental wires are twisted together; and an insulation covering covers an outer circumference of the conductor. The insulated electric wire includes an exposed portion wherein the insulation covering is removed; a covered portion wherein the insulation covering covers the conductor, the exposed and covered portions are adjacent to each other in a longitudinal axis direction; and a water-stopping portion wherein gaps between the wires in the exposed portion are filled with a water-stopping agent. At least a portion of the water-stopping agent contacting the wires is made of a resin material that cures upon contact. A wire harness includes the insulated electric wire, and electric connections at both ends, each capable of other device connection.