A cable includes at least one inner conductor and an insulation layer surrounding the inner conductor. An outer conductive layer surrounds the insulation layer and center conductor and includes a carbon nanotube substrate having opposing face surfaces and edges. One or more metals are applied as layer(s) to the opposing face surfaces and edges of the carbon nanotube substrate for forming a metallized carbon nanotube substrate. The metallized carbon nanotube substrate is wrapped to surround the insulation layer and center conductor for forming the outer conductive layer. Embodiments of the invention include a braid layer positioned over the outer conductive layer. The braid layer is woven from of plurality of carbon nanotube yarn elements made of a plurality of carbon nanotube filaments. The carbon nanotube filaments include a carbon nanotube core and metal applied as a layer on the carbon nanotube core for forming a metallized carbon nanotube filaments and yarns woven to form the braid layer.

A method for the continuous production of coaxial cables (224) having a thin-walled, radially closed outer conductor of nonferrous metal comprises supplying a flat strip of the nonferrous metal to a shaping apparatus (212), wherein the thickness of the strip corresponds to the wall thickness of the coaxial cable. The shaping apparatus is configured to continuously shape the supplied flat strip into a form corresponding to the outer conductor of the coaxial cable and around a cable core supplied before the outer conductor is closed. After the shaping, two opposite edges of the flat strip lie flush against one another in a contact region and are continuously welded to one another by a welding apparatus (216) by means of a laser, which radiates light having a wavelength smaller than 600 nm. The laser heats a point in a welding region that has a diameter smaller than 20% of the cross-sectional dimension of the coaxial cable. The welded coaxial cable is drawn off from the welding region and, after introducing a parallel or helical corrugation, is received in a receiving device (226).

A wireline system includes a control system, a downhole tool, and a wireline cable coupling the downhole tool and the control system. The wireline cable includes a plurality of conductors, which includes a core conductor and a concentric conductor disposed around the core conductor, wherein two of the plurality of conductors form a conductor pair, and wherein each of the plurality of conductors is configured to transmit power, data, or both, between the control system and the downhole tool. The wireline cable further includes one or more insulative layers, wherein at least one insulative layer is disposed between any two conductors.

A wireline system includes a control system, a downhole tool, and a wireline cable coupling the downhole tool and the control system. The wireline cable includes a plurality of conductors, which includes a core conductor and a concentric conductor disposed around the core conductor, wherein two of the plurality of conductors form a conductor pair, and wherein each of the plurality of conductors is configured to transmit power, data, or both, between the control system and the downhole tool. The wireline cable further includes one or more insulative layers, wherein at least one insulative layer is disposed between any two conductors.

A data cable contains a cable core having a plurality of core pairs. Each of the core pairs are composed of two cores directly surrounded by a pair shielding. The pair shielding has a conductive exterior surrounding a core pair and being oriented outward. An overall shield surrounds the cable core and lies on the conductive exterior of the pair shielding and is thereby electrically connected to the cable core.

A high power opto-electrical cable with multiple power and telemetry paths and a method for manufacturing the same includes at least one cable core element and at least one high-power conductor core element incased in a polymer material jacket layer. The cable core element has at least one longitudinally extending optical fiber surrounded by a pair of longitudinally extending arcuate metallic wall sections forming a tube and a polymer material jacket layer surrounding and incasing the wall sections, wherein the optical fiber transmits data and the wall sections transmit at least one of electrical power and data.

A cable (210) includes a center conductor (220). An insulating material in the form of a layer (225) surrounds the center conductor. A sparse shield (232) partially surrounds the insulating material. The sparse shield may include a plurality of conductors, which are grouped adjacent to one another within a space around the insulating layer that has a length that is less than 25% of the total circumference of the insulating layer. An insulating jacket (227) covers the sparse shield and the remainder of the cable. The cable may be used in a cable assembly (10).

A low noise cable core and a manufacturing method thereof and a low noise cable using the same include an insulated conductor, a first type conductive layer, and a second type conductive layer. The insulated conductor includes a conductive core and an insulation layer encapsulating the conductive core. The first type conductive layer encapsulates the insulated conductor, and the second type conductive layer encapsulates the first type conductive layer. The first type conductive layer and the second type conductive layer are respectively formed by way of a first forming method and a second forming method different from the first forming method.

A method in the manufacturing of an insulated electric high voltage DC termination or joint includes the steps of providing an insulated electric high voltage DC cable including an inner conductor; a polymer based insulation system, the polymer based insulation system comprising an insulation layer and a semiconducting layer; and an outer grounding layer; removing the grounding layer and the semiconducting layer in at least one end portion of the high voltage DC cable, thereby exposing the insulation layer in the at least one end portion of the high voltage DC cable; covering the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable by a cover impermeable to at least one substance present in the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable in a non-homogenous distribution; subjecting the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable for a heat treatment procedure, while being covered by the cover, thereby equalizing the concentration of the at least one substance in the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable; and removing the cover. Instead of using a temporary cover, which is later removed, as the impermeable barrier, a field grading adapter or joint body mounted at the end of the DC cable during the manufacturing of the high voltage DC termination or joint may be used.

A method in the manufacturing of an insulated electric high voltage DC termination or joint includes providing an insulated electric high voltage DC cable including a high voltage DC conductor, a polymer based insulation system surrounding the high voltage DC conductor, the polymer based insulation system including an insulation layer and a semiconducting layer surrounding the insulation layer, and a grounding layer surrounding the semiconducting layer, removing the grounding layer and the semiconducting layer in at least one end portion of the high voltage DC cable, thereby exposing the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable, mounting a field grading adapter or joint body in the at least one end portion of the high voltage DC cable, thereby covering the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable, the field grading adapter or joint body being part of the high voltage DC termination or joint, wherein at least one substance is present in the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable in a non-homogenous distribution; and subjecting the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable for a heat treatment procedure, while being covered by the mounted field grading adapter or joint body, thereby equalizing the concentration of the at least one substance in the insulation layer of the polymer based insulation system in the at least one end portion of the high voltage DC cable.