The invention concerns a subsea umbilical comprising an electrical conductor (2) and/or a fluid pipe, and an outer sheath (7) surrounding the electrical conductor (2) and/or the fluid pipe. The umbilical (1, 20, 21, 25, 30, 40, 51, 60) further comprising a plurality of deformable rods (3a, 3b, 15, 23a, 23b, 26a, 27a, 26b) evenly distributed between the electrical conductor (2) and/or the fluid pipe, and the outer sheath (7) for radial load protection of said electrical conductor (2) or fluid pipe.

The invention concerns a subsea umbilical comprising an electrical conductor (2) and/or a fluid pipe, and an outer sheath (7) surrounding the electrical conductor (2) and/or the fluid pipe. The umbilical (1, 20, 21, 25, 30, 40, 51, 60) further comprising a plurality of deformable rods (3a, 3b, 15, 23a, 23b, 26a, 27a, 26b) evenly distributed between the electrical conductor (2) and/or the fluid pipe, and the outer sheath (7) for radial load protection of said electrical conductor (2) or fluid pipe.

A submarine cable, that includes: an internal tubular sheath defining an inner space, the external tubular sheath insulating the inner space from the outside of the submarine cable, and at least one optical fiber.

The submarine cable further includes: an internal metallic tube placed in the inner space, the at least one optical fiber being placed in the internal tube, an electrical insulation arrangement placed in the inner space, externally around and apart from the internal metallic tube, and at least a tensile reinforcement layer formed of conductive tensile reinforcement strands made of aluminium or of aluminium alloy placed between the electrical insulation arrangement and the internal metallic tube.

A submarine cable, that includes: an internal tubular sheath defining an inner space, the external tubular sheath insulating the inner space from the outside of the submarine cable, and at least one optical fiber.

The submarine cable further includes: an internal metallic tube placed in the inner space, the at least one optical fiber being placed in the internal tube, an electrical insulation arrangement placed in the inner space, externally around and apart from the internal metallic tube, and at least a tensile reinforcement layer formed of conductive tensile reinforcement strands made of aluminium or of aluminium alloy placed between the electrical insulation arrangement and the internal metallic tube.

Provided is a power cable, and more particularly, to an ultra-high-voltage underground or submarine cable. In detail, the present invention relates to a power cable which is capable of effectively preventing a decrease in dielectric strength due to penetration of copper powder from a copper conductor into an insulating layer, thereby increasing the lifespan thereof, is capable of preventing damage to insulating paper, semiconductor paper, etc. even when repeatedly bent and unfolded, thereby maintaining an interlayer structure formed by winding the insulating paper, the semiconductor paper, etc., and is capable of improving bendability, flexibility, installability, workability, etc.

A power cable (1) for an electric submersible pump (ESP) system, and systems and methods thereof are described herein. The power cable (12) is a weight-bearing three-phase power cable comprising a core (8) having an outer diameter and comprising three insulated conductors (2) substantially embedded in a polymeric bedding (3); and a multi-layered armor comprising an inner steel-based continuous tube (4) surrounding and in direct contact with the core (8), and an outer steel-based continuous tube (5) surrounding and in direct contact with the inner steel-based continuous tube (4). The inner steel-based continuous tube (4) and the outer steel-based continuous tube (5) are mechanical congruent with each other as a result of a roll reducing technique.

A power cable (1) for an electric submersible pump (ESP) system, and systems and methods thereof are described herein. The power cable (12) is a weight-bearing three-phase power cable comprising a core (8) having an outer diameter and comprising three insulated conductors (2) substantially embedded in a polymeric bedding (3); and a multi-layered armor comprising an inner steel-based continuous tube (4) surrounding and in direct contact with the core (8), and an outer steel-based continuous tube (5) surrounding and in direct contact with the inner steel-based continuous tube (4). The inner steel-based continuous tube (4) and the outer steel-based continuous tube (5) are mechanical congruent with each other as a result of a roll reducing technique.

A thermal-insulated multi-walled pipe for superconducting power transmission comprises: a superconducting cable; a multi-walled pipe composed of a plurality of straight pipes and houses the superconducting cable; and a plurality of spacers that are located between adjacent two straight pipes of the plurality of straight pipes, wherein a cross-sectional shape of each spacer is a polygon having three or more vertices, each spacer has a through-hole at a center in the plane, an inner straight pipe is located to pass through the through-hole, a frictional coefficient μ.sub.i between each spacer and the inner straight pipe is 0.1 or less, a frictional coefficient μ.sub.o between each spacer and an outer straight pipe is 0.1 or less, and a ratio L.sub.d/d of a diagonal equivalent length L.sub.d of the polygon to an inner diameter d of the outer straight pipe of the adjacent two straight pipes is 0.9 or less.

Aggregated, submarine cable system information is securely stored, accessed and managed. Security is assured through the use of multi-factor authentication that is compliant with National Institutes of Standards And Technology and US. Government Defense Federal Acquisition Regulation requirements. Further, real-time audit logs are generated as end-users access controlled unclassified information.

Aggregated, submarine cable system information is securely stored, accessed and managed. Security is assured through the use of multi-factor authentication that is compliant with National Institutes of Standards And Technology and US. Government Defense Federal Acquisition Regulation requirements. Further, real-time audit logs are generated as end-users access controlled unclassified information.