Pipeline segments can contain cables, such as communication cables (e.g., fiber optic cables) within insulation material surrounding the pipeline segments. Cables can be embedded within the insulation material, run through conduits embedded within the insulation material, placed in channels formed in the insulation material, or otherwise. Channels containing one or more cables can be filled with supplemental insulation material, thus securing the cables within the channels. Pipelines created as disclosed herein can enable data transfer between distant points without the need to lay fiber optic cable in addition to the pipeline. Further, fiber optic cable embedded thusly can be used to sense conditions in the pipeline, such as leaks, seismic activity, strain, and temperature information.

Clamp and Bending Strain Relief (BSR) system and method are disclosed. One example of a system can include a clamp coupled to a cable. The clamp is configured to couple an apparatus to the cable while allowing the cable to pass continuously through the clamp. A BSR apparatus is coupled to the clamp and the cable by a housing.

A connector part of a connector unit having a connecting structure and a guiding assembly, wherein the connecting structure is moveable between at least two positions at least one of the at least two positions being a connection position and wherein the guiding assembly determines a movement of the connecting structure in the connection position. The guiding assembly has a first keyway, at least a second keyway and at least one key being engaged in the first keyway and the at least second keyway to bring the connecting structure in the connection position due to a movement of the key in the first keyway and the at least second keyway.

Underwater connecting apparatuses include a flexible diaphragm that at least in part defines a wall of a chamber configured to contain a fill material, the wall having a perimeter with a non-circular profile when the chamber is viewed in cross-section. The non-circular profile of the perimeter is configured to allow a volume of the chamber to change without substantially changing a length of the perimeter.

A power cable and filler device adapted to bear against a first and second power cores in a power cable, including a first arced wall which defines a portion of a first circle having a first diameter, a second and third arced wall, each defining a portion of a second circle having a second diameter which is smaller than the first diameter. A chamber is formed between the first, second and third arced walls.

Embodiments of the present application provide a submarine optical cable system for reducing the complexity of the submarine optical cable system. The submarine optical cable system comprises a first trunk station, a second trunk station, a branch station, first XC equipment, second OXC equipment, a trunk fiber set and a branch fiber. The trunk fiber set at least comprises a first trunk fiber and a second trunk fiber. The branch station is connected with the second trunk fiber arranged between the first OXC equipment and the second OXC equipment through the branch fiber. The first trunk station is configured for sending a first service through a first transmission channel in a first transmission channel set and sending a second service through a second transmission channel in a second transmission channel set. The first OXC equipment is configured for transferring the first transmission channel to the second trunk fiber. The branch station is configured for uploading or downloading the first service and the second service through the second trunk fiber. The second OXC equipment is configured for transferring the transferred first transmission channel to the first trunk fiber.

The present invention provides systems, methods, and apparatuses for subsea optical to electrical distribution. The present invention comprises one or more routing units adapted to convert optical signals to electrical signals and route the converted electrical signals to an appropriate end device. The routing unit is a compact device that may be installed without the use of heavy equipment.

[Problem] To suppress the number of man-hours required to handle design changes accompanying a change in heat generation in an internal unit stored inside an electric device.

[Solution] The present invention includes: at least one internal unit, which is a heat generating body and has a prescribed cross-sectional external shape; at least one heat conduction unit, which is a good conductor of heat and has a prescribed cross-sectional external shape; and a device housing in which two or more of the internal unit and the heat conduction unit can be stored in a state of being adjacent to each other with the prescribed cross-sectional external shapes thereof overlapping each other, the device housing thermally connecting to the stored internal unit or the stored heat conduction unit.

An improved deepwater optical fiber cable with abrasion protection and techniques for manufacturing the same are provided. For example, the abrasion protected deepwater cable may be a modification or enhancement of an existing special application (SPA) optical fiber cable. One or more additional layers of metallic tape and jackets may be added to the outermost layer of the SPA cable. The tape and jacket layers may have different thicknesses and may be made from different materials to optimize protection against man-made objects or otherwise naturally occurring materials in deep water environments, such as fish aggregation devices (FADs).

Disclosed is an optical cable for distributed sensing. The optical cable comprises a first metal tube with at least two optical fibers loosely arranged therein and a second metal tube with at least two tight buffered optical fibers tightly arranged within an inner surface of the second metal tube. A third metal tube having an inner surface collectively surrounds and operatively contacts the first metal tube and said second metal tube. At least one of the first metal tube and the second metal tube is fixed by means of an adhesive compound to the inner surface of the third metal tube.