An underwater data center system with a data center is positioned in a water environment and powered by one or more sustainable energy sources. One or more processors are coupled to the data center or included in the data center. A controller is coupled to the one or more processors. A housing member houses the one or more processors under water. One or more cables are coupled to the one or more processors or the sustainable energy source. One or more fiber optical elements are at an interior of the one or more cables, and one or more sensors are at an exterior of the one or more cables.

The systems and methods described herein provide a submarine optical repeater in which a plurality of thermally conductive, electrically insulative, ceramic members form a hollow structure having an interior volume that is maintained at a relatively high first voltage when compared to a relatively low second voltage maintained external to the hollow structure. A conductive element at the first voltage disposed in the interior volume provides power to optical repeaters disposed on the interior surface of the hollow structure. Power flows radially outward from the conductive element to the optical repeaters to the surrounding environment about the submarine optical repeater. The thermally conductive ceramic members electrically isolate the optical repeaters from the second voltage while providing a thermally conductive pathway for the heat generated during the operation of the optical repeaters to dissipate into the surrounding environment.

A pressure housing assembly according to exemplary aspects includes: a saddle assembly configured to encase a midpoint access section of a cable; and a pressure housing configured to be mounted on the saddle assembly. The saddle assembly has a first cable SSTL tube opening where a first seal member is provided; and a second cable SSTL tube opening where a second seal member is provided. The pressure housing has a corresponding first cable SSTL tube opening where a third seal member is provided; a second cable SSTL tube opening where a fourth seal member is provided; and a port configured to allow at least one penetrator to be inserted therethrough. The saddle assembly comprises a seal block configured to at least partially surround the midpoint access section of the cable.

Method for installing an elongated element, in a submarine duct, the submarine duct having an entry port and an exit port located in outer liquid (OL) at a second depth, the method comprising the steps of: introducing the elongated element into the entry port, introducing propelling liquid (PL) into the entry port,
characterized in that the method comprises a step of sucking propelling liquid (PL) out of the exit port of the duct with an immerged suction pump being operated at a predetermined suction pressure drop (?P.sub.pump) of propelling liquid (PL) so that the predetermined suction pressure drop (?P.sub.pump) applied to propelling liquid (PL) is smaller than a hydrostatic pressure (P.sub.hydro) of the outer liquid (OL) at the second depth.

The present techniques are directed to systems and methods for forming a pipe-conforming structure. The pipe-conforming structure includes a polymer material and one or more optic fibers embedded within the polymer material. The polymer material is formed into a structure that is conformed to the shape of a pipe. A method includes forming a polymer material into a structure including an edge region and a center region. The center region has a greater thickness than the edge region. The method includes inserting one or more optic fibers into the polymer material.

A cartridge includes an outer case, partially filled with electrically insulating gel, and at least one electrically conductive track submerged in the insulating gel. Connection sets including at least one connector half and such a cartridge are also disclosed.

In at least some embodiments, a disclosed subsea cable includes one or more floodable optical fiber conduits each having at least one tight buffered optical fiber for transporting optical signals. Each tight buffered optical fiber may have a relatively limited length. The subsea cable may further include multiple strength members contra-helically wound around or together with the one or more floodable optical fiber conduits. There may also or alternatively be included at least one hermetically sealed optical fiber conduit having at least one protected optical fiber spliced to one of the tight buffered optical fibers. At least some implementations splice each of the tight buffered optical fibers to corresponding protected fibers for the long-haul communications. Flooding of the floodable conduits may be provided via connectors at the subsea cable ends, via breakout locations where sensors are attached, and/or via vents in the conduit wall. Some method embodiments deploy the disclosed subsea cable designs in a body of water, putting the interior of at least one floodable optical fiber conduit in fluid communication with the body of water while supporting extended use for communicating signals, particularly in deep water where temperatures are relatively low. Because the floodable conduits have pressure-equalized interiors they may be formed from plastic or other materials that ease the process of attaching sensors to the subsea cables.

A method and apparatus for providing a fiber element are disclosed. The method includes the steps of opening a first control valve element (355) at a proximate end region of a first lumen (310) that extends along a flexible pipe (100), opening a first vent valve element (400) at a remote end region of a second lumen (320) that extends along the flexible pipe (100), providing a new fiber element along the second lumen (320) via an opening (350) at a proximate end region of the second lumen (320) and closing the first vent valve element (382) and the first control valve element (355).

A subsea installation tool for installing a flexible body, e.g. a subsea fiber cable on a seabed from a surface vessel, and an associated method for installing the flexible body on the seabed is provided. The installation tool includes a tensioner that may be coupled to the flexible body to actively pull it down, thus increasing tension in an upper section of the cable from the installation vessel to the installation tool. High tension in the upper part of the cable gives good control even in strong sea currents. At the same time the tensioner enables lower tension in the bottom part cable from the installation tool to the seabed, giving good control of the touchdown position on the seabed.

Vented optical tube. At least some illustrative embodiments are conduits comprising a tube having a wall defining an interior volume of the tube. One or more optical fibers are disposed within the interior volume. The wall includes a plurality of vents passing from an outer surface of the wall to the interior volume, the plurality of vents disposed along a length of the tube, and wherein the vents are configured to convey a fluid in contact with the outer surface into the interior volume of the tube.