A utility box assembly includes a housing structure having an open upper end, a first peripheral channel around the open upper end, and a second peripheral channel disposed below the first peripheral channel and inwardly therefrom. A first sealing element is seated in the first peripheral channel, and a second sealing element is seated in the second peripheral channel. A cover is configured to cover the open upper end. The cover has an outer peripheral portion configured to engage the first sealing element, and a downward-depending flange configured to engage the second sealing element. A liquid-tight seal is provided by the compression of the first and second sealing elements within their channels when the cover is secured to the open upper end of the housing.

A utility box assembly includes a housing structure having an open upper end, a first peripheral channel around the open upper end, and a second peripheral channel disposed below the first peripheral channel and inwardly therefrom. A first sealing element is seated in the first peripheral channel, and a second sealing element is seated in the second peripheral channel. A cover is configured to cover the open upper end. The cover has an outer peripheral portion configured to engage the first sealing element, and a downward-depending flange configured to engage the second sealing element. A liquid-tight seal is provided by the compression of the first and second sealing elements within their channels when the cover is secured to the open upper end of the housing.

A power switching module including: a plurality of input interfaces; a plurality of output interfaces; a plurality of switches connected between respective ones of the input interfaces and the output interfaces; and a controller operable to selectively open and close the switches, wherein the power switching module is received in a marinised canister.

A power switching module including: a plurality of input interfaces; a plurality of output interfaces; a plurality of switches connected between respective ones of the input interfaces and the output interfaces; and a controller operable to selectively open and close the switches, wherein the power switching module is received in a marinised canister.

A measurement apparatus is disclosed for connection to an end of a cable (1) having at least one of: at least one electrically conductive core (11) for carrying electrical current and/or electrical signals along the cable; at least one electromagnetic waveguide (12) for carrying electromagnetic signals along the cable; and at least one bore (13) for conveying a fluid along the cable. The measurement apparatus comprises: connection means (4) for connecting to the end in an above-water or out-of-water environment to make at least one of: at least one respective electrical connection (41) to at least one core, at least one respective waveguide connection (42) to at least one waveguide for sending an electromagnetic signal along the waveguide, and at least one respective fluid or hydraulic connection (43) to at least one bore; and measuring means (5) connected to the connection means and operable to perform at least one measurement, via the connection means, on a connected cable. The measurement apparatus is deployable, when connected to an end of the cable, with the cable end to an underwater location for a period of time, and recoverable with the connected cable end after the period of time to an above-water or out-of-water location. The measuring means is operable to perform the measurement(s) while the measurement apparatus is connected to the cable end and at least while submerged with the connected cable end and/or after recovery with the connected cable end from the underwater location to the above-water or out-of-water location.

A measurement apparatus is disclosed for connection to an end of a cable (1) having at least one of: at least one electrically conductive core (11) for carrying electrical current and/or electrical signals along the cable; at least one electromagnetic waveguide (12) for carrying electromagnetic signals along the cable; and at least one bore (13) for conveying a fluid along the cable. The measurement apparatus comprises: connection means (4) for connecting to the end in an above-water or out-of-water environment to make at least one of: at least one respective electrical connection (41) to at least one core, at least one respective waveguide connection (42) to at least one waveguide for sending an electromagnetic signal along the waveguide, and at least one respective fluid or hydraulic connection (43) to at least one bore; and measuring means (5) connected to the connection means and operable to perform at least one measurement, via the connection means, on a connected cable. The measurement apparatus is deployable, when connected to an end of the cable, with the cable end to an underwater location for a period of time, and recoverable with the connected cable end after the period of time to an above-water or out-of-water location. The measuring means is operable to perform the measurement(s) while the measurement apparatus is connected to the cable end and at least while submerged with the connected cable end and/or after recovery with the connected cable end from the underwater location to the above-water or out-of-water location.

A downhole cable that has a cable core with an inner jacket located about it. The inner jacket has a shell located thereabout, and a pair of strength member layers surrounds the inner shell. Interstitial spaces of the strength member layers are filled with bonding layers. One of the strength member layers is at a contra-helical lay angle to the other. An outer jacket is located about one of the strength member layers, and the outer jacket is bonded with the bonding layers.

A downhole cable that has a cable core with an inner jacket located about it. The inner jacket has a shell located thereabout, and a pair of strength member layers surrounds the inner shell. Interstitial spaces of the strength member layers are filled with bonding layers. One of the strength member layers is at a contra-helical lay angle to the other. An outer jacket is located about one of the strength member layers, and the outer jacket is bonded with the bonding layers.

A cable arrangement for feeding power and signals to downhole equipment, such as an electrically submersible pump (6), within an oil or gas well, comprising an upper suspension element (15), a lower connector (22), a docking station (11) for the downhole equipment coupled to said connector (22), and a cable (8a), comprising lines for power and signal. The cable extends between, and is coupled to, the upper suspension element (15) and the lower connector (22). The docking station (11) is adapted for attachment to the inner surface of a production tubing (5), that a narrow gap is formed between the production tubing (5) and the downhole equipment (6). The cable (8) is shaped to fit inside the gap by having a first dimension in the radial direction of the gap, which is smaller than the gap and a second dimension in the tangential direction of the gap, which is substantially larger than the first dimension.

A power strip for covering cables, cords and wires includes a row of segment covers together containing channels with channels for the cables. The opposite ends of adjacent covers are hingedly connected. A coupling is swivelably connected between each set of adjacent ends of the covers. Coupling channels in each coupling complete the cover channels. A diversion tunnel from a coupling channel and out the lateral side of the power strip for diversion of cables out of the power strip.