In 2003 we were approached by one of our regular clients in connection with a novel way of building offshore oil jackets in the Caspian Sea. The jacket would be built on land and then tower out on a barge to the approximate location it was required and launched into the sea. As the structure of the jacket is tubular steel, the ends of all these tubes could be sealed off to make the whole assembly buoyant, and then by releasing air and replacing it with water in a controlled sequence, it would be possible to turn the jacket upright and sink it in the correct place on the seabed. This Upending Control Centre was the first of three similar systems supplied, the UCC hits the water first when the jacket is launched from the barge and stays submerged until a diver can gain access to operate the valves. The structure of the UCC is therefore designed to withstand the slam-loading and the inside is designed to enable a diver to work at varying angles as the whole assembly is gradually righted & trimmed to the true vertical position before being lowered to the seabed. The third such system has recently been supplied for launching jackets in Australian waters. The UCC is a reusable facility which can be fitted onto subsequent jackets for their launch, thus proving to be an economical method of providing substantial steel structures in deep water.

    • James Fisher Defence
    • Active Power
    • Special Container Solutions Ltd.
    • Vikoma
    • James Fisher Defence
    • Active Power
    • Special Container Solutions Ltd.
    • Vikoma

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