Offshore platform deck removal method

    公开(公告)号:US12012707B2

    公开(公告)日:2024-06-18

    申请号:US17045111

    申请日:2019-04-02

    申请人: SAIPEM S.P.A.

    摘要: A method for lifting a payload of an offshore platform is provided. The offshore platform comprises a support structure supporting the payload. The payload includes a main deck and a column directly connected to the support structure, the column supporting the main deck. The method includes coupling a plurality of tension rods to a lower lifting device, having a welding surface weldable to a welding portion of the column and an upper lifting device having a coupling interface such that the plurality of tension rods connect the lower lifting device and the upper lifting device. The plurality of extendable tension rods can extend along a rod direction between the lower lifting device and the upper lifting device to separate the payload from the support structure. At least some of the tension rods of the plurality of tension rods are pre-tensioned to exert a compressive action to the payload.

    System for Offshore Production of Fuel
    2.
    发明公开

    公开(公告)号:US20230406458A1

    公开(公告)日:2023-12-21

    申请号:US18334964

    申请日:2023-06-14

    IPC分类号: B63B35/44 E02B17/00

    摘要: A method and system for the offshore production of fuel includes an offshore marine platform on which is mounted a hydrogen production unit. The hydrogen production unit may produce hydrogen utilizing raw materials sourced adjacent the marine platform, including seawater and electricity from offshore wind turbines. The produced hydrogen may then be blended onboard the marine platform with liquefied natural gas delivered to the marine platform in order to produce a blended fuel comprised of the delivered natural gas and a portion of the produced hydrogen. The blended fuel may be subsequently liquified and transported away from the marine platform, or conveyed to a remote location via a seabed pipeline, or combusted by onboard combustion turbines that can in turn drive electric generators onboard the marine platform to produce electricity.

    Method and apparatus for removing underwater platforms

    公开(公告)号:US09808873B2

    公开(公告)日:2017-11-07

    申请号:US14861148

    申请日:2015-09-22

    申请人: Jon Khachaturian

    发明人: Jon Khachaturian

    摘要: A method is provided for removing an abandoned marine platform from a seabed. The platform extends below the seabed mud line. In order to remove the platform, a frame is provided having a perimeter that surrounds an open center. The frame is lowered over the platform wherein the platform occupies the open center portion. A movable cutter cable is fitted to the frame. At least a part of the cutter cable is positioned below the mud line. The cutter is moved relative to the frame to cut the platform below the mud line. Such movement can be a back and forth movement wherein the cutter cable moves in a first direction, stops and then moves in a second direction that is generally opposite the first direction. A lifting device can employ two vessels and two frames, each frame bridging from one vessel to the other. Winches on the vessel can be used to provide movement to the cutter cable. These same winches can take up cable slack as cutting moves from one platform member (e.g. leg, jacket leg, piling, etc) to another.