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    • 1. 发明申请
    • GRAVITY BASE,JACK-UP PLATFORM METHOD AND APPARATUS
    • GRAVITY BASE,JACKUP UP PLATFORM METHOD AND APPARATUS
    • WO1981000423A1
    • 1981-02-19
    • PCT/US1980000986
    • 1980-08-04
    • OFFSHORE CO
    • OFFSHORE CORAY DHERRMANN RPEASE F
    • E02B17/00
    • E02B17/021E02B17/0872E02B2017/006E02B2017/0069E02B2017/0086
    • Offshore, gravity base, jack-up platform comprising a deck (22), a gravity base (24), and one or more legs (26) interconnecting the deck and base. The gravity base comprises a generally polygonal shaped, monolithic hull structure (28) with reaction members (30) extending downwardly from the hull to penetrate the waterbed and react to vertical and lateral loads imposed upon the platform while maintaining the gravity hull in a posture elevated above the surface of the waterbed. A method aspect of the invention includes the steps of towing a gravity base, jack-up platform, as a unit, to a preselected offshore site floating upon the gravity hull. During the towing operation, the deck is mounted adjacent the gravity base with leg or legs projecting through the deck. At a preselected offshore station ballast is added to the gravity base and the platform descends slightly to a posture where the platform is buoyantly supported by the deck. The base is then jacked down toward the seabed and the platform is laterally brought onto station. Ballast is then added to the deck and the reaction members are penetrated into the waterbed to operational soil refusal. Ballast is then ejected from the deck and the deck is jacked to an operational elevation above a predetermined statistical wave crest height.
    • 离岸,重力基座,自升式平台包括甲板(22),重力基座(24)以及连接甲板和底座的一个或多个腿部(26)。 重力底座包括大致多边形的整体式船体结构(28),其中反作用构件(30)从船体向下延伸以穿透水床并对施加在平台上的垂直和横向载荷作出反应,同时将重力船体保持在升高的姿势 在水面的上方。 本发明的方法方面包括将重力基座,自升式平台作为一个单元牵引到漂浮在重力船体上的预选离岸站点的步骤。 在牵引作业期间,甲板安装在重力基座附近,腿部或腿部穿过甲板突出。 在预选的海上工作站,重力基座上添加压载物,平台稍微下降到平台由甲板浮力支撑的姿势。 然后将基座朝向海底向下压,并将平台横向带到站台上。 然后将压载物加入到甲板中,并且反应构件被渗透到水床中以防止可操作的土壤被拒绝。 然后将压载物从甲板上弹出,甲板被提升到高于预定的统计波峰高度的操作高度。