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    • 10. 发明授权
    • Spray ice structure
    • 喷冰结构
    • US4699545A
    • 1987-10-13
    • US762342
    • 1985-08-05
    • Andrie C. T. ChenHans O. Jahns
    • Andrie C. T. ChenHans O. Jahns
    • E02B17/02E02D29/09E02D21/00E02B17/00
    • E02D29/06E02B17/028
    • The present invention provides an approach for drilling offshore arctic wells in areas covered by floating ice. A grounded spray ice drilling structure having an inner drilling platform portion and an outer barrier portion which are contiguous is constructed by withdrawing water from beneath the ice sheet and spraying the water through the air when the air is below the freezing temperature of the water. This causes the water to freeze into spray ice as it passes through the air. The resulting spray ice is deposited on the ice sheet to build up the grounded spray ice drilling structure. The outer barrier portion is built up to a greater freeboard than the inner drilling platform portion, and is adapted to laterally confine the inner drilling platform portion and to protect the inner drilling platform portion from natural ice forces.
    • 本发明提供了一种在浮冰覆盖区域内钻探海洋北极井的方法。 具有连续的内部钻井平台部分和外部阻挡部分的接地喷雾式钻井结构通过从冰盖下方抽出水而在空气低于水的冷冻温度时将水喷射通过空气构成。 这会导致水在通过空气时冻结成冰。 所得到的喷雾冰沉积在冰盖上以建立接地的喷射冰钻孔结构。 外部阻挡部分构建成比内部钻井平台部分更大的干舷,并且适于横向地限制内部钻井平台部分并且保护内部钻井平台部分免受自然冰力的影响。