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    • 6. 发明申请
    • OUTER CASING STRING AND METHOD OF INSTALLING SAME
    • 外套箱和安装方法
    • WO2012012024A2
    • 2012-01-26
    • PCT/US2011037716
    • 2011-05-24
    • CAMERON INT CORPROBOTTOM GAVIN PAULTHORNBURROW EDWARD THOGG NIGEL
    • ROBOTTOM GAVIN PAULTHORNBURROW EDWARD THOGG NIGEL
    • E21B17/00E21B19/00
    • E21B43/10E21B17/08E21B33/04
    • An outer casing string, including a surface casing head, and associated installation method. In some embodiments, the surface casing head includes an outer tubular member insertable through a diverter of an installed conductor system, an inner tubular member at least partially disposed within and moveable relative to the outer tubular member, and a sleeve ring rotatably coupled to the inner tubular. The outer tubular member has an annular recess. The sleeve ring includes a snap ring that is displaceable between an extended position and a retracted position. In the extended position, at least a portion of the snap ring is received within the annular recess, and the outer tubular member is axially immovable relative to the inner tubular member. In the retracted position, no portion of the snap ring is received within the annular recess, and the outer tubular member is axially moveable relative to the inner tubular member.
    • 外套管柱,包括表面套管头,以及相关的安装方法。 在一些实施例中,表面壳体头部包括可通过安装的导体系统的转向器插入的外部管状构件,至少部分地设置在外部管状构件内且可相对于外部管状构件移动的内部管状构件,以及可旋转地联接到内部管状构件的内部 管状。 外部管状构件具有环形凹部。 套环包括可在伸出位置和缩回位置之间移位的卡环。 在延伸位置中,卡环的至少一部分容纳在环形凹部内,并且外部管状构件相对于内部管状构件轴向不可移动。 在缩回位置,卡环的任何部分都不容纳在环形凹部内,并且外部管状构件相对于内部管状构件可轴向移动。