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    • 2. 发明授权
    • Coupling for dual member pipe
    • 双管道联轴器
    • US07216724B2
    • 2007-05-15
    • US10878482
    • 2004-06-28
    • Kelvin P. SelfFloyd R. GunsaulisDavid R. Payne
    • Kelvin P. SelfFloyd R. GunsaulisDavid R. Payne
    • E21B4/06
    • E21B19/08E21B7/046E21B17/03E21B17/07
    • A coupling assembly to interconnect an inner member and an outer member of a dual member drill string in torque transmitting engagement is disclosed. The coupling assembly is adapted to transmit torque input from both members to a downhole tool. In one embodiment, the coupling assembly comprises a connector sub that fixedly and non-fixedly couples both members. In another embodiment, the coupling assembly comprises a clutch mechanism to interconnect both members when the rotational speed of the outer member exceeds the rotational speed of the inner member. In another embodiment, the coupling assembly comprises a mechanism to couple both members by axial downhole movement of the inner member relative to the outer member. In another embodiment, the coupling assembly comprises a planetary gear system that interconnects both members to provide high torque to the downhole tool at relatively low output speed of the dual member drill string.
    • 公开了一种联接组件,用于将扭转传递接合的双组件钻柱的内部构件和外部构件互连。 联接组件适于将来自两个构件的扭矩输入传递到井下工具。 在一个实施例中,联接组件包括固定地和非固定地连接两个构件的连接器副。 在另一个实施例中,联接组件包括当外部构件的旋转速度超过内部构件的转速时将两个构件互连的离合器机构。 在另一个实施例中,联接组件包括通过内部构件相对于外部构件的轴向井下移动来联接两个构件的机构。 在另一个实施例中,联接组件包括行星齿轮系统,该行星齿轮系统将两个构件互连,以在双组件钻柱的相对低的输出速度下向井下工具提供高扭矩。