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    • 4. 发明授权
    • Fluid circulation apparatus
    • 流体循环装置
    • US5465787A
    • 1995-11-14
    • US282795
    • 1994-07-29
    • Brian A. Roth
    • Brian A. Roth
    • E21B21/10E21B34/10E21B4/04
    • E21B34/10E21B21/103
    • A fluid circulation apparatus for interconnection with a wellbore tubing string for particular use in drilling deviated wellbores, such as with coiled tubing. The circulation apparatus has a tubular body member with a longitudinal bore extending therethrough and threads for interconnection with a tubing string. A fluid communication port extends through a sidewall of the tubular body member, and a valve is placed thereacross for selectively permitting and preventing fluid flow through the fluid communication port. The valve is biased in a normally closed position by way of a spring. Fluid control means, such as a hydraulic fluid source conveyed through the tubing string, operates the valve in response to electrical signals sent to the fluid control means from the earth's surface.
    • 用于与钻井管柱相互连接的流体循环装置,特别用于钻井偏转井筒,例如用螺旋管。 循环装置具有管状本体构件,其具有延伸穿过其的纵向孔和用于与油管柱相互连接的螺纹。 流体连通端口延伸穿过管状本体构件的侧壁,并且阀被放置在其上以选择性地允许和防止流体流过流体连通口。 阀通过弹簧偏置在常闭位置。 诸如通过油管柱传送的液压流体源的流体控制装置响应于从地球表面发送到流体控制装置的电信号来操作阀。