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    • 9. 发明授权
    • Tubular cutting with debris filtration
    • 管状切片与碎片过滤
    • US08881818B2
    • 2014-11-11
    • US13108107
    • 2011-05-16
    • Stephen L. CrowMarcelle H. HedrickErik V. NordenstamChristopher W. Guidry
    • Stephen L. CrowMarcelle H. HedrickErik V. NordenstamChristopher W. Guidry
    • E21B29/00E21B23/01E21B27/00
    • E21B29/005E21B23/01E21B27/00
    • A cut and pull spear is configured to obtain multiple grips in a tubular to be cut under tension. The slips are set mechanically with the aid of drag blocks to hold a portion of the assembly while a mandrel is manipulated. An annular seal is set in conjunction with the slips to provide well control during the cut. An internal bypass around the seal can be in the open position to allow circulation during the cut. The bypass can be closed to control a well kick with mechanical manipulation as the seal remains set. If the tubular will not release after an initial cut, the spear can be triggered to release and be reset at another location. The mandrel is open to circulation while the slips and seal are set and the cut is being made. Cuttings are filtered before entering the bypass to keep the cuttings out of the blowout preventers.
    • 切割和拉伸矛构造成在张力下获得要切割的管状体中的多个夹具。 在操纵心轴的同时借助于阻力块机械地设置滑块以保持组件的一部分。 环形密封件与滑块一起设置,以在切割期间提供良好的控制。 围绕密封件的内部旁路可以处于打开位置,以允许在切割期间循环。 当密封保持固定时,旁路可以通过机械操作来关闭以控制井膛。 如果管道在初始切割后不会释放,则可以触发释放矛并在另一个位置重置矛。 心轴打开循环,同时将滑块和密封件放置并切割。 在进入旁路之前,将切屑过滤,以将切屑从防喷器中排出。