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    • 40. 发明授权
    • Apparatus and methods for drilling with casing
    • 用套管钻孔的装置和方法
    • US07090023B2
    • 2006-08-15
    • US11124755
    • 2005-05-09
    • David M. HaugenFrederick T. Tilton
    • David M. HaugenFrederick T. Tilton
    • E21B7/20
    • E21B7/20E21B4/02E21B2021/006
    • The present invention provides an apparatus and methods to reduce ECD and pressure associated therewith while drilling with casing. In one aspect, the invention provides an energy transfer assembly locatable at a predetermined location in a casing string. The assembly includes an impeller portion in the interior of the casing to be acted upon by the downward moving fluid in the casing and a pump portion disposed outwardly of the impeller portion and arranged in fluid communication with the upward moving fluid in the annulus between the casing and the borehole, adding energy thereto and reducing pressure in the annulus therebelow. In another aspect, the energy transfer assembly is retrievable to the surface of the wellbore prior to cementing. In a further aspect, fluid ports between the interior and exterior of the casing are remotely sealable prior to cementing.
    • 本发明提供一种在与套管钻孔时减少与其相关联的ECD和压力的装置和方法。 一方面,本发明提供一种可定位在套管柱中的预定位置处的能量传递组件。 该组件包括在壳体内部的叶轮部分,该叶轮部分由壳体中向下移动的流体作用,泵部分设置在叶轮部分的外侧,并且布置成与壳体中的环形空间中的向上移动的流体流体连通 和钻孔,向其中增加能量并减少其中的环带中的压力。 在另一方面,能量传递组件在固井之前可回收到井眼的表面。 在另一方面,壳体的内部和外部之间的流体端口在固井之前可远程密封。