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    • 4. 发明授权
    • Movement control system for wellbore apparatus and method of controlling
a wellbore tool
    • 井筒设备运动控制系统和井眼工具控制方法
    • US6070670A
    • 2000-06-06
    • US53588
    • 1998-04-01
    • Thurman B. CarterMichael LukeJohn D. Roberts
    • Thurman B. CarterMichael LukeJohn D. Roberts
    • E21B17/07E21B29/00
    • E21B17/07
    • A wellbore motion control apparatus for controlling the motion of a tubular wellbore string (in one aspect with an additional item and/or apparatus connected thereto) in a wellbore extending from a surface down into the earth has been invented which has, in one aspect, a central mandrel connected to the tubular wellbore string, a housing with a hollow interior and fluid therein, at least one fluid passage apparatus disposable in the hollow interior and having a fluid flow channel extending therethrough, and the at least one fluid passage apparatus secured to the central mandrel, the housing surrounding the central mandrel, the at least one fluid passage apparatus disposed for movement in a chamber defined by an inner surface of the housing and an outer surface of the central mandrel, the at least one fluid passage apparatus positioned within the chamber so that fluid therein is flowable therethrough permitting movement of the fluid passage apparatus within the chamber and thereby controlling movement of the mandrel and therefore of the tubular wellbore string in the wellbore. In one aspect, the apparatus has a first upper piston and a second lower piston, each movably disposed in the chamber, the first upper piston secured to the central mandrel so the central mandrel moves with the first upper piston, each piston having a fluid passage apparatus, the first upper piston movable about at least one rod connected to the second lower piston so that the first upper piston is movable downwardly on the at least one rod as fluid passes therethrough to move to abut the second lower piston. In one aspect the pistons move at different rates.
    • 已经发明了一种井筒运动控制装置,其用于在从一个表面向下延伸到地球中的井眼中控制管状井眼柱(在一个方面与其连接的附加物品和/或设备)的运动,其一方面, 连接到管状井眼柱的中心心轴,其中具有中空内部和流体的壳体,至少一个流体通道设备,其在中空内部中一次性地具有延伸穿过其中的流体流动通道,并且至少一个流体通道设备固定到 中心心轴,围绕中心心轴的壳体,设置用于在由壳体的内表面限定的腔室中以及中心心轴的外表面移动的至少一个流体通道设备,所述至少一个流体通道设备位于 所述室使得其中的流体可以流过,从而允许流体通道设备在腔室内移动,从而进行调节 心轴的所有运动以及因此在井眼中的管状井眼柱的运动。 在一个方面,该装置具有第一上活塞和第二下活塞,每个可活动地设置在腔室中,第一上活塞固定到中心心轴,使得中心心轴与第一上活塞一起移动,每个活塞具有流体通道 装置,所述第一上活塞围绕连接到所述第二下活塞的至少一个杆可移动,使得当流体通过所述第一上活塞时,所述第一上活塞在所述至少一个杆上向下移动以移动以抵靠所述第二下活塞。 在一个方面,活塞以不同的速率移动。