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1. 发明授权

US06467557B1 Long reach rotary drilling assembly 有权
标题翻译：长距离旋转钻孔总成
公开(公告)号：US06467557B1
公开(公告)日：2002-10-22
申请号：US09629493
申请日：2000-07-31
申请人： R. Ernst Krueger , N. Bruce Moore , Ronald E. Beaufort , Duane T. Bloom
发明人： R. Ernst Krueger , N. Bruce Moore , Ronald E. Beaufort , Duane T. Bloom
IPC分类号： E21B47024
CPC分类号： E21B23/08 , E21B4/18 , E21B7/062 , E21B7/068 , E21B44/005 , E21B2023/008
摘要： A long reach rotary drilling assembly comprises an elongated conduit extending through a bore in an underground formation, a drill bit for being rotated to drill the bore, a 3-D steering tool on the conduit for steering the drill bit, and a tractor on the conduit for applying force to the drill bit. The steering tool includes a telemetry section, a rotary section, and a flex section assembled as an integrated system in series along the length of the tool. The flex section comprises a flexible drive shaft to which a bending force is applied when making inclination angle adjustments. The rotary section includes a deflection housing which rotates for making azimuth angle adjustments. The telemetry section receives inclination and azimuth angle steering commands together with actual inclination and azimuth angle feedback signals for controlling operation of the flex section and rotary section to steer the drilling assembly along a desired course. The tractor includes a gripper which can assume a first position that engages an inner surface of the bore and limits relative movement of the gripper relative to the inner surface. The gripper can also assume a second position that permits substantially free relative movement between the gripper and the inner surface of the bore. A propulsion assembly moves the tractor with respect to the gripper while the gripper portion is in the first position. The tractor applies force to the drill bit for drilling the bore along a desired course the direction of which is controlled by the 3-D steering tool.
摘要翻译：长距离旋转钻井组件包括延伸穿过地下地层中的孔的细长导管，用于旋转钻孔的钻头，用于转向钻头的导管上的3-D转向工具，以及在该钻头上的拖拉机用于向钻头施加力的导管。该转向工具包括一个遥测部分，一个旋转部分和一个沿工具长度串联组合成一个集成系统的弯曲部分。柔性部分包括柔性驱动轴，当进行倾斜角调整时，弯曲力被施加到该柔性驱动轴。旋转部分包括旋转以便进行方位角调整的偏转壳体。遥测部分接收倾斜和方位角转向指令以及实际倾角和方位角反馈信号，用于控制弯曲部分和旋转部分的操作，以沿着期望的过程转向钻探组件。拖拉机包括夹持器，其可以采取接合孔的内表面的第一位置并且限制夹持器相对于内表面的相对运动。夹具还可以呈现第二位置，其允许夹持器和孔的内表面之间的基本上自由的相对运动。当夹持器部分处于第一位置时，推进组件相对于夹具移动拖拉机。拖拉机对钻头施加力，以沿着其方向由3-D转向工具控制的期望过程钻孔。

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