公开(公告)号：WO2009151786A2

公开(公告)日：2009-12-17

申请号：PCT/US2009/040983

申请日：2009-04-17

Applicant: DRECO ENERGY SERVICES LTD. ,  PRILL, Jonathan, Ryan ,  MARCHAND, Nicholas, Ryan ,  JOHNS, Ralph, William, Graeme ,  MOSCICKI, Matthew, R.

Inventor： PRILL, Jonathan, Ryan ,  MARCHAND, Nicholas, Ryan ,  JOHNS, Ralph, William, Graeme

CPC classification number: E21B4/02 ,  E21B3/00 ,  E21B7/06 ,  E21B21/08 ,  E21B21/10 ,  E21B44/005

Abstract: A downhole rotational rate control apparatus, adapted for coupling to the lower end of a drill string, includes a progressive cavity (PC) motor, a driveshaft, a mud flow control valve, and an electronics section. Drilling mud flowing downward through the drill string is partially diverted to flow upward through the PC motor and out into the wellbore annulus, with the mud flow rate and, in turn, the PC motor speed being controlled by the mud flow control valve. The control valve is actuated by a control motor in response to inputs from a sensor assembly in the electronics section. The PC motor drives the driveshaft and a controlled downhole device at a specific zero or non-zero rotational rate. By varying the rotational rate of the PC motor relative to the rotational rate of the drill string, the tool face orientation or non-zero rotational speed of the controlled device in either direction can be varied in a controlled manner.

Abstract translation: 一种适于联接到钻柱的下端的井下转速控制装置，包括渐进腔（PC）马达，驱动轴，泥浆流量控制阀和电子部分。 通过钻柱向下流动的钻井泥浆被部分地转向以通过PC马达向上流动，并通过泥浆流速进入井筒环，并且PC泥浆流速由泥浆流量控制阀控制。 响应于来自电子部件中的传感器组件的输入，控制电动机由控制电动机致动。 PC电机以特定的零或非零转速驱动驱动轴和受控的井下装置。 通过改变PC马达相对于钻柱的旋转速度的旋转速度，可以以受控的方式改变受控装置在任一方向上的工具面取向或非零转速。

公开(公告)号：WO2009151786A3

公开(公告)日：2010-03-04

申请号：PCT/US2009040983

申请日：2009-04-17

Applicant: DRECO ENERGY SERVICES LTD ,  PRILL JONATHAN RYAN ,  MARCHAND NICHOLAS RYAN ,  JOHNS RALPH WILLIAM GRAEME ,  MOSCICKI MATTHEW R

Inventor： PRILL JONATHAN RYAN ,  MARCHAND NICHOLAS RYAN ,  JOHNS RALPH WILLIAM GRAEME

IPC: E21B44/00 ,  E21B44/02

CPC classification number: E21B4/02 ,  E21B3/00 ,  E21B7/06 ,  E21B21/08 ,  E21B21/10 ,  E21B44/005

Abstract: A downhole rotational rate control apparatus, adapted for coupling to the lower end of a drill string, includes a progressive cavity (PC) motor, a driveshaft, a mud flow control valve, and an electronics section. Drilling mud flowing downward through the drill string is partially diverted to flow upward through the PC motor and out into the wellbore annulus, with the mud flow rate and, in turn, the PC motor speed being controlled by the mud flow control valve. The control valve is actuated by a control motor in response to inputs from a sensor assembly in the electronics section. The PC motor drives the driveshaft and a controlled downhole device at a specific zero or non-zero rotational rate. By varying the rotational rate of the PC motor relative to the rotational rate of the drill string, the tool face orientation or non-zero rotational speed of the controlled device in either direction can be varied in a controlled manner.

Abstract translation: 一种适于联接到钻柱的下端的井下转速控制装置，包括渐进腔（PC）马达，驱动轴，泥浆流量控制阀和电子部分。 通过钻柱向下流动的钻井泥浆被部分地转向以通过PC马达向上流动，并通过泥浆流速进入井筒环，并且PC泥浆流速由泥浆流量控制阀控制。 响应于来自电子部件中的传感器组件的输入，控制电动机由控制电动机致动。 PC电机以特定的零或非零转速驱动驱动轴和受控的井下装置。 通过改变PC马达相对于钻柱的旋转速度的旋转速度，可以以受控的方式改变受控装置在任一方向上的工具面取向或非零转速。