公开(公告)号：EP2183465B1

公开(公告)日：2011-08-31

申请号：EP08828441.9

申请日：2008-07-21

申请人： Schlumberger Technology B.V. ,  PRAD Research And Development Limited ,  Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited

发明人： DOWNTON, Geoff ,  HORNBLOWER, Peter ,  BAYLISS, Martin ,  RICHARDS, Edward

IPC分类号： E21B47/024

CPC分类号： E21B47/024 ,  E21B7/067

摘要： Exhaust pressure from at least one actuator (34,36) which can tilt joint (6) of a bottom hole assembly (4) can be utilized to determine the direction (26) tiltable joint (6) is pointing (e.g., orientation, angular displacement, and/or inclination and azimuth). In one embodiment, a known exhaust pressure can be correlated to a known orientation and/or angular displacement, and the measured exhaust pressure can be compared to the known exhaust pressure to determine the orientation and/or angular displacement. In another embodiment, the flow rate of fluid exhausted from an actuator (34,36) can be derived from the exhaust pressure. The exhaust flow rate can then be used to calculate the state of actuation, which can allow determination of the angular displacement of the tiltable joint (6). Orientation and/or angular displacement with respect to the bottom hole assembly (4) can be resolved into an inclination and azimuth with respect to a formation (14).

公开(公告)号：EP2183465A2

公开(公告)日：2010-05-12

申请号：EP08828441.9

申请日：2008-07-21

申请人： Schlumberger Technology B.V. ,  PRAD Research And Development Limited ,  Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited

发明人： DOWNTON, Geoff ,  HORNBLOWER, Peter ,  BAYLISS, Martin ,  RICHARDS, Edward

IPC分类号： E21B47/024

CPC分类号： E21B47/024 ,  E21B7/067

摘要： Exhaust pressure from at least one actuator (34,36) which can tilt joint (6) of a bottom hole assembly (4) can be utilized to determine the direction (26) tiltable joint (6) is pointing (e.g., orientation, angular displacement, and/or inclination and azimuth). In one embodiment, a known exhaust pressure can be correlated to a known orientation and/or angular displacement, and the measured exhaust pressure can be compared to the known exhaust pressure to determine the orientation and/or angular displacement. In another embodiment, the flow rate of fluid exhausted from an actuator (34,36) can be derived from the exhaust pressure. The exhaust flow rate can then be used to calculate the state of actuation, which can allow determination of the angular displacement of the tiltable joint (6). Orientation and/or angular displacement with respect to the bottom hole assembly (4) can be resolved into an inclination and azimuth with respect to a formation (14).

公开(公告)号：EP2978932A1

公开(公告)日：2016-02-03

申请号：EP14774096.3

申请日：2014-03-19

申请人： Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited ,  Schlumberger Technology B.V.

发明人： HORNBLOWER, Peter ,  BOGATH, Christopher C. ,  BOWLER, Adam ,  SUGIURA, Junichi

IPC分类号： E21B47/02 ,  E21B7/04

CPC分类号： E21B7/06 ,  E21B45/00 ,  E21B47/022 ,  E21B47/124

摘要： A downhole closed loop method for controlling a drilling toolface includes measuring first and second attitudes of the subterranean borehole at corresponding first and second upper and lower survey stations. The first and second attitudes are processed downhole while drilling to compute an angle change of the subterranean borehole between the upper and lower survey stations. The computed angle change is compared with a predetermined threshold. This process may be continuously repeated while the angle change is less than the threshold. The first and second attitudes are further processed downhole to compute a toolface angle when the angle change of the subterranean borehole is greater than or equal to the threshold. The toolface angle may then be further processed to control a direction of drilling of the subterranean borehole.

摘要翻译： 用于控制钻井工具面的井下闭环方法包括测量相应的第一和第二上和下勘测站处的地下钻孔的第一和第二姿态。 第一和第二态度在钻井时在井下进行处理以计算上部和下部测量站之间的地下钻孔的角度变化。 计算出的角度变化与预定的阈值进行比较。 当角度变化小于阈值时，该过程可以连续重复。 当地下钻孔的角度变化大于或等于阈值时，进一步处理第一和第二姿态以计算工具面角度。 然后可以进一步处理工具面角度以控制地下钻孔的钻进方向。