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A system and method for suppressing stick-slip vibration of drill pipe

A stick-slip vibration and drill pipe technology, applied in the fields of geological exploration and oil drilling, can solve the problems of complex hardware connection, unstable system operation, and unsatisfactory effect.

Active Publication Date: 2016-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The system solves the problems of complex hardware connection, unstable system operation and unsatisfactory realization effect in the prior art

Method used

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  • A system and method for suppressing stick-slip vibration of drill pipe
  • A system and method for suppressing stick-slip vibration of drill pipe
  • A system and method for suppressing stick-slip vibration of drill pipe

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Embodiment Construction

[0080] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0081] Such as figure 1 Shown, the present invention suppresses the system of stick-slip vibration of drill rod, comprises:

[0082] The controlled object includes the gearbox connected to the driving motor, and the drill pipe and drilling tool assembly driven by the gearbox to realize oil drilling; the frequency converter includes the PLC control system, which controls the start, stop and The working state of speed regulation can set the main given speed of the motor, and the frequency converter can feed back the current state of the drive motor to the control unit; the control unit, including the stick-slip suppression controller, is used to monitor the current state of the drive motor Carry out control adjustments to suppress the torque oscillation and speed oscillation of the drill pipe and drill tool assembly; the human-computer interac...

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Abstract

The invention discloses a system and method for restraining stick-slip vibration of a drill rod. The method comprises the steps that (1) a transducer provides a motor main given rotation speed through a PLC control system, the main given rotation speed is transmitted to a controlled object to obtain a motor actual rotation speed and motor actual torque; (2) the transducer transmits the motor actual rotation speed and the motor actual torque to a control unit; (3) meanwhile, a human-machine interaction device transmits information of a drill rod and drilling too combination structure to the control unit; (4) the control unit obtains an auxiliary given value optimized rotation speed through optimization calculation according to the control algorithm; (5) the control unit transmits the auxiliary given value optimized rotation speed to the transducer through a CAN bus to be superposed to the motor main given rotation speed, and the superposed rotation speed controls the rotation speed of a drive motor. By means of the method, the actual drill rod parameters can be accurately obtained, the motor actual rotation speed and the motor actual torque are displayed in real time, the purpose of restraining the stick-slip vibration of the drill rod in the petroleum drilling process is achieved, and the problems that in the prior art, hardware connection is complex, system work is not stable, and the realization effect is not ideal are solved.

Description

technical field [0001] The invention belongs to the technical fields of oil drilling, geological exploration and the like, and relates to a system and method for suppressing stick-slip vibration of drill pipes based on control algorithms, bus communication technology and human-computer interaction technology. Background technique [0002] Due to the complex formation and uncertain drill pipe movement during oil drilling, drill pipe vibration is prone to occur, including lateral vibration, axial vibration and stick-slip vibration of the drill pipe. Among them, the stick-slip vibration is the torque oscillation caused by the frictional moment between the drill bit and the formation. The speed of the drill bit may stop or rotate, and the instantaneous speed is very large, which may easily cause the performance deterioration of the drill pipe and the drill bit; this phenomenon not only affects the drilling efficiency but also threatens the drilling efficiency. Therefore, it is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
Inventor 章莉敏李江红崔丽娜王关征李科付蒙侯媛媛张文龙
Owner NORTHWESTERN POLYTECHNICAL UNIV
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