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A system and method for suppressing stick-slip vibration of drill pipe based on active damping method

An active damping and stick-slip vibration technology, which is applied to the automatic control system of drilling, drilling equipment, earthwork drilling and production, etc., can solve problems such as unsatisfactory realization effect, unstable system operation, and complicated hardware connection

Active Publication Date: 2016-06-15
NORTHWESTERN POLYTECHNICAL UNIV
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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 based on active damping method
  • A system and method for suppressing stick-slip vibration of drill pipe based on active damping method
  • A system and method for suppressing stick-slip vibration of drill pipe based on active damping method

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Embodiment Construction

[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] Such as figure 1 Shown, the system of suppressing the stick-slip vibration of drill pipe based on the active damping method of the present invention comprises:

[0073] 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 the speed regulation, and set the main given speed of the motor, the frequency converter will feed back the current state of the driving motor to the control unit; the control unit, including the active damping controller, is used to control and adjust the current state of the driving motor, suppress Torque oscillation and speed oscillation of drill pipe and drilling tool assembly; human-compu...

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Abstract

The invention discloses a system and method for controlling drill rod stick-slip vibration based on an active damping method. The method comprises the steps that (1) a motor main given rotating speed is given by a frequency changer through a PLC control system and is transmitted to a controlled object, and the motor actual rotating speed and the motor actual torque are obtained; (2) the motor actual rotating speed and the motor actual torque are transmitted to a control unit by the frequency changer; (3) meanwhile, combined structural information of a drill rod and a drill jig is transmitted to the control unit by a man-machine interaction device; (4) optimization operation is conducted on the motor actual rotating speed, the motor actual torque and the combined structural information of the drill rod and the drill jig by the control unit, an auxiliary given optimization rotating speed is obtained, and amplitude limiting is conducted on the auxiliary given optimization rotating speed by using the maximum rotating speed; (5) the auxiliary given optimization rotating speed is transmitted to the frequency changer by the control unit through a CAN bus, the auxiliary given optimization rotating speed is superposed with the motor main given rotating speed, and the rotating speed of a drive motor is controlled with the superposed rotating speed. According to the method, actual drill rod parameters can be accurately obtained, the actual rotating speed and the actual toque of the motor can be displayed in real time, and thus the purpose of controlling the stick-slip vibration of the drill rod is achieved.

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 active damping method, 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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B44/04
Inventor 宋叔飚崔丽娜李江红章莉敏刘科峰马鹏刚付蒙侯媛媛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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