Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A system and method for suppressing stick-slip vibration of drill pipe based on internal model control method

A stick-slip vibration, internal model controller technology, applied in the fields of oil drilling and geological exploration, can solve the problems of complex hardware connection, unstable system operation, unsatisfactory realization effect, etc., achieve simple hardware structure, good anti-interference, The effect of suppressing stick-slip vibration of drill pipe

Active Publication Date: 2016-08-17
NORTHWESTERN POLYTECHNICAL UNIV +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A system and method for suppressing stick-slip vibration of drill pipe based on internal model control method
  • A system and method for suppressing stick-slip vibration of drill pipe based on internal model control method
  • A system and method for suppressing stick-slip vibration of drill pipe based on internal model control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] Such as figure 1 Shown, the system of suppressing the stick-slip vibration of the drill pipe based on the internal model control method of the present invention includes:

[0062] 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, and set the main given speed of the motor, the frequency converter can feed back the current state of the driving motor to the control unit; the control unit, including the internal model control controller, is used to control and adjust the current state of the driving motor , to suppress the torque oscillation and speed oscillation of the drill pipe and drill too...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a system and method based on an internal model control method to restrain stick-slip vibration of drill stems. The method comprises the steps that a frequency converter gives out the main given rotation speed of a motor through a PLC control system, the main given rotation speed is transmitted to a controlled object to obtain the actual rotation speed of the motor and the actual torque of the motor, the frequency converter can transmit the actual torque of the motor to a control unit, meanwhile a man-machine interaction device can transmit drill stem and drill tool combination structure information to the control unit, the control unit can carry out optimization operation on the achieved actual torque of the motor and the drill stem and drill tool combination structure information to obtain the auxiliary given optimized rotation speed, the control unit can transmit the auxiliary given optimized rotation speed to the frequency converter through a CAN bus, the auxiliary given optimized rotation speed is overlapped with the main given rotation speed of the motor, and the overlapped rotation speed can control the rotation speed for driving the motor. The method can control the actual output of the system to be constantly equal to the expected output, the actual rotation speed and the actual torque of the motor can be displayed in real time, and accordingly the purpose of restraining the stick-slip vibration of the drill stems can be 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 a drill pipe based on an internal model control method, a bus communication technology and a 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. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05E21B44/04
Inventor 侯媛媛李江红伍志强孙大鹏刘琳刘旭礼姜庆巍章莉敏
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com