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The speed control research on rotary valve driven by micromotor in MWD

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Abstract

The rotary valve speed control, extremely affected by nonlinear dependence of rotary valve load torque on rotation angle, affects the generation of drilling fluid pressure PSK signal and its quality. Based on load torque calculation model, the load torque feed forward compensation is used in linearized correction of rotation speed control system to enable the motor voltage to vary according to the calculation model. Additionally, the calculation model is also used in compensating the influence of serious nonlinearity in rotary valve load torque on rotation speed control. By means of closed-loop proportional-integral-derivative (PID) control which is formed by negative feedback of speed and the PID parameter values determination rule which is created by attenuating control of transient component in step response of rotary valve speed, the rapid servo control of rotary valve speed is realized. Simulink Simulation indicates that the closed-loop speed control system of rotary valve is able to track the change of control voltage pulse quickly and strongly suppress the interference influences from flow measurement error and load torque calculation model deviation.

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Acknowledgements

This work was supported by the National Nature Science Foundation of China (Grant Number 51274236).

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Authors and Affiliations

  1. College of Science, China University of Petroleum Huadong, Qingdao, 266580, China

    Lingtan Zhang, Yue Shen & Lingzhi Wei

  2. Oil and Gas Technology Research Institute, Changqing Oilfield Company, CNPC, Xi’an, 710018, China

    Gaixing Hu

  3. School of Petroleum Engineering, China University of Petroleum Huadong, Qingdao, 266580, China

    Jia Jia

  4. Drilling Technology Research Institute, CNPC, Beijing, 100195, China

    Limin Sheng

Authors
  1. Lingtan Zhang
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  2. Yue Shen
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  3. Gaixing Hu
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  4. Lingzhi Wei
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  5. Jia Jia
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  6. Limin Sheng
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Contributions

LZ and YS have performed conceptualization, methodology, investigation and have written the original draft. YS have performed funding acquisition. JJ and LW have written the software and prepared resources. All the authors have contributed to data curation, validation, formal analysis and writing-review the final draft.

Corresponding author

Correspondence to Yue Shen.

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The authors declare no conflict of interest.

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Zhang, L., Shen, Y., Hu, G. et al. The speed control research on rotary valve driven by micromotor in MWD. Microsyst Technol 28, 229–236 (2022). https://doi.org/10.1007/s00542-019-04620-y

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  • DOI: https://doi.org/10.1007/s00542-019-04620-y

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