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Evgenii A. Feoktistov
Evgenii A. Feoktistov
Student
National University of Oil and Gas “Gubkin University”
Student
National University of Oil and Gas “Gubkin University”
Moscow
Russia

Articles

Energy industry
  • Date submitted
    2022-10-13
  • Date accepted
    2022-12-13
  • Online publication date
    2023-03-10
  • Date published
    2023-07-19

A complex model of a drilling rig rotor with adjustable electric drive

Article preview

A modified mathematical model of an asynchronous electric drive of the rotor – a drill string – a bit – a rock is considered and implemented, which develops and generalizes the results of previously performed studies. The model includes the following subsystems: a model of an asynchronous drive with vector control; a model of formation of the resistance moment at the bottom of the bit, taking into account the peculiarities of the interaction between the bit and the rock; a model of a multi-mass mechanical part that takes into account the deformation of the drill string; subsystem for the drilling rig energy-technological parameters formation. The integrated model makes it possible to calculate and evaluate the selected drilling modes, taking into account their electro-mechanical, energy and technological efficiency and the dynamics of drilling processes. The performed computer simulation of drilling modes confirmed the possibility of a stick-slip effect accompanied by high-frequency vibrations during bit stops, which may change the direction of rotation of the bit, its accelerated wear and unscrewing of the drilling tool. Long bit stops lead to a significant decrease in the average bit rotation speed, which can explain the decrease in the ROP and increase in energy consumption when drilling in the zone of unstable bit rotation. The model can be used as a base for further improvement of rotary drilling control systems.

How to cite: Ershov M.S., Komkov А.N., Feoktistov E.A. A complex model of a drilling rig rotor with adjustable electric drive // Journal of Mining Institute. 2023. Vol. 261. p. 339-348. DOI: 10.31897/PMI.2023.20