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

IF 2.4 Q2 MINING & MINERAL PROCESSING Journal of Mining Institute Pub Date : 2023-03-10 DOI:10.31897/pmi.2023.20
M. Ershov, Аleksandr Komkov, E. Feoktistov
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Abstract

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.
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钻机转子可调电驱动的复杂模型
考虑并实现了转子-钻柱-钻头-岩石的异步电驱动的修正数学模型,它发展和推广了以前的研究结果。该模型包括以下子系统:具有矢量控制的异步驱动器模型;考虑钻头与岩石之间相互作用特性的钻头底部阻力矩形成模型;考虑钻柱变形的多质量机械部件模型;子系统用于钻机能源工艺参数的生成。综合模型使计算和评价所选钻井模式成为可能,考虑到它们的机电、能源和技术效率以及钻井过程的动力学。对钻井模式进行的计算机模拟证实,在钻头停止时,可能会出现粘滑效应,并伴有高频振动,这可能会改变钻头的旋转方向,加速钻头的磨损和旋脱。长时间的停钻导致平均钻头转速显著降低,这可以解释在钻头旋转不稳定区域钻井时ROP下降和能耗增加的原因。该模型可作为进一步改进旋转钻井控制系统的基础。
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来源期刊
Journal of Mining Institute
Journal of Mining Institute MINING & MINERAL PROCESSING-
CiteScore
7.50
自引率
25.00%
发文量
62
审稿时长
8 weeks
期刊最新文献
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