Simulation Modeling of Operation of Downhole Vibration Exciter EM Drive
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___________________________ SCIENCE OF MINING ____________________________ MACHINES
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Simulation Modeling of Operation of Downhole Vibration Exciter EM Drive B. F. Simonova*, V. Yu. Neimanb**, L. A. Neimanb, and A. O. Kordubailoa a
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia *e-mail: [email protected] b Novosibirsk State Technical University, Novosibirsk, 630073 Russia **e-mail: [email protected] Received October 21, 2019 Revised March 14, 2019 Accepted May 29, 2020
Abstract—The article presents a case-study of mathematical modeling of electromagnetic and electromechanical processes in a downhole vibration exciter EM drive. The authors propose the mathematical model of EM drive on the basis of a double-acting EM machine. This model maintains a wide-range analysis of transient and quasi-stable operating regimes. The algorithm and implementation of the model using the structural modeling methods and means in the Matlab Simulink environment are described. The model verification is carried out by means of comparison of the simulation and physical models of EM drive within the configuration of downhole pulse vibration exciter. The appropriateness of the model is proved. The authors give recommendations on further improvement of the model and its accuracy in calculation of dynamic behavior of drives. Keywords: Downhole vibration exciter, EM drive, double-acting machine, mathematical model, computation algorithm, Matlab Simulink, function chart, simulation modeling, operation, dynamic behavior. DOI: 10.1134/S1062739120036726
The depletion of the main fields in Russia and in the world reaches 70–80%, the increase in proven reserves is slow; therefore, the issue of enhancing oil recovery of the reservoirs of developed fields is still relevant. The methods of vibrowave impact [1–3] developed by the Institute of Mining, SB RAS are of particular interest [4]. The work in this direction is aimed at creating surface and downhole vibration exciters. At present, downhole vibration exciters are intensively developed, the use of which at great depths (up to 3 km) allows increasing the efficiency of the vibroseismic method due to the necessary force impact in the casing at the level of the bottomhole zone [5–7]. The concept of creating a downhole vibration exciter EM drive based on a double-acting pulse EM machine turned out to be promising in terms of energy carrier [8]. The advantage of such an electric drive is explained by the need to limit its radial dimensions to the downhole diameter and possibility of increasing the impact energy by increasing the linear dimensions, as well as design simplicity, manufacturability, high operational reliability and environmental friendliness of the energy carrier. A number of studies of operating proce
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