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The development of modern process control systems for mechanized oil production using sucker-rod pumping units (SRPU), in particular during periodic well operation, requires information not only on the parameters of the reservoir, well and operation mode, but also the technical condition of surface and underground equipment. On the basis of the analysis carried out on the well-known dynamometric and wattrographic methods of diagnosing the SRPU, it was shown that the most promising of them is the wattrographic. It allows you to monitor the technical condition of the pumping unit, in particular, using the wattmetrogram, the balance of the pumping unit and its efficiency can be calculated, and analyzing the spectrum of the power meter allows you to determine vibration and shock loads, which allows you to diagnose defects in the gearbox and bearings of the pumping unit. The method makes it possible to diagnose also the breakage of belts and rods. The possibility of using the Sinamics G 120 frequency converter, which is a functional component of the WEB-oriented control system is considered as a power sensor for the implementation of the atmetrographic method. The frequency converter Sinamics G 120 allows you to get arrays of instantaneous values of current and voltage, as well as parameters such as active, reactive and total power, power factor, effective values of currents and voltages for each phase. The developed method of mathematical processing of metthological paper is given, which forms the basis of the improved metascic method of diagnosing SRPU. The initial data for the analysis of the metro is the arrays of instantaneous values of active power for one period of the beginning of the SRPU. The procedure for processing metastrogram for diagnosing defects in bearings, gears, rocking machine and other defects is shown.
Sucker rod pumping unit, measuring method, frequency converter, diagnosing, technique, defect
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