Soft measuring method and device for stroke period of beam-pumping unit

Abstract

The invention relates to a soft measuring method and device for a stroke period of a beam-pumping unit. A beam-pumping unit driving motor electric parameter and other signal detection unit is used for collecting three-phase instantaneous voltage and current values of a pumping unit driving motor electric energy input circuit, instantaneous active power values of the pumping unit driving motor electric energy input circuit are calculated according to an instantaneous reactive power theoretical formula or an instantaneous power definition formula, a modern information processing method is used for calculating the period of an instantaneous active power function so as to indirectly obtain the stroke period Tc of the pumping unit, and therefore a period adjusting instruction and alarming information are sent out according to whether Tc exceeds the threshold value or not. The device is composed of the beam-pumping unit driving motor electric parameter and other signal detection unit, a beam-pumping unit driving motor electric parameter processing unit and an output executing unit. The device can accurately monitor the stroke period Tc of the pumping unit, and the defects that a conventional measuring method is prone to being interfered by working environments and low in measuring accuracy, a sensor needs to be additionally arranged, and installation and maintenance are not convenient can be effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of state monitoring in the production process of oil production in an oil field and the optimal control of the operation mode of oil production equipment, and relates to an online detection method and device for the stroke cycle of a beam pumping unit, in particular to a method and device for detecting the stroke cycle of a beam pumping unit through real-time monitoring of the power distribution of the pumping unit. The invention relates to a soft measurement method and a device for realizing the stroke cycle detection of the change rule of the electric parameter of the power supply of the electric box. Background technique [0002] Real-time measurement and dynamic adjustment of the stroke cycle of the beam pumping unit, so that the pumping capacity of the pumping unit and the liquid supply capacity of the formation can be accurately matched, which is to avoid oil pumping under the constraint of constant flu...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods known in the art for detecting the stroke cycle of the beam pumping unit are the zero-crossing detection calculation method, the Hall switch sensing method and the photoelectric switch sensing method, but these methods are susceptible to interference from the working environment, measurement Defects such as low accuracy of results, additional sensors, inconvenient installation and maintenance, and unreliable performance

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