Intelligent control device applied to oil-field pumping unit

Abstract

The invention relates to an intelligent control device applied to an oil-field pumping unit. The intelligent control device comprises a controller, a frequency converter, a motor, the pumping unit, a control power supply module, three-phase dynamic electricity and a sensor. The three-phase dynamic electricity is connected with the control power supply module and the frequency converter separately; the control power supply module is connected with the controller; the controller controls the frequency converter to drive the motor to rotate; the motor is connected with the pumping unit; the pumping unit comprises a sucker rod and a walking beam; and the sensor is arranged on the walking beam of the pumping unit and used for sensing the position of the sucker rod and transmitting data to the controller. According to the intelligent control device, the situation that when the sucker rod moves upward, the speed is high, and when the sucker rod moves downward, the speed is slow at the time of oil pumping can be realized; the pump efficiency is increased while pump leakage is reduced; the oil pumping efficiency and the oil yield of the pumping unit are improved; and the function of energy saving is achieved, operation is stable and reliable, the service life is long, and higher practical value is achieved.

Description

technical field [0001] The invention belongs to the technical field of oil extraction equipment, and in particular relates to an intelligent control device applied to a pumping unit in an oil field. Background technique [0002] The pumping unit is the main power-consuming equipment in the process of oil field exploitation. Improving the pumping efficiency of the pumping unit well is an important task in the scientific management of oil wells. Especially under the influence of low oil prices in recent years, this work has a great impact on the efficiency and Economic benefits are of great significance. [0003] There are many factors that affect pump efficiency, but from the perspective of the three basic links of deep well pump work (the piston gives up the volume, the liquid enters the pump, and the liquid is discharged from the pump), it can be summarized into three aspects: sucker rod string and tubing string The elastic expansion and contraction of the pump, the influe...

AI Technical Summary

Problems solved by technology

The factors affecting the leakage of the pump barrel are analyzed as follows: within a certain period of time after the pump is put into operation in the oil well, the leakage is not large; but when the liquid is corrosive or contains sand, the leakage will be reduced due to corrosion and wear of the pump. Rapid increase; at the same time, the wax deposition, scaling and sand deposition in the pump will make the valve not close tightly, or even get stuck, which will seriously damage the pump work, cause the pump efficiency to decline, and affect the oil well production

Usually the pumping unit control system only starts the motor directly, or starts the operation through the frequency converter, which does not significantly improve the oil production or energy saving of the oil field

Images