Intelligent control system of pumping unit and its intelligent control method for pumping

Abstract

The invention relates to an intelligent control system of a pumping unit and an intelligent oil pumping control method of the intelligent control system. The aim that the intelligent control system of the pumping unit and the intelligent oil pumping control method of the intelligent control system are low in energy consumption, high in intelligent degree and high in work efficiency is achieved. The intelligent control system comprises a tower, an operating platform and a transmission device. The operating platform is arranged at the top end of the tower, the transmission device is arranged on the operating platform, the transmission device is overall arranged at the top end of the operating platform in a triangular structure, and a weight is clamped in the middle of the operating platform. A control cabinet is arranged at the bottom end of the tower, a master controller, a wireless communication device and a motor controller are arranged in the control cabinet, the work process of the pumping unit is controlled through the master controller, and the master controller is connected with a wireless network through the wireless communication device. In the work process, the output power of a motor in each stroke process is monitored, and if the output power of the motor is reduced, the speed of the motor is reduced, and the stroke frequency is reduced; if the output power of the motor rises, the speed of the motor is increased, and the stroke frequency is increased.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an intelligent control system for a pumping unit and an intelligent control method for pumping. Background technique [0002] At present, the oil extraction industry has increasingly recognized the advantages of low energy consumption and high efficiency of the tower-type combined transmission pumping unit, such as the tower-type combined transmission pumping unit disclosed in CN101413387B, which has a simple structure, stable operation, low noise, and It has a very good market prospect, but due to the limitation of the transmission structure, it cannot be used on the medium-heavy load pumping unit, and the gear structure needs to be adjusted. Once the transmission structure is applied to the medium-heavy load pumping unit, the life of the wire rope will be greatly shortened; in addition, The combined transmission mechanism is all arranged on one side of the tower, which wil...

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Problems solved by technology

[0002] At present, the oil extraction industry has increasingly recognized the advantages of low energy consumption and high efficiency of the tower-type combined transmission pumping unit, such as the tower-type combined transmission pumping unit disclosed in CN101413387B, which has a simple structure, stable operation, low noise, and It has a very good market prospect, but due to the limitation of the transmission structure, it cannot be used on the medium-heavy load pumping unit, and the gear structure needs to be adjusted. Once the transmission structure is applied to the medium-heavy load pumping unit, the life of the wire rope will be greatly shortened; in addition, The combined transmission mechanism is all set on one side of the tower, which will generate large amplitude and lateral force on the operating platform, causing damage to the equipment and burying safety hazards during the working process

[0003] In addition, in my country's oil fields, more than 85% of the oil wells use mechanical oil recovery methods, and 60% of the oil wells are low-efficiency pumping. These oil wells generally have the problem of low oil pumping efficiency, especially in low-yield wells.

According to this situation, the intermittent operation of oil wells becomes inevitable. If a reasonable intermittent pumping system is not adopted or the intermittent pumping plan cannot be accurately implemented, on the one hand it will cause high energy consumption and low benefit; on the other hand, when the oil well supply When the oil capacity is less than the displacement of the pumping unit, it will also cause a certain degree of damage to the oil production equipment. Its main disadvantage is that it cannot automatically adjust the flushing times, causing the pumping capacity of the pumping unit to be often higher or lower than the output of the oil well. If the stroke times of the pumping unit are too fast, the pumping capacity will be higher than the oil production of the oil well, resulting in empty pumping and liquid hammer, which will damage the pumping unit, sucker rod and pump, and reduce the cost of the equipment. service life, and waste of electric energy, if the stroke times of the pumping unit are too slow, the pumping capacity will be lower than the oil production of the oil well, reducing the production of the oil well and increasing the cost of pumping

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