Oil pumping unit integrating linear speed regulation and ultralow stroke frequency of motor

Abstract

The invention provides an oil pumping unit integrating linear speed regulation and ultralow stroke frequency of a motor. According to the oil pumping unit, an integrally manufactured walking beam is adopted, one end of the walking beam is connected with a mounting horse head, and the other end of the walking beam is connected with one end of a connecting rod through the connecting rod and a walking beam connecting bearing; the other end of the connecting rod is connected with the middle part of a crank, one end of the crank is connected to a speed output shaft of a reduction gearbox, and an input shaft of the reduction gearbox is connected with a large belt pulley; the large belt pulley is connected to an output shaft of a linear speed regulation device through a belt; and the walking beamis connected to a bracket through a central bearing assembly, and the walking beam and the bracket are integrally assembled, so that the oil pumping unit is formed. The oil pumping unit is driven towork through a transmission belt; the linear speed regulation device adopts a non-clutch design, is integrated and replaces an original power motor; and the stroke frequency of the oil pumping unit iscontrolled through a linear gear shift regulator, and reaches 0.2-8 times/minute or a lower stroke frequency.

Description

technical field [0001] The invention belongs to the fields of oil field exploitation and shale gas recovery. In particular, it relates to an oil pumping unit integrated with linear speed regulation of electric motor and ultra-low stroke frequency. Widely used in oil fields to produce crude oil and shale gas. Background technique [0002] In the prior art, the annual electricity cost of the pumping unit exceeds 40% of the total cost of oil extraction; the starting current is large, the operation consumes a lot of power, and the horse-drawn cart is large. Every well is an electric tiger. Grid power has not been able to come down. [0003] As the oil well ages, the oil production rate gradually decreases, and it is necessary to reduce the number of pumping strokes to improve the operating efficiency. However, the motor configured for conventional pumping units exceeds 3 strokes per minute, and it is difficult to realize the adjustment of large-span variable strokes, and the...

AI Technical Summary

Problems solved by technology

Although these two methods can save about 10% of electricity per unit, the frequency conversion pollutes the power supply, often causing large-scale power outages in oil production plants; and the service life of permanent magnet motors is only two years, and the power consumption after two years is lower than that of ordinary motors. be 20% higher

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