Variable-stroke-frequency device of beam pumping unit

Abstract

The invention relates to a variable-stroke-frequency device of a beam pumping unit, which comprises a motor, a movable motor mounting mechanism and a twin-cone-pulley output mechanism, wherein the movable motor mounting mechanism comprises a square soleplate which is connected with the motor and a square framework plate which is installed on the upper part of the soleplate in a pressing way, the middle part of the framework plate is provided with a square opening, the length and the width of the square opening are smaller than the length and the width of the square soleplate, four edges of the square soleplate are respectively provided with a hem, each hem is provided with a jackscrew, the jackscrew passes through the hems to be contacted with the edges of the square soleplate, the motor is installed on the middle part of the square soleplate, and a motor shaft is connected with a transmission mechanism of the beam pumping unit through the twin-cone-pulley output mechanism. During theadjusting process of the stroke frequency, a belt is free from being replaced, and the adjusting process of the stroke frequency can be completed only by adjusting the jackscrews, so the labor intensity is low, and the work efficiency is high.

Description

technical field [0001] The invention relates to the technical field of oil production equipment, in particular to a beam pumping unit variable stroke device. Background technique [0002] In the middle and late stages of oilfield development, oil wells with low liquid production and heavy oil wells consume a lot of energy, resulting in high cost and low benefit. The reason is that the pump efficiency is reduced due to insufficient liquid supply in the downhole oil layer, and even empty pumping occurs. In order to solve the contradiction of insufficient oil supply in the production dynamics of oil wells, it is generally possible to reduce the stroke frequency of the pumping unit, but in fact, the stroke change is firstly restricted by the model, and the adjustable range is small. Oil well stroke matching requirements. [0003] Most of the equipment for changing stroke times in the prior art is adjusted by the reducer. Since the reaction force of the beam pumping unit to...

AI Technical Summary

Problems solved by technology

The reason is that the pump efficiency is reduced due to insufficient liquid supply in the downhole oil layer, and there is even a phenomenon of air pumping

In order to solve the contradiction of insufficient oil supply in the production dynamics of oil wells, it is generally possible to reduce the stroke frequency of the pumping unit, but in fact, the stroke change is firstly restricted by the model, and the adjustable range is small. Oil well stroke matching requirements

[0003] Most of the equipment for changing stroke times in the prior art is adjusted by the reducer. Since the reaction force of the beam pumping unit to the transmission system is relatively large during operation, it is easy to generate a large impact on the gears inside the reducer. The wear of the gear is faster, and the damage of the reducer is faster. Due to the high cost of the reducer, the cost of oil extraction is increased and the efficiency is low.

Images