Oil-well pump energy-storage enhancing device capable of compressing natural gas automatically

Abstract

The invention discloses an oil-well pump energy-storage enhancing device capable of compressing natural gas automatically. The oil-well pump energy-storage enhancing device capable of compressing the natural gas automatically comprises an upper connector, an inner pipe, an outer pipe and a lower connector, wherein the upper connector is connected with an oil-well pump, and the lower connector is connected with a tail pipe. The oil-well pump energy-storage enhancing device capable of compressing the natural gas automatically is characterized in that the inner pipe and the outer pipe which are coaxial form an annular space with the sealed upper portion and the communicated lower portion, the annular space serves as a storage space of the natural gas separated from crude oil and an energy-storage and energy-release space for compression and expansion of the natural gas, and gas pressure-limitation holes with certain quantity and inner diameter are formed at the lower portion of the outer pipe and serve as a discharging passageway for residual gas in annular spaces of the inner pipe and the outer pipe. The oil-well pump energy-storage enhancing device capable of compressing the natural gas automatically is simple in structure, free of any moving component, stable, reliable, convenient to construct on site, and environment-friendly, and does not pollute the environment and an oil layer. The natural gas is compressed automatically as an energy-storage method, additional power is not needed, the problem of the service life in the energy-storage process of a compression spring is resolved at the same time, and the practicality is strong. The oil-well pump energy-storage enhancing device has a function as a gas anchor, is capable of preventing separated gas from entering the pump, and reduces the influence on pump efficiency when the gas enters the pump.

Description

technical field [0001] The invention relates to the technical field of oilfield mechanical oil recovery, in particular to a self-compressed natural gas oil well pump energy storage efficiency increasing device. Background technique [0002] At present, the oil well pump is the most commonly used lifting tool in the oil field, and its pump efficiency is directly related to the output and energy consumption of the oil field. Field practice shows that the pumping efficiency of the pumping wells is not high, the average pumping efficiency is mostly lower than 50%, and even the pumping efficiency of many pumping wells is lower than 30%. Especially for heavy oil wells, the pump efficiency is lower due to the large flow resistance of crude oil into the pump. Therefore, improving the pump efficiency of pumping wells is of great significance to increasing crude oil production and saving power consumption. [0003] There are many factors that affect the pump efficiency. From the per...

AI Technical Summary

Problems solved by technology

[0005] (2) The influence of the pump not being fully filled

[0007] (4) Leakage impact

However, it cannot solve the problem that the gas enters the pump, and the expansion of the gas pump occupies the space of the liquid entering the pump.

[0011] The commonality of the above several existing technologies is that the structure is relatively complicated, and there are moving parts, and the stability is relatively poor.

[0012] Through comprehensive comparative analysis, it can be seen that the existing technology mainly has the following disadvantages: (1) the structure is relatively complex, and there are moving parts, and the stability is poor; (2) the compression spring is used as an energy storage method, and the spring is prone to fatigue and damage. Seriously affect its service life; (3) It cannot solve the problem that the gas enters the pump and the expansion of the gas pump occupies the space of the liquid entering the pump

Images