Oil Well Stimulation Device

Abstract

The invention provides an oil well liquid increasing device. The oil well liquid increasing device comprises a center pipe, a valve housing, a check valve arranged in the valve housing and a liquid inlet connected to the lower end of the valve housing. The upper end of the center pipe is connected with the tail end of a lifting pipe column of an oil well pump, the lower end of the center pipe is connected with the upper end of the valve housing, a soft plunger is arranged on the portion, connected with the valve housing, of the outer wall of the lower end of the center pipe, and the soft plunger and an oil well casing pipe are kept sealed. According to the oil well liquid increasing device, the check valve can be automatically closed when the oil well liquid increasing device moves upward along with retraction of the lifting oil pipe, the negative pressure of oil below the device is increased, production pressure difference of an oil layer is increased, the suction effect on the stratum is enhanced, the oil outflow amount of the stratum is increased, and thus the purpose of increasing the liquid production capacity of the oil layer and the oil production capacity of an oil well is achieved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to an oil well liquid increasing device. Background technique [0002] In the development process of existing domestic oilfields, more than 95% are to adopt the mode of pumping and lifting of the downhole reciprocating conventional pump to drive the donkey head pumping unit to produce oil. Because the oil pumping method is simple, durable and adaptable to the environment, it is widely used in domestic oil fields. However, the donkey head pumping unit developed and applied in the existing oil field drives the downhole reciprocating conventional pump to lift oil through the sucker rod, because the oil pipe and the pump rod have elastic expansion and contraction (0.04% each) when the load is exchanged during work, especially for When pumping deep wells with a depth of more than 2000 meters, the elastic expansion and contraction of the tubing is longer, and most oil wells are ...

AI Technical Summary

Problems solved by technology

However, the donkey head pumping unit developed and applied in the existing oil field drives the downhole reciprocating conventional pump to lift oil through the sucker rod, because the oil pipe and the pump rod have elastic expansion and contraction (0.04% each) when the load is exchanged during work, especially for When pumping and lifting deep wells with a depth of more than 2000 meters, the elastic expansion and contraction of the tubing is longer, and most oil wells are wasted because they do not make reasonable use of the energy of the free expansion and contraction of the lifting tubing

Therefore, the efficiency of the oil production method using the donkey head pumping unit to drive the downhole reciprocating conventional pump to lift oil is low, often only about 30%, so various oil fields waste a lot of energy in this aspect

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