Double-barrel type two-stage axial flow downhole degassing device

Abstract

The invention provides a double-barrel type two-stage axial flow downhole degassing device which is mounted between an oil pump and a sieve pipe and which is used for gas-liquid phase separation before the oil and gas well output fluid enters the pump for the first time. According to the degassing device, by means of the special double barrel type structure and the two stage axial flow technology, the output fluid gas-liquid phase separation is implemented, and the mechanical recovery system efficiency is improved; the sieve tube is communicated with an inner fluid barrel through a fluid feeding device, and the speed of the fluid being outputted by pumping is increased; an axial flow pipe assembly adopts two stage axial flow gas-liquid separation, axial flow pipes are designed in standardized and modular manners, and the output fluid can be degassed efficiently and thoroughly; the output fluid can be ejected into the axial flow pipes in the high initial velocity through the inner fluid barrel, the double-barrel annular space is formed by the inner fluid barrel and an outer fluid barrel and is used for delivering the fluid in the axial flow pipes after degassing; the degassed fluid is adjusted reversely to form the stabilized flow through a rectifier, is discharged into the outer fluid barrel and is delivered to the oil pump after being accelerated through a fluid director, and the gas is slowed and pressurized through an exhauster before being exhausted into the wellhole.

Description

technical field [0001] The invention is suitable for downhole degassing devices of oil and gas wells and unconventional gas wells, and in particular relates to a device for separating gas and oil, gas oil and water or gas and water before the produced liquid enters the pump. Background technique [0002] In the pumping system of oil and gas wells, the efficiency of the downhole pump plays a key role in the efficiency of the entire system. During the production operation of oil and gas wells, it is inevitable that the gas in the downhole production fluid enters the pump together with the liquid, and the existence of these gases directly leads to the low efficiency of the oil pumping system; In the oil process, if the necessary degassing measures are not adopted, it is easy to cause a large amount of gas to enter the oil well pump before the gas-liquid two-phase output liquid is fully separated, resulting in the occurrence of gas lock. For this reason, how to reduce the impac...

AI Technical Summary

Problems solved by technology

[0004] In summary, foreign downhole gas-liquid separation and reinjection technologies have many problems such as limited performance and difficult manufacturing, while domestic research is only in the ground test stage

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