Foaming agent downhole stirring device applicable to foam draining gas recovery process

Abstract

The invention provides a foaming agent downhole stirring device applicable to the foam draining gas recovery process. The foaming agent downhole stirring device comprises a working barrel, rotating blades, spiral guide rails, a rotary diversion head, bearings and shaft barriers. The whole device can be installed in a tubing nipple. An inside chamber of 45 degrees is arranged at the inlet end of the working barrel. The four uniformly-distributed spiral guide rails are arranged on the inner wall of the working barrel. The rotary diversion head is provided with three spiral channels which are circumferentially and uniformly distributed and can be used for changing the flowing track of fluid, so that counterforce is provided for the rotary diversion head and enables the rotary diversion head to rotate. The rotating blades are connected with a rotary shaft through spot welding, and serve as a second power source. The inlet end of the working barrel and the outlet end of the rotary diversion head are each provided with two bearings and two shaft barriers correspondingly so that the rotating friction force of the whole device can be reduced, and the bearings and the shaft barriers are used in cooperation with the tubing nipple. The rotary division head, the rotating blades and the spiral guide rails serve as the power source and have the effect of stirring, the foam generating quantity is greatly increased, and the foam draining efficiency is improved.

Description

technical field [0001] The invention belongs to a foam drainage gas recovery device for a gas production well in an oil and gas field, in particular to a foaming agent downhole stirring device suitable for a foam drainage gas recovery process. Background technique [0002] During the production of gas wells, liquid accumulation or water production may occur in the wellbore of the gas well and the formation near the bottom of the well, which will affect the normal production of the gas well. The foam drainage and gas recovery technology is a classic physical and chemical method to solve the liquid accumulation in gas wells. A certain amount of foam drainage agent is added to the tubing or casing. The bottom is carried to the ground to achieve the purpose of clearing the bottom fluid. However, after the foaming agent is injected into the gas well, the foaming effect is not good, the liquid carrying effect is poor, and the drainage efficiency is low due to the influence of fac...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a foaming agent downhole stirring device suitable for the foam drainage and gas recovery process, aiming to solve the problems of poor foaming effect of the foam drainage agent, small amount of liquid carried by the foam, and low efficiency in the process of foam drainage in the well

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