A Downhole Self-operated Forced Vortex Drainage and Gas Production Device

Abstract

The invention relates to a downhole self-supporting forced eddy drainage gas recovery device. The downhole self-supporting forced eddy drainage gas recovery device comprises a spiral slow generator. The spiral slow generator is connected with an ordinary gear train, the ordinary gear train meshes with a pneumatic actuating end through an internal gear, and an elastic shear pin is connected with the pneumatic actuating end and a center pipe. The pneumatic actuating end is inserted into a turbine stator, and the center pipe is connected with the turbine stator. A machine frame is connected to the upper part of the center pipe, and a rubber ring and an elastic body sleeve the outer surface of the center pipe. A pin is installed on the lower part of the elastic body, the pin is connected withthe elastic body and an elastic body spring, and the elastic body spring loosens and is tightly attached to the inner wall of an oil pipe to realize clamping of the whole device when approaching the predetermined position in the lowering process; then the elastic shear pin is cut under the excitation force, the spiral slow generator, the machine frame, the ordinary gear train, the pneumatic actuating end, the center pipe, the turbine stator and the like move downwards along the axis of the oil pipe relative to a coupling, the rubber ring is compressed and subjected to annular clearance gap seal with the oil pipe; and when the spiral slow generator rotates at a high speed, the internal design enables fluid flowing nearby the spiral slow generator to obtain higher swirling intensity.

Description

technical field [0001] The invention relates to the technical field of drainage and gas production in low-pressure and low-yield gas wells, in particular to an underground self-operated forced vortex drainage gas production device. [0002] technical background [0003] The application and mechanism research of vortex drainage gas production technology is gradually mature. The main principle is that after the fluid in the well passes through the vortex drainage gas production tool (device), the original flow pattern will be transformed into annular flow or even annular mist flow , has a significant effect on the improvement of gas well recovery. Existing vortex drainage gas production devices mainly include downhole vortex drainage gas production tools, jet vortex drainage gas production tools, and downhole vortex drainage gas production tools. The swirl intensity and swirl duration of the fluid are limited. SUMMARY OF THE INVENTION [0004] In order to overcome the above...

AI Technical Summary

Problems solved by technology

Existing vortex drainage and gas recovery devices mainly include downhole vortex drainage and gas recovery tools, jet vortex drainage and gas recovery tools, and downhole full-hole vortex drainage and gas recovery tools. The swirl strength and swirl duration of the fluid are limited

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