A gas lift intelligent booster plunger

Abstract

A gas lift intelligent booster plunger, the lower end of the plunger short joint is provided with a booster movement short joint, the booster movement short joint is provided with a thrust sleeve inside an upper joint, a lower joint is connected outside through a pressure bearing sleeve, and a lower joint is arranged in the upper joint. The lower end of the joint is provided with a lower retainer, a motor is arranged in the lower joint, a transmission shaft is connected to the power output end of the motor, a first bearing is arranged between the transmission shaft and the lower joint, and a driving bevel gear is arranged on the transmission shaft to drive the drive shaft. The bevel gear is meshed with two sets of driven booster mechanisms with the same structure and symmetrical distribution. The driven booster mechanism is that one end of the connecting shaft is provided with a driven bevel gear that meshes with the driving bevel gear, and the connecting shaft is provided with a crawling ratchet, which connects A second bearing is arranged between the other end of the shaft and the pressure-bearing sleeve, and a through groove is machined on the pressure-bearing sleeve at the position opposite to the crawling ratchet to expose the gear teeth of the crawling ratchet. Aiming at the characteristics of insufficient production capacity and low formation pressure of old wells, the invention assists in gas lift drainage and provides better guarantee for the production safety of gas wells.

Description

technical field [0001] The invention belongs to equipment for extracting oil, gas, water, dissolvable or meltable substances or minerals from a well, and particularly relates to an intelligent booster plunger in the process of gas lift and liquid discharge. Background technique [0002] Aiming at the problem of the impact of gas production on gas production in the underground formation of gas wells, a plunger gas lift device is generally used for intermittent gas lift liquid drainage. Its feature is that a gas lift valve is installed on the pipe string downhole, and by controlling the switch of the gas lift valve, the plunger is pushed to reciprocate, and the accumulated liquid in the well is driven to the surface, so as to relieve the influence of the accumulated liquid on the production of the gas well. However, there must be a certain annular gap between the plunger and the inner wall of the oil pipe during operation, which causes leakage in the liquid of the plunger. Onl...

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Problems solved by technology

However, there must be a certain annular gap between the plunger and the inner wall of the tubing when the plunger is in operation, so that leakage occurs in the plunger lifting liquid. Only increasing the outer diameter of the plunger can improve the sealing performance of the plunger, but the contact friction with the pipe wall will increase. It will lead to insufficient gas pressure in the upward process of the plunger, and the failure of gas lift drainage; at the same time, due to the serious pressure attenuation at the bottom of the well due to the long production cycle, it also leads to the lack of sufficient gas pressure to push the plunger to the wellhead, making the gas lift drainage invalid

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