Non-closed continuous lifting plunger drainage device and non-closed continuous lifting plunger drainage construction method

Abstract

The invention provides a non-closed continuous lifting plunger drainage device and a non-closed continuous lifting plunger drainage construction method. The device is mainly composed of key parts suchas a fishing head, an upper ejector rod, an upper elastic block, a lower elastic block and a lower ejector rod which are sequentially connected from up to down, wherein the upper and lower elastic blocks are in a contracted state when a plunger is placed in a production pipe string, the outer diameter is small, when a gas well is in a normal production state, the plunger can still smoothly enterthe position of a locker, under the action of gravity and inertia, when the plunger descends to the position of the locker, a lower ejector rod of the plunger knocks against the locker, the upper andlower elastic blocks are made to expand to form sealing with an inner wall of the pipe string, the plunger under the action of the uplink pressure of a gas wellbore, non-closed gas well delivery is achieved, after the plunger is at the proper place, the elastic blocks are automatically opened to achieve the automatic lifting drainage technology. The device is advantaged in that continuous gas wellexploitation can be achieved, and gas well production efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas development, and in particular relates to a non-shut-in type continuous lifting plunger drainage device and a construction method. Background technique [0002] With the prolongation of the production time of the gas well, the production of the gas well will decrease due to the insufficient supply capacity of the formation, which will reduce the gas flow rate in the wellbore and cannot carry out the liquid accumulation at the bottom of the well, and eventually water flooding will occur, so that the gas well will be forced to shut down , have a great impact on the profitable development of gas wells. There are many gas well drainage and gas recovery technologies, which are suitable for different production stages of gas wells. Among them, the plunger drainage technology can make full use of formation energy, prolong the self-spraying cycle of gas wells, and has low one-time investment and low m...

AI Technical Summary

Problems solved by technology

This method leads to intermittent production of gas wells, which affects the production efficiency of gas wells to a certain extent

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