Plunger gas recovery device capable of achieving continuous production of gas well without well shutdown

Abstract

The invention provides a plunger gas recovery device capable of achieving continuous production of a gas well without well shutdown. The main purpose of the invention is to provide a novel plunger gas recovery device with good performances and a reliable structure so as to achieve the continuous production of the gas well and improve the drainage efficiency. The plunger gas recovery device is characterized by including a push rod, a blowout preventer, a shaped spring, a rubber sleeve of the shaped spring, an assembled piston, a piston ball, a piston ball fixing piece, a cushion pad, a maintaining steel ring of the cushion pad, a cushion spring and the like; the assembled piston includes an upper piston body and a lower piston body, the upper piston body, the lower piston body and a ball body are combined to form a whole piston structure, the upper piston is connected with a steel ball fixing piece, the matched shaped spring and a matched sleeve cylinder structure are connected with the upper piston, the lower portion of an oil pipe is provided with the cushion pad and the maintaining steel ring of the cushion pad, and the cushion spring is fixed between a lower structure and the cushion pad; when moving to the largest height, the piston is fixedly connected with the push rod, and the total length of the push rod is about 1.5 times the total length of the assembled piston so as to push the ball body to move down without the well shutdown.

Description

technical field [0001] The invention relates to a split-type plunger gas recovery device which is applied in the field of oil and gas field development and can realize continuous production of oil and gas without shutting down the well. Background technique [0002] When the gas well is in production, some liquid will be produced. When the gas flow rate in the wellbore is greater than the liquid-carrying critical flow rate, the liquid will be carried to the surface by the gas in the form of droplets. When the gas flow rate is low and cannot provide enough energy to make the fluid in the wellbore flow out of the wellhead, the liquid will flow in the opposite direction to the gas and accumulate at the bottom of the well, which will eventually lead to fluid accumulation at the bottom of the well. With the intensification of liquid accumulation, the gas production rate of the gas reservoir decreases, the production of a single well decreases rapidly, the self-spraying ability of...

AI Technical Summary

Problems solved by technology

However, the conventional plunger gas lift process has a big defect: it is mainly reflected in discontinuous production, large falling resistance, long working cycle and reduced lifting efficiency.

At the same time, during the fall of the plunger, due to the small flow area, the plunger receives greater resistance when falling, and the shut-in time is long, which reduces the lifting efficiency.

And because the process needs to open and close the well, the ground control mechanism is complicated, resulting in discontinuous production process

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