Self-reliance type plunger system

Abstract

The invention discloses a self-reliance type plunger system, and belongs to the technical field of oil and gas exploitation. The self-reliance plunger system comprises a plunger and a monitoring system, the plunger comprises a salvaging head, a cylinder body connected to the lower end of the salvaging head and sliding along the inner wall of an oil pipe in a sealing mode, a base connected with thelower end of the cylinder body and provided with a plurality of through holes formed in the side wall, a valve core capable of being sleeved in the base axially and slidably and sliding upward untilthe valve core and the lower end surface of the cylinder body are in sealing arrangement, a top rod with the upper end extending into the base, and a pressure meter arranged on the top rod and electrically connected with the monitoring system, wherein the top rod is connected to the lower end of the valve core. According to the self-reliance type plunger system, a well mouth is prevented from being transformed, the labor intensity is reduced, operation time is shortened, it is avoided that the fluctuation of pressure difference in a well is larger, and fluctuation of an oil-gas well is reduced; in addition, the motion state of the plunger can be monitored, the weight of the plunger can be reasonably adjusted, and the system is beneficial for conducting water draining and gas collecting onthe oil-gas well or improving the liquid carrying capacity.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a self-operated plunger system. Background technique [0002] Oil and gas well drainage and gas recovery technology is a technology to solve the excessive liquid accumulation or water production in the wellbore and bottom of the oil and gas well, and restore the normal production of the coal oil and gas well. With the development of social economy, the demand for natural gas is gradually increasing. In the process of exploiting natural gas, there is generally liquid accumulation in the wellbore of the oil and gas well. If the liquid accumulation is not discharged from the wellbore of the oil and gas well in time, the production capacity of the oil and gas well will be reduced. Therefore, it is necessary to provide an effective oil and gas well drainage gas recovery method. craft. [0003] The plunger gas lift drainage process is a commonly used process in the o...

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Problems solved by technology

[0005] Before drainage and gas recovery of oil and gas wells, the wellhead device needs to be improved, such as installing a membrane pneumatic valve, which increases labor intensity and operating time; in addition, the up and down movement of the plunger is realized by the switch of the membrane pneumatic valve, which It is easy to cause the fluctuation of pressure difference in the well to increase, resulting in serious sand production at the wellhead

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