Deep well exhaust device and method in oil exploitation process

Abstract

Disclosed is a deep well exhaust device in the oil exploitation process. The device comprises an exhaust valve, an energy accumulator, a two-position three-way electromagnetic valve and a controller.The energy accumulator is communicated with a port A of the two-position three-way electromagnetic valve through a pipeline, a port P of the two-position three-way electromagnetic valve is communicated with an oil cabinet through a pipeline, a port R of the two-position three-way electromagnetic valve is communicated with a liquid inlet of the exhaust valve through a pipeline, an exhaust port of the exhaust valve is communicated with a fire resisting cap through an exhaust pipe, an air inlet of the exhaust valve is communicated with a deep well through an air inlet pipe, the controller controls the two-position three-way electromagnetic valve, the device further comprises a pressure sensor connected to the air inlet pipe, and the pressure sensor transmits a monitored signal to the controller. The device is used for solving the problem that an adverse influence is caused by associated gas on working reliability of an exploitation device in the oil production process, and the invention provides a deep well exhaust device and method for the oil exploitation process.

Description

technical field [0001] The invention relates to a deep well exhaust device and method in the process of oil exploitation. Background technique [0002] At present, in oil field production operations, electric submersible pump production systems are mostly used for artificial lift production of oil wells, and the associated gas in the formation fluid is released through the gas release valve on the cable packer in the production string. Based on the protection of the effective life of the electric submersible pump and production casing, more and more closed production systems are now used. Since the electric submersible pump is in a closed diversion space, the associated gas in the formation fluid has no venting channel to release. Therefore, it tends to accumulate in closed systems. With the extension of production time and the change of formation fluid properties, more and more associated gas will be formed, and a gas cluster with a certain pressure will be formed at the u...

AI Technical Summary

Problems solved by technology

When the liquid level drops below the working liquid level of the electric submersible pump, it will affect the working performance of the electric submersible pump, cause the motor to run idly, and even cause serious consequences such as motor burnout, which will cause great losses to oil field development

Although there have been some successful examples of using the sealed production space of oil wells in China, there is still no good solution for the release of associated gas, so the sealed system can only be applied to oil wells with a very low gas-oil ratio, which limits its use. scope

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