Pressure monitoring and relieving device for closed oil well

Abstract

The invention discloses a pressure monitoring and relieving device for a closed oil well. The pressure monitoring and relieving device for the closed oil well comprises an upper connecting pipe, a lower connecting pipe, a gate valve, a bolt, a close cover bolt and a connecting cover, the upper end of a substrate is connected with the upper connecting pipe, the lower end is connected with the lower connecting pipe, one side end is connected with a GSM pressure warning device while the other side end is connected with the gate valve, the gate valve is connected with a gate valve close cover, and the upper connecting pipe is connected with a single-hole exhaust valve. The liquid surface in an oil pipe ascends due to water injection, fracture, geological movement and the like formation pressure change of the closed oil well, the gas is discharged through an automatic exhaust valve, when the liquid ascends to the well mouth, the automatic exhaust valve is closed, when the pressure rises to 2 Mpa, the pressure warner works, the GSM warner sends out buzzing for three minutes, a built-in GSM card sends five short messages to a fixed mobile phone number to give an alarm, a manager goes to the site to connect pipelines and open the gate valve to lower the pressure in the oil well after receiving the short messages, and then the manager disassembles the automatic exhaust valve and uses an oil extraction vehicle to extract the liquid; the pollution is avoided, and the hidden danger is lowered; the pressure monitoring and relieving device for the closed oil well is simple in structure, convenient to manufacture and low in cost.

Description

technical field [0001] The invention belongs to the technical field of pressure relief, and in particular relates to a pressure relief device for shutting down oil well pressure monitoring. Background technique [0002] Among the existing oil wells in my country, about tens of thousands of oil wells are shut down due to long development time or insufficient production capacity, and most of them are directly closed at the wellhead. Changes have occurred, resulting in the increase of oil and gas pressure in some shut-down wells. At present, oil well sealers and other methods are used. However, due to the considerable corrosion of crude oil, the wellhead strength of oil wells is reduced. When the shut-down well pressure exceeds the limit of the wellhead The wellhead burst, and the high-pressure oil and gas erupted, causing a lot of pollution accidents, and also brought great economic losses to the enterprise. Such accidents are often reported in the newspapers. Contents of the ...

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Problems solved by technology

[0002] Among the existing oil wells in my country, about tens of thousands of oil wells are shut down due to long development time or insufficient production capacity, and most of them are directly closed at the wellhead. Changes have occurred, resulting in the increase of oil and gas pressure in some shut-down wells. At present, oil well sealers and other methods are used. However, due to the considerable corrosion of crude oil, the wellhead strength of oil wells is reduced. When the shut-down well pressure exceeds the limit of the wellhead The wellhead burst, and the high-pressure oil and gas erupted, causing a lot of pollution accidents, and also brought great economic losses to the enterprise. Such accidents are often reported in the newspapers

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