Gas field water tank blowout preventer and preparation method thereof

Abstract

The invention discloses a gas field water tank blowout preventer and a preparation method thereof. The gas field water tank blowout preventer comprises a blowout preventer body formed by mutually welding multiple bends, baffles welded into the blowout preventer body and used for water flow impact pressure reduction, concentric reducers welded to the two ends of the blowout preventer body and usedfor diameter-variable pressure reduction, and flanges welded to the ends of the concentric reducers and used for external connection with equipment. When the blowout preventer is prepared, the blowoutpreventer can be rapidly and conveniently manufactured only by carrying out welded connection on the conventional bends, concentric reducers, steel plates and flanges. Effective pressure relief energy reduction of gas field water is achieved, impact energy of the gas field water is eliminated, the gas field water is prevented from entering a flash steam pipeline or a fire barrier of the flash steam pipeline, normal respiration of the flash steam pipeline and normal work of the fire barrier are effectively guaranteed, and a safe and environment-friendly guarantee is brought to production and operation.

Description

Technical field [0001] The invention relates to the technical field of oil and gas engineering storage and transportation, in particular to a blowout preventer for a gas field water tank and a preparation method thereof. Background technique [0002] Sour gas field water tanks are used to store formation water accompanying the production of sour natural gas. Gas field water tends to dissolve part of the hydrogen sulfide. At different temperatures and partial pressures, the solubility of the gas-phase solute hydrogen sulfide in the liquid solvent is different. When the solvent pressure is reduced, the hydrogen sulfide will be quickly resolved from the sulfur-containing gas field water and automatically released. At present, the domestic low-sulfur gas field water treatment , Mainly adopt normal pressure or low pressure natural flash method to precipitate flash vapor. There are three ways for the fate of flash vapor: 1. The flash vapor containing a small amount of sulfur is direc...

AI Technical Summary

Problems solved by technology

The whereabouts of the flash gas has the following three ways: 1. The trace amount of sulfur-containing flash gas is directly released into the atmosphere (such as figure 1 As shown), since the gas field water does not flow uniformly to the water tank, when the separator is manually or automatically drained, the gas field water will hit the water tank at once, and the unconstrained gas field water is fast and urgent. The mouth of the steam pipe (that is, the breathing pipe, which is used for both flash evaporation and breathing) can often be seen to spray water, which will pollute the atmosphere, endanger the station, and pose a threat to the well station staff and those around the well station. This method has not been used in recent years because of the relatively large potential safety hazards; second, after the flash gas is chemically absorbed, the tail gas is discharged up to the standard; third, the flash gas is burned through the flash gas pipeline to the torch

[0003] At present, the flash gas in the latter two ways is directly connected from the tank (such as figure 2 As shown), the flash gas pipeline is installed very low. Since the flow of water in the tank cannot be seen, the turbulence of the water when entering the tank is ignored. When the time is small, when entering the tank, there must be water rushing out of the flash steam nozzle and entering the flash steam pipe, which will affect the normal progress of flash evaporation and breathing.

[0004] Generally, there is no water retaining device at the flash gas nozzle of the water tank. When the flash gas is precipitated, due to the impact of the water in the water tank and the existence of residual pressure, part of the sulfur-containing gas field water rushes into the flash steam pipe, and flows along the flash steam pipe to the The lowest point of the pipeline, or the flow into the flame arrester of the flash gas pipeline, causes pressure to be suppressed and breathing is interrupted, which hinders the normal progress of the flash gas, increases the maintenance workload of the pipeline and the flame arrester, and brings safety and environmental risks to production and operation.

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