A four-phase separator for oil, gas, water and sand

Abstract

The invention discloses an oil-gas-water-sand four-phase separator, which comprises a tank body, a swirl tube is connected to the top of the front end of the tank body, a liquid inlet pipe is connected to the swirl tube, and the lower end of the swirl tube is connected to the inside of the tank body through a swirl down pipe. Connected; the top of the tank is also connected with a gas phase outlet; the tank is provided with a corrugated plate group connected to the inner wall of the tank, an oil weir plate, an oil chamber and a water chamber in sequence from front to back; the lower end of the oil chamber is connected with an oil discharge pipe, and the lower end of the water chamber A drain pipe is connected, and a baffle curved plate is connected to the front side of the tank body. The lower end port of the swirl down pipe faces the baffle curved plate, and an inclined downstream plate is arranged under the baffle curved plate, and both sides of the downstream plate are connected to the tank. On the side of the body; below the downstream plate, there is a sand storage tank connected to the bottom of the tank, and the lower end of the sand storage tank is provided with an opening and closing valve; the bottom of the tank is connected to a sediment cleaning machine that can automatically clean the sediment on the bottom of the tank components. The separator can not only realize the effective separation of oil, gas and water, but also realize on-line and off-line sand cleaning, and the cleaning is more thorough.

Description

technical field [0001] The invention relates to the technical field of petroleum multiphase separation devices, in particular to an oil, gas, water and sand four-phase separator. Background technique [0002] In oil and gas field surface engineering, oil well production fluid is mostly a mixed liquid composed of oil, gas, water, sand, etc., and the mixed liquid migrates in the formation pores and wellbore, inevitably carrying solid impurities such as sediment. The three-phase separator is an indispensable equipment for the separation of oil, gas and water. When the three-phase separator is working, the mixture of oil, gas and water enters the degassing chamber, and a large amount of crude oil associated gas is removed by cyclone separation and gravity. Then the degassed oil-water mixture enters the pretreatment chamber, where it settles initially, and is consolidated and rectified by the corrugated plate group to pierce the foam caused by the tumbling of oil and water, and t...

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Problems solved by technology

[0003] The problem in the prior art is that the three-phase separator cannot effectively remove sediment. After long-term use, impurities such as sand and stones are deposited at the bottom of the separator, and accumulation for a long time can cause nozzle blockage and affect the separation effect. In particular, the accumulation of sediment and impurities in the horizontal oil-gas-water three-phase separator used to separate sea oil is more serious

In the prior art, a sand outlet is generally connected to the bottom of the separator, and the sand falls into the sand outlet, and then the sand outlet is opened to unload the sand. However, this method can only discharge the sand impurities near the sand outlet, and there is a problem of sand cleaning. Dead corners; it is more thorough to clean up manually by entering the interior of the separator, but it needs to be shut down, and it is time-consuming and laborious

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