A four-phase separation device for oil, gas, water and sediment

Abstract

The present invention discloses an oil, gas, water, and silt tetra-phase separation device belonging to the field of oil equipment. The device at least includes a gas storage zone, a wire mesh mist catcher, a baffle plate mist catcher, a gas-liquid separation zone, a tangential liquid inlet, a baffle, a liquid guide pipe, a weir plate, a settling dehydration zone, a separation device body, a vent pipe, an oil storage zone, a silt removing device, relevant pipelines, and relevant control circuits; the separation device body is externally connected with an associated gas constant pressure pressure-maintaining valve group, a crude oil constant pressure pressure-maintaining valve group, a dehydration constant pressure pressure-maintaining valve group, an associated gas main pipeline, an associated gas bypass, a crude oil main pipeline, a crude oil bypass, a dehydration main pipeline, a dehydration bypass, a pollution discharge pipeline and a mud discharge pipeline. Oil, gas, water and oil silt in a crude oil mixture can be efficiently separated, the separated oil, gas and water can be automatically discharged under constant pressure and at certain time to ensure the safe and stable running of the separation device. The silt at tank bottom can be automatically removed out of a tank by a silt removal device without a shutdown device.

Description

technical field [0001] The invention relates to the field of oilfield equipment, in particular to a four-phase separation device for oil, gas, water and sediment. Background technique [0002] The crude oil mixture produced from the oil well contains impurities such as water, associated gas, and sand. This crude oil mixture does not meet the quality requirements for commercial trading. Therefore, the crude oil needs to be purified to separate the impurities. [0003] At present, oil, gas, and water three-phase separators are widely used in transfer stations and joint stations of oil fields to separate crude oil and associated natural gas produced by oil wells to purify crude oil. As the crude oil mixture settles during the separation process, oil and sand will accumulate. At the bottom of the three-phase separator, manual cleaning is required, otherwise it will affect the stability and separation effect of the three-phase separator. [0004] For the separation of oil, gas, ...

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Problems solved by technology

[0006] The sand separation system of the existing four-phase separation device has a complex structure, cumbersome process, and high investment costs; the oil, gas, water and other media separated by the existing separation device do not have constant pressure and stable pressure to automatically discharge, so the pressure fluctuation of the liquid inlet It will affect the stable operation of the whole system, and then affect the separation effect of the crude oil mixture; moreover, generally only one mist arrester is used in the existing separation device, which can only achieve one-time mist removal; the cylindrical horizontal separation device occupies a large area and does not require Suitable for small transfer stations in oilfields

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