Oilfield crude oil mud sand separation and cleaning device

Abstract

The invention provides a crude oil and sand separation washing device for an oil field. The crude oil and sand separation washing device comprises a separator, a solid receiving tank and a washing tank, wherein the separator is connected with an oil extraction well mouth through a liquid inlet tube and is used for performing liquid-solid separation on received crude oil in a rotational flow mode; a liquid discharge tube A for discharging separated crude oil is arranged at the top of the separator; a sand discharge hole for discharging separated sand is formed in the bottom of the separator; the solid receiving tank is mounted below the separator and is communicated with the sand discharge hole through the upper part; a sand discharge tube A is arranged at the lower part of the solid receiving tank; the washing tank is connected with the sand discharge tube A, is used for washing crude oil in the sand and comprises a liquid conveying tube which is arranged on a tank body and used for feeding in a washing liquid, a liquid discharge tube A which is used for discharging separated crude oil, a sand discharge tube B which is used for discharging washed sand, and a submerged pump A which is arranged inside the tank body and is used for providing stirring power. The device provided by the embodiment of the invention is simple in structure, high in separation efficiency, easy in automation control achievement, moreover, crude oil discharged from an oil well can be directly cleaned on line, and normal discharge of the oil well is not affected.

Description

technical field [0001] The invention relates to the field of oil production, in particular to a device for simultaneously performing mud and sand separation and cleaning on-line for crude oil flowing out of an oil production well. Background technique [0002] In the process of crude oil extraction, underground mud and sand will inevitably be brought to the surface, especially when the oil field enters the middle and later stages of exploitation, due to continuous fracturing and huff and puff oil recovery, the phenomenon of sand production will become more and more serious. The mud and sand not only bring a lot of harm to the production of pipelines and tanks, but also due to the improvement of environmental protection standards, the mud and sand discharged from the liquid production are only allowed to be discharged outside when the oil content drops to a certain standard. [0003] In the prior art, there are also cleaning solutions for mud and sand, which generally use sub...

AI Technical Summary

Problems solved by technology

First of all, this method cannot remove sand in the state of oil production, and the efficiency is low. In addition, it has no measures for cleaning sand in low-temperature heavy oil

Moreover, the energy consumption and wear of the cleaning equipment are also relatively large

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