A heavy oil hydrolysis defoamer and its control method

Abstract

The invention discloses a thickened oil hydraulic power decomposition defoamer and a control method. The thickened oil hydraulic power decomposition defoamer comprises a swirling flow device which coincides with a horizontal central line of a separator tank, and the swirling flow device is connected with the inner part of the separator tank through a fixed plate. The swirling flow device comprises a fluid inlet, a swirling flow field, a gas pipeline outlet, a liquid pipeline outlet and a pressure pump, wherein the fluid inlet is connected to a thickened oil pipe through a fixed hole in the separator tank and is used for introducing the thickened oil; the upper end of the swirling flow field is connected to the liquid inlet, the lower end of the swirling flow field is connected to a liquid pipeline, and the swirling flow field is used for separating liquid from gas in the thickened oil; the gas pipeline outlet is fixed at the upper part of the swirling flow device and is used for discharging the separated gas; the liquid pipeline outlet is fixed at the lower part of the swirling flow device and is used for discharging the separated liquid; the pressure pump is arranged at the bottom of the swirling flow device and is used for controlling the vacuum degree in the swirling flow device. According to the thickened oil hydraulic power decomposition defoamer and the control method, the particle size of foams contained in the thickened oil can be reduced from 337 micrometers to 24 micrometers, and thus the problem that it is difficult to get rid of the foams in the thickened oil is solved.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploration and testing. More specifically, the present invention relates to a heavy oil hydrolysis defoamer and its control method. Background technique [0002] At present, with the continuous exploitation of offshore oil and gas resources, the reserves of exploitable high-quality crude oil are continuously decreasing, and the demand for production and development of heavy oil wells is increasing day by day. When the gas condition occurs, when the crude oil flows into the metering tank, the liquid level will be falsely high, affecting the accurate measurement of crude oil, and also affecting the normal operation of the entire well test and the accuracy of data acquisition. [0003] The solution used before is to heat during the flow of the fluid, and at the same time use a simple swirl tube for viscosity reduction. The main structural feature is to install a filter at the bottom of the ...

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Problems solved by technology

[0002] At present, with the continuous exploitation of offshore oil and gas resources, the reserves of exploitable high-quality crude oil are continuously decreasing, and the demand for production and development of heavy oil wells is increasing day by day. When the crude oil flows into the metering tank, the liquid level will be falsely high, which will affect the accurate measurement of crude oil, and also affect the normal operation of the whole well test and the accuracy of data collection.

[0003] The solution used before is to heat during the flow of the fluid, and at the same time use a simple swirl tube for viscosity reduction. The main structural feature is to install a filter at the bottom of the swirl tube, but this proposed device is very poor in degassing effect , when the viscosity of crude oil is high, the fluid will stick to the inner wall of the swirl tube, which will not have the effect of defoaming and degassing

[0004] There is only a simple reflector inside the crude oil separator. This equipment has a poor separation effect in the initial stage of gas-containing heavy oil, and cannot achieve the degassing effect. Instead, it will increase the foam of the heavy oil. Therefore, it is necessary to improve the defoaming equipment and methods.

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