Multifunctional annular oil-gas-water multiphase flow corrosion simulation test device

Abstract

A multifunctional annular oil-gas-water multiphase flow corrosion simulation test device comprises a control cabinet, a gas-liquid separator, an electric heater, a gas supercharger, a gas flowmeter, a screw pump, a fluid flowmeter, a static mixer, a corrosion detection probe, a rotatable joint, a corrosion detection pipe section, a corrosion hanging device, and a corrosion reaction vessel. Both a gas source pipeline and a gas outlet pipeline of the gas-liquid separator are connected with an inlet of the gas supercharger; an outlet pipeline of the gas supercharger is connected with an outlet of the static mixer; both a liquid source pipeline and a liquid outlet pipeline of the gas-liquid separator are connected with an inlet of the screw pump; an outlet pipeline of the screw pump is horizontally connected with an inlet of the static mixer through the fluid flowmeter; a temperature sensor is disposed at the outlet of the static mixer; an outlet pipeline of the static mixer is connected with the corrosion reaction vessel through the corrosion detection pipe section; an outlet pipeline of the corrosion reaction vessel is connected with a gas-liquid inlet of the gas-liquid separator; the corrosion detection probe is disposed at the front end or the back end of the corrosion detection pipe section.

Description

technical field [0001] The invention relates to a corrosion test simulation device, in particular to a set of multi-phase flow corrosion indoor simulation system of a ring-type oil field production and transportation system with multiple test functions, which belongs to the field of oil field chemical corrosion and protection evaluation. Background technique [0002] The oil-gas-water multiphase flow medium in oilfield production and transportation pipelines often causes local internal corrosion and perforation of pipelines, which will lead to oil leakage, damages, production shutdown and maintenance, etc., resulting in huge economic losses. Especially the development of high water-cut oilfields and the large-scale application of some new technologies for enhanced oil recovery, such as CO 2 Flooding, polymer flooding technologies, etc., will make the corrosion problem of production and transportation pipelines more prominent, seriously affecting oilfield production. Therefo...

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Problems solved by technology

[0005] 2) The corrosion test function is single and one-sided: the internal fixed corrosion coupons are routinely used for testing, but obviously there are obvious differences in the corrosive media in contact with different parts of the oil-gas-water mixed pipeline, so the collected data is one-sided and cannot reflect the actual circumferential corrosion of the pipeline

[0006] 3) It is impossible to realize the arbitrary inclination simulation of the direction of the pressurized pipeline: In actual working conditions, pipelines involving inclined direction, such as river crossing and mountain laying, are often encountered, and the corrosion behavior under this condition has not been successfully simulated in the laboratory

A few foreign multiphase flow research devices use flexible hoses to simulate arbitrary inclination angles, but rigid pipes under pressure cannot yet achieve arbitrary inclination angle transformations

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