High-temperature high-pressure multiphase flow corrosion testing method and device

Abstract

The invention discloses a high-temperature high-pressure multiphase flow corrosion testing method and a high-temperature high-pressure multiphase flow corrosion testing device. The key points are as follows: under high temperature and high pressure conditions, circular flow of a gaseous-phase corrosive medium and a liquid-phase corrosive medium and thorough contact of the two mediums with the surface of a test sample are kept so that the mechanisms of corrosive actions of factors such as flow velocity, tube ponding, and deposited elemental sulphur can be simulated and researched; and the study on the influencing rules of gaseous-phase, liquid-phase, solid-phase and multiphase flows, suspension and suspended particles on the corrosion actions is also included. The testing method and the device are capable of realizing simulation of various corrosive working conditions: measuring the corrosion resistance of a metal material under various corrosive working conditions and in corrosive environments in high-temperature high pressure gaseous-phase, liquid-phase and multiphase flow states, and measuring the corrosion resistance and the corrosion rate of an oil sleeve in exploitation states such as water-carrying exploitation and water-gathered exploitation. Besides, the corrosion resistance of the metal material is comprehensively evaluated under the multiphase flow high-temperature high-pressure corrosion condition; and the preference of the metal material in a specific corrosive environment is realized according to testing results.

Description

technical field [0001] The present invention relates to a high temperature and high pressure multiphase flow corrosion test method and device, more specifically, it relates to a high temperature and high pressure multiphase flow corrosion test method for oil and gas field material corrosion, and the present invention also relates to using the method for high temperature and high pressure corrosion test method Specimen and specimen holder for multiphase flow corrosion experiments and evaluations. Background technique [0002] In the chemical experiment of metal materials, it is necessary to evaluate the corrosion performance of metal materials used in anti-corrosion equipment, pipelines and devices in the petroleum industry and chemical industry in the gas phase, liquid phase or multiphase flow state of high temperature, high pressure and high content of corrosive media. At present, the existing high-temperature and high-pressure corrosion test methods at home and abroad gene...

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the structural limitations of the high temperature and autoclave body, the corrosive medium cannot realize the pipeline flow and cannot simulate the site conditions;

[0006] (2) The solid phase particles in the corrosive medium will sink to the bottom of the tank due to gravity, and the samples placed in the gas phase and liquid phase will not be eroded by the solid particles, so the on-site erosion and corrosion cannot be simulated;

[0007] (3) Although the rotation speed of the stirrer and the linear velocity of the sample surface can be accurately calculated, due to the certain viscosity of the corrosive medium, the relative motion between the corrosive medium and the sample occurs, which makes the relative movement speed of the sample and the corrosive medium difficult to be accurate. obtained, and the speed error increases as the stirring speed increases

[0008] In order to solve the problem that the conventional high temperature and high pressure dynamic corrosion test cannot simulate the actual working conditions on site, the present invention proposes a new high temperature and high pressure corrosion medium flow channel with the help of circulating flow high temperature and autoclave , and designed a clamping device for corrosion samples, forming a new experimental method suitable for high temperature and high pressure multiphase flow corrosion testing, which can well solve the above problems

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