High-temperature and high-pressure flowing device for evaluating corrosion resistance performance of materials

Abstract

The invention relates to a high-temperature and high-pressure flowing device for evaluating corrosion resistance performance of materials. The high-temperature and high-pressure flowing device comprises a high-temperature and high-pressure autoclave body, a high-temperature and high-pressure autoclave cover, a branch pipe, a branch pipe sealing device, a visual window, a blade, a flow-limiting plate, a stirring rod, a pressure sensor, a temperature sensor, a time relay, and a data collection and control system; the device is manufactured by adopting solidly forging corrosion-resistant alloy steel, achieves maximum working gas sealing pressure of 70MPa and highest working temperature of 200 DEG C, and has the advantages of acid corrosion, alkaline corrosion, chlorine gas and the like corrosion resistance as well as obvious corrosion resistance. A magnetic coupling is arranged, and the revolving speed is digitally controlled by a computer and displayed and recorded in real time, thus realizing circulating flowing of the corrosive medium.. The visual windows are arranged on the two branch pipes of the corrosion device and have equal sealing property, strength, corrosion resistance, temperature resistance, thermal fatigue service life to the high-temperature and high-pressure autoclave body, thus being capable of observing the flowing corrosion conditions of the materials and phase states of the corrosion medium in real time under different temperature and pressure conditions.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure flow device for evaluating the corrosion resistance of materials, especially for evaluating the flow corrosion of materials in corrosive media such as hydrogen sulfide and carbon dioxide under high temperature and high pressure conditions, and can observe in real time at different temperatures and pressures Flow corrosion of materials under certain conditions and the phase state of corrosive media. Background technique [0002] During the drilling and development of oil and gas wells with high sulfur content and high carbon dioxide content, the working environment of materials such as downhole pipe strings, cement sheaths, and pipe string coatings is harsh (high temperature, high pressure, and presence of corrosive media such as hydrogen sulfide and carbon dioxide). The corrosion resistance of pipe strings, cement sheaths and pipe string coatings is very high, especially during the mining pr...

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Problems solved by technology

[0007] In order to solve the shortcomings of existing high-temperature and high-pressure corrosion devices, the present invention aims to provide a device for simulating the corrosion status of materials in flowing corrosive media under actual high-temperature and high-pressure conditions underground, so as to evaluate the mining safety of acidic gas fields with high sulfur content and high carbon dioxide content. Provide experimental basis

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