Device and method for evaluating permeability of dissolved oxygen in anticorrosive coating at high temperature and high pressure

Abstract

The invention provides a device and method for evaluating the permeability of dissolved oxygen in an anticorrosive coating at the high temperature and the high pressure. The permeability of the dissolved oxygen in the anticorrosive coating in the high-temperature-and-high-pressure environment and the permeability of the dissolved oxygen in the anticorrosive coating under the condition that the anticorrosive coating is deformed can be rapidly and accurately measured. The device comprises a high-temperature-and-high-pressure kettle, a pure coating sample installing device, a gas supply system, areal-time monitoring system and a waste gas treatment system. According to the method, the temperature is adjusted through a heating device, and through the gas supply system, pressure can be adjusted, and deoxidizing operation can be achieved by introducing inert gas according to the test requirements; the oil-tube coating service environments of different well sections of multiple water injection working conditions can be simulated, and the permeability of the dissolved oxygen in the anticorrosive coating under the simulated working conditions is monitored in real time.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings for oilfield water injection development tubing, in particular to a device and method for evaluating the permeability of dissolved oxygen in anti-corrosion coatings under high temperature and high pressure. Background technique [0002] As oilfield development enters the middle and late stages, the problem of string damage in water injection wells is becoming more and more serious, which has become a major problem that plagues the later stage of the oil industry. Among them, environmental corrosion is the most important cause of damage to injection well strings. Organic coating anti-corrosion technology has become the main anti-corrosion measure for water injection oil pipes due to its simple construction process, low cost and good anti-corrosion effect. [0003] Although organic coatings can isolate ions to varying degrees, they can improve the corrosion resistance of anti-corrosion tubing...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a device and method for evaluating the permeability of dissolved oxygen in anti-corrosion coatings under high temperature and high pressure, which is simple in operation, reasonable in design, capable of simulating actual working conditions, and can quickly and accurately measure The permeability of dissolved oxygen in anti-corrosion coating under high temperature and high pressure environment and the permeability of dissolved oxygen in anti-corrosion coating under the condition of deformation

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