Device for evaluating corrosion resistance of petroleum pipe in oil-water coupling medium

Abstract

The invention provides a device for evaluating corrosion resistance of a petroleum pipe in an oil-water coupling medium. The device comprises a high-temperature and high-pressure kettle, a rotating cylinder, an oil guide funnel, a connecting rod, a motor, an oil storage tank and an oil tank base. The oil tank base is installed at the bottom in the high-temperature and high-pressure kettle, the bottom of the oil storage tank is installed on the oil tank base, the interior of the oil tank base is a hollow structure, the bottom and the top of the oil storage tank are open, and the bottom of the oil storage tank is connected with the hollow structure in the oil tank base. An oil outlet is formed in the oil tank base, the bottom and the top of a rotating cylinder are open, and the oil guide funnel is arranged in the top of the rotating cylinder. When in use, the rotating cylinder sleeves the oil storage tank, and the top of the rotating cylinder is connected with the output end of the motoroutside the high-temperature and high-pressure kettle through the connecting rod.

Description

technical field [0001] The invention belongs to the technical field of corrosion evaluation of oil pipes, in particular to a test device for evaluating the corrosion resistance of oil pipes in an oil-water coupling medium. Background technique [0002] In the field of oil and gas development, petroleum pipes are faced with complex working conditions of multi-phase coupling of gas, water, oil and solid coexistence, high temperature, high pressure and high corrosion medium. Among them, due to the adsorption of crude oil on the surface of oil pipes, the potential difference between the crude oil adsorption area and the non-adsorption area will be caused, thereby causing galvanic corrosion. In addition, the oil pipe coating material causes swelling, which reduces the protective performance of the coating and affects the service life of the oil pipe. For this reason, scientific research and technical personnel have conducted a lot of research on the damage mechanism and preventi...

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Problems solved by technology

[0004] However, the above devices only consider temperature, pressure, chloride ion, dissolved oxygen, H 2 S and CO 2 Influence of corrosive media and other corrosive media on the properties of oil pipes under different working conditions

None of the above devices can evaluate the corrosion resistance of oil pipes and oil pipe anticorrosion coatings in oil-water coupling media

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