A multifunctional automatic simulation test device for top corrosion of wet gas pipeline

Abstract

The invention discloses a multifunctional wet gas pipeline top corrosion automatic simulation test device, which is composed of a test loop system, a control and display system, and the test loop system includes: a gas cylinder, a deposition tank, an electric heater, a fixed pipe, a flexible Composite tubes, test tubes, electrodes, temperature probes, pressure probes, etc. The test tubes are rectangular square tubes, with gas injection ports and multiple reference electrode installation holes reserved on the bottom surface, and liquid injection ports and exhaust gas ports reserved on the top surface. There are multiple sample mounting holes, multiple working electrode mounting holes and probe mounting holes, auxiliary electrode mounting holes are reserved on the side, and the two ends of the test tube are respectively connected to a flexible composite tube through flanges. The benefit of the present invention is that the device can not only reflect the corrosion situation of the top of the wet gas pipeline laid at 0-90° in the oil and gas development process, but also evaluate the effectiveness of the corrosion inhibitor under this working condition and the effect of the corrosion inhibitor on the The corrosion reduction effect of the partially damaged part of the coating.

Description

technical field [0001] The invention relates to a test device, in particular to a multifunctional wet gas pipeline top corrosion automatic simulation test device, which belongs to the technical field of oil and gas field development. Background technique [0002] With the extension of the oil and gas well's mining life, the water content in the produced fluid increases year by year, which in turn increases the erosion of metal pipes. [0003] In recent years, in order to further enhance oil recovery, water injection or CO 2 -The method of alternate injection of water to recover crude oil will reduce CO in coal chemical industry and hydrogen production industry in the future 2 At the same time of efflux, it can also increase CO 2 The swept area of ​​flooding will increase the oil recovery rate, but this will further increase the water content and CO in the produced fluid. 2 content. At the same time, the fluids produced in the process of oil and gas development usually co...

AI Technical Summary

Problems solved by technology

At present, the understanding of top corrosion is not sufficient. Conventional corrosion inhibitors are difficult to effectively protect the top. The problem of pipe top corrosion is becoming more and more serious, especially pitting corrosion. The corrosion rate of the wedge-shaped pits on the top of the pipe is even as high as 5mm / a

In addition, although some pipes are coated with coatings, they are partially damaged due to some reasons, forming a "big cathode-small anode", which further aggravates pitting corrosion

Pitting corrosion is difficult to monitor and predict, and the risks and hazards caused by it are huge

Once the oil pipe is perforated, it will not only reduce the oil and gas production capacity, shorten the pipeline replacement cycle, increase the maintenance cost, and most importantly, it will also cause safety hazards to the field personnel in the oil and gas field, and the leaked oil and gas will also pollute the gas, soil and water , causing environmental risks

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