Corrosion inhibitor pre-filming thickness test device and method

Abstract

The invention relates to a corrosion inhibitor pre-filming thickness test device and method, and belongs to the technical field of oil and gas ground gathering. The actual in-pipe flow situation of the field is simulated, and a temperature regulating and pressure regulating system, a horizontal pipe segment test system, an elbow test system, a fluctuating pipe segment test system, a ball collection system, a ball releasing system and a corrosion inhibitor injection system are designed so as to provide means for testing the corrosion inhibitor pre-filming thickness. The film thickness monitoring piece processing work operation flow and the corrosion inhibitor pre-filming work operation flow are designed, and the corrosion inhibitor film thickness on the film thickness monitoring piece aftereach time of pre-filming is measured so as to analyze the pre-filming quality. According to the corrosion inhibitor pre-filming thickness test device and method, the influence of different ball pushgas volume, ball push pressure, different angles of elbows, pipeline fluctuation and different corrosion inhibitor injection volume, type, temperature and the matching ratio of the corrosion inhibitorto the diesel oil and other factors on the corrosion inhibitor pre-filming thickness can be analyzed through the circular test so that the pre-filming work process can be preferably selected and thepre-filming quality can be assessed.

Description

technical field [0001] The invention relates to a corrosion inhibitor pre-film thickness testing device and method, belonging to the technical field of oil and gas ground gathering and transportation. Background technique [0002] High-sulfur gas fields adopt wet gas gathering and transportation technology, which may face the risk of internal corrosion, causing damage to pipelines and equipment, and reducing the service life of equipment and pipelines. Currently, effective anti-corrosion methods include: choosing anti-hydrogen sulfide materials and adding corrosion inhibitors , corrosion inhibitor pre-coating, inner coating, etc., among which the corrosion inhibitor pre-coating operation is carried out regularly, and the anti-corrosion effect is good. [0003] The thickness of the corrosion inhibitor pre-film directly affects the anti-corrosion effect. Many factors on site will affect the thickness of the corrosion inhibitor pre-film, including: the cleanliness of the inner ...

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Problems solved by technology

[0006] The present invention mainly solves the following problems: 1. Design the processing operation flow of the film thickness detection sheet, and analyze the thickness of the pre-film by studying the distribution of the corrosion inhibitor on the film thickness detection sheet after each pre-film; Membrane operation process, standardize the loop test operation process, and ensure the safety and accuracy of the test; 3. Design the temperature and pressure regulation system, horizontal pipe section test system, elbow test system, undulating pipe section test system, and corrosion inhibitor filling system. Loop test to study the influence of corrosion inhibitor filling amount, concentration, type, temperature, push ball air volume, elbows at different angles, pipeline undulation and other factors on the pre-film thickness of corrosion inhibitor; 4. Propose a processing method for film thickness detection sheet , by copper sulfate solution immersion method and dichloromethane solution cleaning method to analyze the pre-film effect

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