Forming device for gas production pipeline corrosion inhibitor slug pre-film

Abstract

The invention discloses a forming device for a gas production pipeline corrosion inhibitor slug pre-film. The forming device comprises an injecting pump and a corrosion inhibitor storage tank, wherein an outlet of the injecting pump is communicated with an inlet of the corrosion inhibitor storage tank, an outlet pipeline of the corrosion inhibitor storage tank is provided with a valve and a pressure transmitter, the corrosion inhibitor storage tank is provided with a pressure gage, the pressure transmitter is communicated with a pressure regulating valve through a pipeline a, the pressure regulating valve is communicated with the corrosion inhibitor storage tank through a pipeline b, the pipeline b is communicated with a pipeline c, and the pipeline c is provided with a valve. According a method in the invention, through controlling of pressure difference at two ends of a corrosion inhibitor slug, the running speed of gas is controlled so as to allow the corrosion inhibitor to form slug flow in the pipelines, thereby realizing corrosion inhibitor pre-filming for the pipelines; the method has the advantages of a simple process, convenient operation and low cost for investment of capital construction and for operation management.

Description

technical field [0001] The invention relates to a gas production pipeline corrosion inhibitor slug pre-film forming device, which belongs to the technical field of petroleum and natural gas engineering. Background technique [0002] H is generally contained in the produced gas of oil and gas fields 2 S, CO 2 And other corrosive gases, coupled with the precipitation of free water during the transportation process, the transportation medium is mostly in the gas-liquid two-phase flow pattern, which often causes serious corrosion damage to pipeline facilities. At present, domestic and foreign countries have achieved certain application effects in anti-corrosion by adopting technologies such as intrinsically safe design, selection of corrosion-resistant materials, anodic or cathodic protection, and internal and external coatings. Compared with other anti-corrosion methods, corrosion inhibitors are widely used in petroleum, chemical, mechanical and other fields due to their char...

AI Technical Summary

Problems solved by technology

For gas fields with a large number of single wells, in order to reduce investment costs, receiving and receiving ball devices are often only installed at gas gathering stations, while gas production pipelines have small diameters and short distances, and single well stations generally do not have receiving and receiving balls And the pigging valve, it is impossible to use the pigging process to pre-coat the pipeline with corrosion inhibitor

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