Oil and gas pipeline injection drying pipe cleaner

Abstract

The invention provides an oil and gas pipeline injection drying pipe cleaner. The oil and gas pipeline injection drying pipe cleaner comprises a pipe cleaner cylindrical shell, an inlet gas control valve mounted in the middle of the pipe cleaner cylindrical shell, supporting leather cups fixed to the sidewall of the pipe cleaner cylindrical shell, a laval spray pipe connected with an internal thread of the pipe cleaner cylindrical shell and a venturi pipe connected with an external thread of the pipe cleaner cylindrical shell. Compared with the prior art, the oil and gas pipeline injection drying pipe cleaner has the advantages that no moving component is arranged in the oil and gas pipeline injection drying pipe cleaner; and the oil and gas pipeline injection drying pipe cleaner is simplein structure, can dry a pipeline by moving in the pipeline and improves the drying efficiency.

Description

technical field [0001] The invention relates to the field of oil and gas pipelines, in particular to an injection drying pig for oil and gas pipelines. Background technique [0002] The general procedure for commissioning oil and gas pipelines is: pressure test→water removal→drying→replacement→commissioning. [0003] Pipeline pressure testing includes strength test and tightness test. Due to the high compressibility of gas, in the case of cracks in the pipeline, it may lead to crack instability or even explosion, so there is a greater risk in using gas pressure test. National regulations generally recommend water as the pressure test medium. After the oil and gas pipeline is tested with water, although the water stored in the pipeline can be swept out after line sweeping, it is still difficult to remove the accumulated water in low-lying areas and the water film attached to the pipeline wall, and the pipeline will also contain a large amount of saturated water vapor. Resi...

AI Technical Summary

Problems solved by technology

[0004] 1) Cause corrosion inside the pipeline and auxiliary equipment;

[0005] 2) Cause hydrate blockage, and ice blockage will be formed at low temperature, which will affect the safe operation of the pipeline;

[0006] 3) Reduce the oil and gas transmission capacity and gas supply quality, affecting the normal use of users

[0012] Compared with these three types of methods, the desiccant drying method needs to consume a large amount of desiccant, the cost is high, and it has been eliminated at present; the vacuum drying method has a small scope of application and is only suitable for submarine pipelines and large-diameter pipelines; while the flowing gas evaporation method Low efficiency and long time

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