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A combined cleaning method for waste oil and gas pipeline residues

A technology of oil and gas pipelines and cleaning methods, which is applied in the field of combined cleaning of waste oil and gas pipeline residues, can solve the problems that cannot fully meet the needs of waste pipeline treatment, and achieve good cleaning effects, strong adaptability, and avoid jamming effects

Active Publication Date: 2017-01-11
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different demand conditions, conventional pigging techniques for in-service pipelines cannot fully meet the needs of abandoned pipelines

Method used

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  • A combined cleaning method for waste oil and gas pipeline residues
  • A combined cleaning method for waste oil and gas pipeline residues

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a combined cleaning method for waste oil and gas pipeline residues, such as figure 1 shown, including:

[0045] Step S101: Implanting a pigging train into the abandoned oil and gas pipeline, the pigging train consists of at least two-way straight plate pigs, foam pigs, organic solvents, water-based cleaning agents and other different types of pigs and The composition of the cleaning agent;

[0046]Step S102: Passing a propelling medium into the abandoned oil and gas pipeline to push the pigging train to run in the abandoned oil and gas pipeline, thereby cleaning the abandoned oil and gas pipeline.

[0047] Such as figure 2 As shown, the figure shows the placement of pigging trains and chemical cleaning agents for residue cleaning in the undulating long-distance oil and gas pipeline, as well as the location and structure of the residue concentration sampling port. When the residue is cleaned, the pigging train running inside the abandoned lon...

Embodiment 2

[0052] The present embodiment focuses on the residue cleaning of product oil pipelines and gas pipelines. Water-soluble cleaning agent 9 selects 8% sulfonic acid, 16% fatty alcohol polyoxyethylene ether sodium sulfate, 10% coconut oil alkyl diethanolamide, and A mixed water-based cleaning agent composed of an appropriate amount of antistatic agent and water; the organic solvent 10 uses a special rust remover to dissolve the iron oxide in the pipeline; the two-way straight pipe pig 2 and the two-way straight pipe pig 5 are commonly used commercial cleaners The pipe cleaner has a positioning function, and the interference is 3% to 5% of the inner diameter of the pipeline; the foam pig 3 and the foam pig 4 adopt two-way anti-tear foam pipe pigs, and the interference is 4% to 8% of the inner diameter of the pipeline %.

[0053] When cleaning pipeline residues, use the pig transceiver device between stations as much as possible to avoid the operation of installing temporary pig tra...

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Abstract

The invention discloses a combined cleaning method of waste oil and gas pipeline residues. The method comprises the following steps: implanting a pipe cleaning train in a waste oil and gas pipeline, wherein the pipe cleaning train at least comprises various different types of pipe cleaners and cleaning agents such as bidirectional straight plate pipe cleaners, foam pipe cleaners, an organic solvent and a water-base cleaning agent; introducing a push medium into the waste oil and gas pipeline to push the pipe cleaning train to operate in the waste oil and gas pipeline so as to clean the waste oil and gas pipeline.

Description

technical field [0001] The invention relates to the technical field of oil and gas storage and transportation, in particular to a combined cleaning method for waste oil and gas pipeline residues. Background technique [0002] Abandonment of oil and gas pipelines is an important link in the life cycle management of pipelines. When the service life of pipelines reaches the upper limit or the benefits of continuing to transport oil and gas are far lower than the transportation costs and the pipelines have no other potential uses, abandonment is an inevitable choice. Since the construction of the first crude oil pipeline in my country in 1958, the development of oil and gas pipelines has been booming. By the end of the "Twelfth Five-Year Plan", my country's onshore oil and gas pipelines will reach 100,000 kilometers. However, due to the limitations of the metallurgy, pipe making, on-site construction welding and testing capabilities of the old pipelines in service in my country,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/053C11D1/83
CPCB08B3/08B08B9/055B08B9/057B08B13/00B08B2209/0553C11D1/83
Inventor 康叶伟左莉姚志强郭正虹卢启春陈新华王洪涛徐华天陈洪源王禹钦林明春
Owner PIPECHINA SOUTH CHINA CO