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Non-digging and integral repairing method for underground pipeline

A technology for underground pipelines and repair methods, applied to pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve problems such as time-consuming, labor-intensive and costly, and achieve the effects of short construction period, fast construction speed, and easy flanging

Inactive Publication Date: 2005-01-12
大庆油田建设集团
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the time-consuming, labor-intensive and high-cost deficiencies of the existing pipeline repair methods, the present invention provides an integral repair method for underground pipelines without excavation, which has the characteristics of time-saving, labor-saving and low-cost

Method used

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  • Non-digging and integral repairing method for underground pipeline

Examples

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Effect test

Embodiment 1

[0019] Embodiment 1, the length of the pipeline to be repaired is 12m, and the inner diameter of the pipeline is 62mm. First, the pipeline is cleaned, and a stainless steel strip with a thickness of 0.2mm and a width of 62πmm is welded into a stainless steel pipe with an argon arc welding seam machine on site; the stainless steel pipe is pressed into a cross section It is a "heart"-shaped tube; one end of the stainless steel tube is flattened and folded back, and a soft steel wire rope slightly longer than the pipe is passed through the folded back, that is, the soft steel wire rope is connected to the stainless steel tube, and the other end of the soft steel rope is connected to the rubber applicator (i.e. pig ) connection, use a blower to transport the rubber applicator (i.e. pig) from one end of the pipe to the other end, that is, bring the soft steel wire rope from one end of the pipe to the other end; pull the soft steel wire rope to put the stainless steel pipe into the pi...

Embodiment 2

[0020] Embodiment 2, the pipeline that needs to be repaired is 300m, and the internal diameter is 120mm. First, the pipeline is cleaned, and the stainless steel strip with a thickness of 0.6mm and a width of 120πmm is welded into a stainless steel pipe with a high-frequency welder on the spot; ”-shaped tube; flatten one end of the stainless steel tube and fold it back, and pass a soft steel wire slightly longer than the pipe through the folded back, that is, the soft steel wire is connected to the stainless steel tube, and the other end of the soft steel wire is connected to the rubber applicator (pig). Use a blower to transport the rubber applicator (i.e. pig) from one end of the pipeline to the other, that is, bring the soft steel wire rope from one end of the pipeline to the other; pull the soft steel rope to put the stainless steel pipe into the pipeline, and seal the two ends of the pipeline , use a pump to pump water into the pipeline, and the water pressure is 10Mpa to r...

Embodiment 3

[0021] Embodiment 3, the pipeline that needs to be repaired is 800m, and the inner diameter is 120mm. First, the pipeline is cleaned, and a stainless steel strip with a thickness of 1 mm and a width of 120πmm is welded into a stainless steel pipe with a high-frequency welder on the spot; the stainless steel pipe is pressed into a cross section of "heart". ”-shaped tube; flatten one end of the stainless steel tube and fold it back, and pass a soft steel wire slightly longer than the pipe through the folded back, that is, the soft steel wire is connected to the stainless steel tube, and the other end of the soft steel wire is connected to the rubber applicator (pig). Use a blower to transport the rubber applicator (i.e. pig) from one end of the pipeline to the other, that is, bring the soft steel wire rope from one end of the pipeline to the other; pull the soft steel rope to put the stainless steel pipe into the pipeline, and seal the two ends of the pipeline , use a pump to pum...

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Abstract

The present invention is integal no-excavation pipeline repairing method. The method includes the following steps: in-situ argon arc welding stainless steel belt of 0.2-1 mm thickness into single-seam stainless steel pipe in the outer diameter equal to the inner diameter of the pipeline to be repaired; pressing the stainless steel pipe into pipe of heart-shaped cross section; connecting one end of the stainless steel pipe with soft steel cable and the other end to one rubber obliterator; transmitting the rubber obliterator with a pressure fan from one end of the pipeline to the other end; drawing the stainless steel pipe into the pipeline and blocking two ends of the pipeline; and introducing pressured water to expand the heart-shaped completely.

Description

Technical field: [0001] The invention relates to a method for repairing a pipeline, which belongs to a method for integrally repairing an underground pipeline without excavation. Background technique: [0002] Tens of thousands of kilometers of various underground pipelines are laid every year in oil fields and urban construction, which are used for the input and output of gases, liquids and other media, and play an important role in oil fields and urban construction. During the long-term use of the pipeline, due to the influence of various factors such as water quality, geology, and medium, the pipe wall will be severely corroded and perforated after a certain period of time, resulting in medium leakage, which not only affects the normal production, but also poses safety hazards . The current pipeline repair method is mainly to excavate the ground for partial repair, dig an operation well outside the pipeline, and use the two ends of the stainless steel lining pipe to weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/163
Inventor 樊三新
Owner 大庆油田建设集团
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