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Method for repairing damaged glass fiber reinforced plastic pipeline

A repair method and technology for pipeline repair, applied in the direction of pipe components, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve the problems of difficult maintenance and large pressure on the surface of the pipeline, and achieve good pressure bearing effect and application performance. Strong, pressure-bearing effect with excellent effect

Inactive Publication Date: 2021-01-29
郑州新锐石油工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] FRP pipe is a new type of composite material pipe. It is mainly made of glass fiber yarn as a reinforcing material and resin as a matrix. Compared with other pipes such as metal pipes, FRP pipe has excellent corrosion resistance. It is used in oilfield water injection pipelines and High-salt and high-acid medium pipelines are gradually being applied. With the increasing use of glass steel pipes in oil field construction, the phenomenon of damage is also increasing. There is no mature and unified process for timely and rapid repair of damaged glass steel pipes, especially After the high-pressure FRP pipe is damaged, the situation is different. The surface of the FRP pipe is subjected to a lot of force and pressure, and the maintenance is extremely difficult, which has become a bottleneck restricting the wide application of FRP pipes.

Method used

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  • Method for repairing damaged glass fiber reinforced plastic pipeline

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Experimental program
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Effect test

Embodiment 1

[0024] A method for repairing damaged glass fiber reinforced plastic pipes, specifically comprising the following steps:

[0025] S1: Understand the diameter of the damaged FRP pipe section, the pressure and temperature of the medium, and select prefabricated joints and adhesives. The applicable pressure range of this repair method for the damaged section of FRP pipeline is: ≤25MPa; the applicable temperature range of this repair method for the damaged section of FRP pipeline is: ≤100°C; the trial medium of this repair method for the damaged section of FRP pipeline is: oil, Water, crude oil, natural gas, weak acid, weak base.

[0026] S2: Clean up impurities on the outer surface of the damaged section of the FRP pipe, and roughen the section where the FRP pipe is connected to the connector. The specific methods for cleaning the impurities on the outer surface of the damaged FRP pipe section are as follows: a. For the removal of impurities and oxides: use sandpaper, wire brush...

Embodiment 2

[0035] A method for repairing damaged glass fiber reinforced plastic pipes, specifically comprising the following steps:

[0036] S1: Understand the diameter of the damaged FRP pipe section, the pressure of the medium, and the temperature, etc., and select the prefabricated joint and adhesive; S2: Clean up the impurities on the outer surface of the damaged FRP pipe section, and roughen the pipe section that connects the FRP pipe to the joint. Surface treatment; S3: prepare joint adhesive according to the formula. The model of the joint adhesive used is XR-091. To prepare 100kg of XR-091 joint adhesive, the required formula components are as follows in parts by weight: E51 epoxy resin 41kg, diphenylamine 1.3kg, acid-washed asbestos 6.7kg , boron trioxide 35.5kg, acid-washed asbestos 15.5kg; S4: glue coating: the adhesive prepared in step S3 is evenly coated on the pipe section that is roughened in step S2; S5: continuous operation, after coating is completed , insert the pipe ...

Embodiment 3

[0038] A method for repairing damaged glass fiber reinforced plastic pipes, specifically comprising the following steps:

[0039] S1: Understand the diameter of the damaged FRP pipe section, the pressure of the medium, and the temperature, etc., and select the prefabricated joint and adhesive; S2: Clean up the impurities on the outer surface of the damaged FRP pipe section, and roughen the pipe section that connects the FRP pipe to the joint. Surface treatment; S3: prepare joint adhesive according to the formula. The model of the joint adhesive used is XR-091. To prepare 100kg of XR-091 joint adhesive, the required formula components are as follows in parts by weight: E51 epoxy resin 41.1kg, diphenylamine 1.4kg, pickling asbestos 7kg , boron trioxide 35kg, acid-washed asbestos 15kg; S4: Glue coating: evenly coat the adhesive prepared in step S3 on the pipe section subjected to rough surface treatment in step S2. In order to prevent air from forming bubbles or pores in the adh...

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Abstract

The invention discloses a method for repairing a damaged glass fiber reinforced plastic pipeline. The method comprises the following steps of: firstly, knowing the related condition of a damaged pipesection, and selecting an applicable prefabricated connector and an adhesive variety; cleaning impurities on the outer surface of a connector pipe section, and performing rough surface treatment; preparing an adhesive; gluing; airing; selecting a corresponding pipeline repairing connector according to the pipe diameter size of the connector glass fiber reinforced plastic pipeline; performing connector operation; and welding the pipeline connector, and replacing the pipeline section. According to the method for repairing the damaged glass fiber reinforced plastic pipeline, the connector is repaired by prefabricating the glass fiber reinforced plastic pipeline, and the damaged glass fiber reinforced plastic pipeline is replaced by utilizing the professional adhesive for bonding and sealing.The method is extremely high in field application performance, has the technical characteristics of rapidness, high efficiency, safety and environment friendliness, is extremely good in pressure bearing effect, and is an excellent scheme for repairing the damaged high-pressure water injection glass fiber reinforced plastic pipeline. Moreover, the method is wide in application range, the damaged glass fiber reinforced plastic pipeline can be rapidly repaired, and the method can be effectively used for repairing the damaged high-pressure water injection glass fiber reinforced plastic pipeline.

Description

technical field [0001] The invention belongs to the technical field of pipeline repair, and in particular relates to a repair method for damaged glass fiber reinforced plastic pipelines. Background technique [0002] FRP pipes are made of unsaturated polyester resin, glass fiber, and stone sand, which are wound or centrifugally cast and solidified. FRP pipes are characterized by their unique strong corrosion resistance, smooth inner surface, low energy consumption, Long service life (more than 50 years), convenient transportation and installation, no maintenance and low overall cost and many other advantages have been widely used in petroleum, thermal power, chemical industry, papermaking, urban water supply and drainage, factory sewage treatment, seawater desalination, gas transmission and other industries. Applications. [0003] According to the different types of resin used, it is divided into polyester FRP, phenolic FRP, epoxy FRP, etc. Although glass products are fragi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/168F16L55/175
CPCF16L55/168F16L55/175
Inventor 胜瑞兴冯松林方刚师涛何昊魏海峰姚惠敏董立超王泽东
Owner 郑州新锐石油工程技术有限公司