Assembly and operation method for onsite repair of composite pipeline

A technology of composite pipes and composite pipes, which is applied in the field of on-site repair components of composite pipes, can solve problems such as secondary leakage and failure, and achieve the effect of improving construction efficiency and saving precious time

Inactive Publication Date: 2019-03-12
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can alleviate the leakage for a short time, but because the leakage channel is completely blocked, it will cause secondary leakage failure when it is subjected to high-pressure transportation

Method used

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  • Assembly and operation method for onsite repair of composite pipeline
  • Assembly and operation method for onsite repair of composite pipeline
  • Assembly and operation method for onsite repair of composite pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] On-site repair of reinforced thermoplastic composite pipe (DN100PN4MPa) with 10cm axial crack in the pipeline

[0040] Step 1: Select components, among which the length of the connecting nipple 6 is 50cm, and the conversion nipple 10 is DN80 to DN100; take the pipe crack as the center, and measure the length as 90cm (50cm is the length of the connecting nipple, and 40cm is 2 conversion pup lengths) damaged part of the pipe body and sawed. Grind the ends of the two pipelines to be repaired to keep them flush and flat.

[0041] Step 2: Use joint crimping equipment to crimp and connect the inner core tube and the outer tube to the end face of the pipe.

[0042] Step 3: Place the elastomer sealing ring on the outer end surface of the DN100 thread of the component conversion nipple, and screw the DN100 connector of the conversion nipple to the connecting sleeve through threads.

[0043] Step 4: Connect the repair pup joint to the conversion pup joint through threads, and t...

example 2

[0046] On-site repair of reinforced thermoplastic composite pipe (DN80PN6MPa) with 20cm axial crack at the pipeline bend (minimum bending radius is 2m)

[0047]Step 1: Select components, among which the length of the connecting nipple 6 is selected to be 200cm, and the conversion nipple 10 is selected to be DN80 to DN80; taking the pipe crack as the center, the measured length is 240cm (200cm is the length of the connecting nipple, and 40cm is 2 conversion pup lengths) damaged part of the pipe body and sawed. Grind the ends of the two pipelines to be repaired to keep them flush and flat.

[0048] Step 2: Use joint crimping equipment to crimp and connect the inner core tube and the outer tube to the end face of the pipe.

[0049] Step 3: Adjust the position of the pipeline to be repaired and the connecting sub to ensure that both ends are coaxial, and the bending radius of the pipeline to be repaired and the connecting sub of the component is greater than the minimum bending r...

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Abstract

The invention provides an assembly and an operation method for onsite repair of a composite pipeline. The assembly for onsite repair of the composite pipeline comprises a connection structure, a repair short section and a switching short section. One end of the switching short section is connected with the connection structure, and the other end of the switching short section is connected with therepair short section. The connection structure comprises a connection sleeve, a connection short section, an inner core pipe and an outer casing pipe. The connection short section is hollow-cylindric, and one end of the connection short section and the connection short section are coaxially and fixedly provided with the outer casing pipe. The inner core pipe is fixedly arranged on the portion, onthe inner side of the outer casing pipe, of the connection short section. The inner core pipe and the outer casing pipe are coaxially arranged. An annular connection cavity is formed between the inner core pipe and the outer casing pipe. One end of the composite pipe is clamped in the annular connection cavity. The connection sleeve is arranged at other end of the connection short section in a sleeving manner. The connection structure and the repair short section are of the same structure. According to the assembly and the operation method for onsite repair of the composite pipeline, when repair of the enhanced thermoplastic plastic composite pipe is conducted, manufacture of joints of a to-be-repaired pipeline, connection between joints of the to-be-repaired pipeline and the switching short section and connection between the switching short section and the connection short section can be completed rapidly; precious time is saved for onsite repair; and construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of pipeline repair, and in particular relates to an assembly and an operation method for on-site repair of a composite pipeline. Background technique [0002] In order to alleviate the oil field corrosion problem, the non-metallic pipe composite road, as an effective way to solve the corrosion problem of the ground gathering pipeline network, has been more and more widely used in some new projects and reconstruction and expansion projects. Reinforced thermoplastic composite pipe not only has the characteristics of traditional non-metallic pipes such as corrosion resistance and small conveying resistance, but also has the characteristics of good flexibility, a single length of up to hundreds of meters, fewer joints and quick installation. A typical non-metallic composite pipe product structure is three layers, namely inner lining layer, reinforcement layer and outer protective layer. Among them, the innermos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/18F16L55/16
CPCF16L55/16F16L55/18
Inventor 齐国权戚东涛马秋荣李厚补丁楠张冬娜魏斌邵晓东蔡雪华
Owner BC P INC CHINA NAT PETROLEUM CORP
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