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Flexible pipe for conveying oil gas and hydrogen and preparation method thereof

A flexible pipe and hydrogen technology, applied in the direction of chemical instruments and methods, pipes, hoses, etc., can solve the problems of glass fiber aging and brittleness, pipe strength attenuation, penetration, etc., to ensure stress bearing capacity, good strength and toughness, Simple operation effect

Inactive Publication Date: 2022-07-29
江苏正道可燃冰管道有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, a long-fiber reinforced resin matrix prepreg tape is provided in the prior art, using long fibers such as glass fibers as reinforcements, polyethylene resin or polypropylene resin as the protective matrix of the reinforcements, due to the penetration of small gas molecules , especially the composite pipe with glass fiber as filament fiber is prone to aging and brittle fracture under hot and humid conditions. With the extension of the service time of the pipe, it brings hidden dangers to the long-term safe service of the pipe
At the same time, in the prior art, rubber-reinforced steel cords are also used as composite pipe reinforcement layers, which also face the prominent problems of acid gas small molecule penetration, steel cord corrosion, and pipe strength attenuation.

Method used

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  • Flexible pipe for conveying oil gas and hydrogen and preparation method thereof
  • Flexible pipe for conveying oil gas and hydrogen and preparation method thereof
  • Flexible pipe for conveying oil gas and hydrogen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] like figure 1 As shown in the figure, it is a flexible pipe for oil and gas and hydrogen transportation. The pipe is a five-layer composite structure. From the inside to the outside, it is an inner lining layer 1, a reinforcing layer 2, an inner protective layer 3, a weight layer 4 and an outer protective layer 5, including :

[0072] An inner liner 1, the inner liner 1 includes a first polymer;

[0073] Reinforcing layer 2, the reinforcing layer 2 includes a first metal filament;

[0074] an inner protective layer 3, the inner protective layer 3 includes a second polymer;

[0075] a weighted layer 4 comprising a second metal filament; and

[0076] Outer protective layer 5, the outer protective layer 5 includes a third polymer.

[0077] Wherein: the first polymer is selected from polyethylene.

[0078] like figure 2 As shown, it is a resin-coated steel cord belt, and the first metal filament is selected from a double-layer resin-coated steel cord belt 201, compri...

Embodiment 2

[0095] The structure of the flexible pipe for oil and gas and hydrogen transportation is the same as the flexible pipe structure of Example 1, only the material selection of the first resin layer and the second resin layer of the inner lining layer and the resin-coated steel cord belt is changed, specifically: The first polymer is selected from cross-linked polyethylene; the first resin layer 22 is selected from polyvinylidene chloride; the second resin layer 23 is selected from cross-linked polyethylene;

[0096] The preparation method of the flexible pipe for oil and gas and hydrogen transportation comprises the following steps:

[0097] S1. Preparation of inner lining layer:

[0098] Add the material particles of the inner lining layer into the single-screw extruding hopper, heat the single-screw extruder, and extrude the material particles of the inner lining layer into the heating zone of the extruder. The heating zone is divided into 6 sections, and the temperature of ea...

Embodiment 3

[0108] The structure of the flexible pipe for oil and gas and hydrogen transportation is the same as the flexible pipe structure of Example 1, only the material selection of the first resin layer and the second resin layer of the inner lining layer and the resin-coated steel cord belt is changed, specifically: The first polymer is selected from polyvinylidene fluoride; the first resin layer 22 is selected from ethylene-vinyl alcohol copolymer; the second resin layer 23 is selected from polyvinylidene fluoride;

[0109] The preparation method of the flexible pipe for oil and gas and hydrogen transportation comprises the following steps:

[0110] S1. Preparation of inner lining layer:

[0111] Add the material particles of the inner lining layer into the single-screw extruding hopper, heat the single-screw extruder, and extrude the material particles of the inner lining layer into the heating zone of the extruder. The heating zone is divided into 6 sections, and the temperature ...

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Abstract

The invention discloses a flexible pipe for conveying oil gas and hydrogen, which sequentially comprises an inner lining layer, a reinforcing layer, an inner protective layer, a counterweight layer and an outer protective layer from inside to outside, and comprises the inner lining layer, the reinforcing layer, the inner protective layer, the counterweight layer and the outer protective layer, the reinforcing layer comprises a first metal filament; an inner protective layer including a second polymer; the counterweight layer comprises a second metal filament; and an outer protective layer, the outer protective layer including a third polymer. The flexible pipe is prepared from a high-temperature wear-resistant material, a gas barrier material, a buffer material, a heat-resistant hot-melt material and the like together, and has the effects of blocking and conveying a medium.

Description

technical field [0001] The invention relates to the technical field of oil and gas and hydrogen transportation, in particular to a flexible pipe for oil and gas and hydrogen transportation and a preparation method thereof. Background technique [0002] At present, coastal and shallow seas still dominate the proven reserves of global marine oil and gas. In the development of offshore oil and gas resources, submarine oil and gas pipelines are an important way to connect the internal facilities of offshore oil and gas fields and export oil and gas resources. With the development of offshore oil and gas fields, in the face of harsh marine service environments such as waves, currents, and erosion, better quality requirements are put forward for submarine pipelines than land pipelines, such as strain resistance and acid medium corrosion resistance. At the same time, the service of submarine oil and gas pipelines generally exceeds 20 years, and the design requires maintenance-free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08F16L11/12B32B27/30B32B27/34B32B27/28B32B1/08B29D23/18B29L23/18
CPCF16L11/082F16L11/12B29D23/18B32B27/30B32B27/304B32B27/34B32B27/308B32B27/281B32B27/28B32B27/285B32B1/08B29L2023/18B32B2327/12B32B2260/021B32B2260/046B32B2371/00
Inventor 陈江华李子轩顾恺姜雪林豪赵绍东朱原原
Owner 江苏正道可燃冰管道有限公司
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