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Novel crossing pipeline outer layer material and preparation method

An outer layer material and pipeline technology, which is applied in the field of new-type pipeline outer layer materials and preparation, can solve the problems of harsh use conditions of protective materials, and achieve the effects of reducing shielding effect, improving bonding performance, and reducing processes.

Inactive Publication Date: 2012-06-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conditions for the use of protective materials in the crossing section of oil pipelines are more stringent. They must not only be wear-resistant, but also be resistant to scratches from rocks. In addition, the outer protective layer of the crossing pipe also involves the bonding problem with the underlying material.

Method used

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  • Novel crossing pipeline outer layer material and preparation method

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Comparison scheme
Effect test

Embodiment 1

[0023] 100 parts of polymer matrix: linear low density polyethylene, 5 parts of reinforcing particles: modified carbon nanotubes, 6 parts of lubricating particles: graphite, 2 parts of polar filler: silica modified by coupling agent KH560, 3 parts Small molecule monomer: maleic anhydride, 0.3 parts of initiator: dicumyl peroxide, added into a single-screw extruder, extruded and granulated at 170° C., and the modified polymer composite material was prepared.

Embodiment 2

[0025] 100 parts of polymer matrix: polypropylene, 1 part of reinforcing particles: carbon fiber, 5 parts of lubricating particles: molybdenum disulfide, 5 parts of polar filler: cetyltrimethylammonium bromide modified silica, 5 parts 1 part of small molecular monomer: acrylic acid, 0.5 part of initiator: di-tert-butyl peroxide, added to the internal mixer, mixed at 190°C, crushed and granulated, and the modified polymer composite material was prepared.

Embodiment 3

[0027] Take 100 parts of polymer matrix: nylon 11, 10 parts of reinforcing particles: modified carbon nanotubes, 10 parts of lubricating particles: tungsten disulfide, 1 part of polar filler: silicon dioxide, 0.1 part of small molecular monomer: maleic anhydride , 0.1 part of initiator: dicumyl peroxide, 0.5 part of antioxidant: 1098, added into a twin-screw extruder, extruded and granulated at 210 ° C to prepare a modified polymer composite material.

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Abstract

The invention relates to a novel crossing pipeline outer layer material and a preparation method. The material is used for replacing the outermost polyolefin material in the traditional 3PE (Polyethylene) structure. The material has higher intensity and good lubrication performance while ensuring anti-corrosion performance. The scratch resistant performance of the material can be effectively increased. A crossing protective layer is unnecessary to be additionally increased. Due to a certain polarity, the material is capable of increasing bonding performances of a bottom layer material and a stuffing material and reducing a shielding action on cathodic protection current. Compared with the traditional a fritting epoxy coating, the material has better toughness, and the coating is difficult to fall off.

Description

technical field [0001] The invention relates to a material and a preparation method for the outer layer of the pipeline, which is used to replace the outermost polyolefin material in the traditional 3PE structure, so as to ensure the anti-corrosion performance and improve the anti-scratch ability. Background technique [0002] Due to the limitation of geological conditions, oil and gas pipelines often have to cross horizontally oriented (HDD) rock layers, which requires that the outer protective material of the pipeline not only has excellent anti-corrosion ability, but also has good rock scratch resistance. At present, in the anti-corrosion coating with 3PE structure widely used, the outermost layer material is polyethylene or polypropylene material. These materials have low strength and are easy to be scratched in the process of passing through, resulting in a decline in anti-corrosion performance. It is necessary to increase the outer protective layer in the traversing se...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L77/02C08L77/06C08L67/00C08L27/18C08L61/16C08K13/06C08K9/06C08K3/36C08K9/00C08K7/00C08K3/04C08K9/04C08K7/06C08K3/30C08K3/34C08K3/22
Inventor 孟晓宇丛川波秦瑞红董玉华周琼
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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