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Anticorrosion waxing-preventive composite pipe and manufacturing method thereof

A composite pipeline and anti-wax technology, which is applied in the direction of pipeline anticorrosion/rust protection, pipeline protection, chemical instruments and methods, etc., can solve the problem that oil production pipelines cannot have both wax anti-wax effect and anti-corrosion performance at the same time, and achieve good chemical performance. Stability, reduced free energy and roughness, reduced deposition effects

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the defect that the existing oil production pipelines cannot have both the wax-proof effect and the anti-corrosion performance at the same time, and provide a kind of anti-corrosion and anti-wax composite pipeline which can have both excellent wax-proof effects and anti-corrosion properties and A kind of preparation method of anti-corrosion and anti-wax composite pipeline

Method used

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  • Anticorrosion waxing-preventive composite pipe and manufacturing method thereof

Examples

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preparation example Construction

[0025] The preparation method of the anti-corrosion and wax-proof composite pipe provided by the present invention includes forming a polyvinylidene fluoride layer 2 on the inner wall of the pipe body 1.

[0026] According to the present invention, the method of forming the polyvinylidene fluoride layer 2 can be performed by various existing methods. For example, polyvinylidene fluoride can be dissolved in a diluent to prepare a slurry, and then the slurry can be coated Cover the inner wall of the pipe body 1, and then remove the diluent in the slurry. Wherein, the coating method is well known to those skilled in the art, for example, brush coating, curtain coating, spray coating, etc. can be used. In addition, the method for forming the polyvinylidene fluoride layer 2 can also be to first prepare polyvinylidene fluoride into a polyvinylidene fluoride film, and then heat-press the obtained polyvinylidene fluoride film on the inner wall of the tube body 1 to A polyvinylidene fluo...

Embodiment 1

[0038] This embodiment is used to illustrate the anti-corrosion and wax-proof composite pipe provided by the present invention and the preparation method thereof.

[0039] First, the carbon steel pipe is pretreated with oil and rust surface to obtain a clean surface, and then the carbon steel pipe obtained by the surface pretreatment is heated to 200°C, and then a polyvinylidene fluoride film with a thickness of 52μm (wherein, polyvinylidene fluoride) The number average molecular weight of vinyl fluoride is 100,000) is wound on a calender roll and fed into the carbon steel pipe. The carbon steel pipe is slowly rotated at a speed of 3 rpm, and the polyvinylidene fluoride film is uniformly pressed to the inner tube of the carbon steel pipe at a pressure of 5 MPa On the wall, the heating is stopped after the rolling is uniform, while the carbon steel pipe continues to rotate until solidified, and an anti-corrosion and wax-proof composite pipe G1 including the pipe body 1 and the poly...

Embodiment 2

[0041] This embodiment is used to illustrate the anti-corrosion and wax-proof composite pipe provided by the present invention and the preparation method thereof.

[0042] First, the carbon steel pipe is pretreated with degreasing and rust removal in advance to obtain a clean surface, and then the carbon steel pipe obtained by the surface pretreatment is heated to 280°C, and then a polyvinylidene fluoride film with a thickness of 80μm (wherein, polyvinylidene fluoride) The number average molecular weight of vinyl fluoride is 410,000) is wound on a calender roll and fed into the carbon steel pipe. The carbon steel pipe is slowly rotated at a speed of 5 rpm, and the polyvinylidene fluoride film is uniformly pressed to the inner tube of the carbon steel pipe at a pressure of 5 MPa On the wall, the heating is stopped after the rolling is uniform, while the carbon steel pipe continues to rotate until solidified, and an anticorrosive and wax resistant composite pipe G2 including the pip...

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Abstract

The invention provides an anticorrosion wax-preventive composite pipe and a manufacturing method thereof. The anticorrosion wax-preventive composite pipe comprises a pipe body (1) and a polyvinylidene fluoride layer (2) arranged on the inner wall of the pipe body (1). The anticorrosion wax-preventive composite pipe is capable of effectively preventing waxing and reducing corrosivity.

Description

Technical field [0001] The invention relates to an anti-corrosion and wax-proof composite pipeline and a preparation method of the anti-corrosion and wax-proof composite pipeline. Background technique [0002] The main chemical composition of wax in crude oil is n-alkane, usually C 16 H 34 -C 63 H 128 The normal alkanes are called waxes. Pure paraffin wax is slightly transparent white odorless crystals. The freezing point and wax content of crude oil in China's major oil regions are relatively high. Generally, the wax content is 15-25%, and some even reach more than 40%. In the process of production and transportation, as the temperature and pressure decrease, the dissolved paraffin in the crude oil will crystallize and precipitate. With the further decrease in temperature and pressure, the paraffin will continue to precipitate and deposit on the sucker rod of the downhole device. On the surface and the inner wall of the oil pipeline, the phenomenon of "waxing". The occurrence...

Claims

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Application Information

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IPC IPC(8): F16L58/10F16L58/16F16L9/147B32B37/06B32B37/24
CPCF16L58/1009B32B37/06B32B37/10B32B37/24F16L9/147F16L58/16
Inventor 郑俊鹏任毅马蓓蓓姚雪容罗水源
Owner CHINA PETROLEUM & CHEM CORP
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