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Coating for inner wall of oil field pipeline and preparation method thereof

A pipeline and oilfield technology, which is applied in the field of oilfield pipeline inner wall coating and its preparation, can solve problems such as casing corrosion, reduced oil recovery, and oil pipe corrosion, and achieve the effects of reduced flow resistance, superior water resistance, and low surface energy

Active Publication Date: 2012-03-28
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, tubing and casing corrosion is common in water injection production wells, and tubing corrosion or scaling will bring great difficulties to the layered water injection process, reduce oil recovery and cause huge economic losses
However, the efficacy of most pipeline coatings currently only focuses on the anti-corrosion and anti-rust performance of the coating film, and does not pay attention to the hydrophobicity of the coating film. Moreover, the drying speed of the existing coating film is not only relatively slow but also affected by the surrounding environment. influences
This has caused many difficulties in the development of oil fields and affected the development of energy

Method used

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  • Coating for inner wall of oil field pipeline and preparation method thereof
  • Coating for inner wall of oil field pipeline and preparation method thereof
  • Coating for inner wall of oil field pipeline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 prepares color paste

[0034] (1) Formula

[0035] ① See Table 1 for the specific formula of epoxy resin color paste.

[0036] Table 1

[0037]

[0038]

[0039] Note: The solvent in Table 1 is a mixed solvent of cyclohexanone and xylene with a volume ratio of 1:1.

[0040] ②See Table 2 for the specific formula of fluororesin color paste.

[0041] Table 2

[0042]

[0043] Note: The film-forming resin LF200 in Table 2 is a chlorotrifluoroethylene-vinyl ether fluorine resin produced by Asahi Glass Co., Ltd. of Japan, and its brand is Lumiflon 200, LF200 for short;

[0044] (2) Specific operation

[0045] Prepare raw materials according to the formula quantity in Table 1 and Table 2, add film-forming resin, dispersing aid, solvent, and pigment into the dispersion tank in sequence, stir with a high-speed dispersing mixer for 10-15 minutes, and then grind and disperse to fineness with a sand mill <30 microns, the white, yellow, red and black colo...

Embodiment 2

[0046] Embodiment 2 prepares 1#~3# first component

[0047] (1) The formula is shown in Table 3.

[0048] table 3

[0049]

[0050] Note: The fluorine-containing silane additives in Table 3 are G502 (dodecafluoroheptylpropyltrimethoxysilane), a product of Harbin Xuejia Fluorosilicon Chemical Co., Ltd.; the hydroxyl-containing silicone oil additives are products of Dow Corning 4-2737 (hydroxyl silicone oil); LF200 is a chlorotrifluoroethylene-vinyl ether fluororesin produced by Asahi Glass Co., Ltd. of Japan, and its brand name is Lumiflon 200, referred to as LF200;

[0051] (2) Specific operation

[0052] Prepare raw materials according to the formulation amount of fluororesin, dispersing aid, solvent, and lubricating filler in Table 3, then add them to the dispersion tank in turn, stir evenly, and then grind and disperse on a sand mill until the fineness is less than 30 microns, which is the lubricating filler Add the fluororesin white slurry, fluororesin yellow slurry,...

Embodiment 3

[0054] Embodiment 3 prepares 4#~7# first component

[0055] (1) The formula is shown in Table 4.

[0056] Table 4

[0057]

[0058] Note: The hydroxyl-containing silicone oil additives in Table 4 are Dow Corning’s product 4-2737 (hydroxyl silicone oil); LF200 is a product of Japan Asahi Glass Co., Ltd.’s chlorotrifluoroethylene-vinyl ether fluororesin, and its brand is Lumiflon 200 , referred to as LF200;

[0059] (2) Specific operation

[0060] Prepare the raw materials according to the formulation amount of fluororesin, dispersing aid, solvent and lubricating filler in Table 4, then add them to the dispersion tank in turn, stir evenly, and then grind and disperse on the sand mill until the fineness is less than 30 microns, which is the lubricating filler Add the epoxy resin white paste, epoxy resin yellow paste, epoxy resin red paste, and epoxy resin black paste prepared in step ① to the prepared lubricating filler paste according to the formula in Table 4. Disperse at...

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Abstract

The invention relates to a coating for the inner wall of an oil field pipeline and a preparation method thereof. A component A of the coating consists of the following components in part by weight: 15 to 50 parts of trifluoroethylene-vinyl ether fluoro-resin, 8 to 30 parts of lubricating filler, 1 to 3 parts of dispersing auxiliary agent, 10 to 20 parts of solvent, 15 to 45 parts of colour paste and 1 to 6 parts of lubricating auxiliary agent, wherein the colour paste consists of the following components in part by weight: 40 to 80 parts of film forming resin, 1 to 3 parts of dispersing auxiliary agent, 10 to 40 parts of solvent and 2 to 40 parts of pigment; and the film forming resin is three kinds of biphenol A epoxy resins, namely biphenol A epoxy resinE-20, biphenol A epoxy resin E-12and biphenol A epoxy resin E-06, or is trifluorochloroethylene-vinyl ether fluoro-resin. A component B of the coating is a curing agent aromatic toluene diisocyanate addition product. Before construction, the component A and the component B are mixed according to a weight ratio of 10 to 1. The coating of the invention is used for coating the inner wall of the oil field pipeline, is corrosion resistant, makes the inner wall of the pipeline have hydrophobic performance and fulfils the aim of reducing resistance and enhancing effect.

Description

technical field [0001] The invention relates to an oil field pipeline inner wall coating and a preparation method thereof. Background technique [0002] Water flooding oil recovery technology is the main method to enhance oil recovery in major domestic oil fields. At present, tubing and casing corrosion is common in water injection production wells, and tubing corrosion or scaling will bring great difficulties to the layered water injection process, reduce oil recovery and cause huge economic losses. However, the efficacy of most pipeline coatings currently only focuses on the anti-corrosion and anti-rust performance of the coating film, and does not pay attention to the hydrophobicity of the coating film. Moreover, the drying speed of the existing coating film is not only relatively slow but also affected by the surrounding environment. influences. This has caused many difficulties in the development of oil fields and affected the development of energy. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D129/10C09D163/02C09D7/12C09D5/08F16L58/10
Inventor 陆文明王李军张荣伟周如东陆梦南
Owner CHINA NAT OFFSHORE OIL CORP
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