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Preparation and application of ultrahigh wear-resisting hydrogen sulfide-proof polyether-ether-ketone aqueous suspension specially used for oil-well tube

A water-based suspension, polyetheretherketone technology, applied in drilling equipment, polyether coatings, devices for coating liquid on the surface, etc., can solve the problems of inconvenient use, unsatisfactory coating toughness and wear resistance, and high cost , to achieve low VOC content, small surface resistance, and reduce the effect of conveying resistance

Inactive Publication Date: 2010-03-10
SHANGHAI HILONG ANTI CORROSION TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing development of high hydrogen sulfide oil and gas fields, there are methods of adding corrosion inhibitors, using sulfur-resistant steel and spraying epoxy phenolic system solvent-based coatings to prevent internal corrosion of oil pipes and gathering pipelines. The disadvantage of the first two is the use of Inconvenient, high cost, and the disadvantage of using epoxy phenolic coating is that the toughness and wear resistance of the coating are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A polyetheretherketone aqueous suspension, the aqueous suspension comprises the following components in mass percent:

[0023] Polyetheretherketone (VICOTE704) 38%

[0024] Water 46%

[0025] Ethylene glycol 6%

[0026] Surfactant (AFCONA5071) 2%

[0027] Thickener (Shanghai Shuangrun Chemical Industry 935) 1%

[0028] Corrosion inhibitor (Shanghai Shuangrun Chemical 601) 0.5%

[0029] Ceramic powder 5%

[0030] Defoamer (BYK021) 0.5%

[0031] Defoamer (BYK094) 0.5%

[0032] Fumed silica 0.5%

[0033] After the polyether ether ketone aqueous suspension is sprayed on the equipment by high-speed rotary airless spraying process, the plasticizing temperature is 380-400 degrees, and the plasticizing time is 5-15 minutes. After the coating film is melted, it is cooled to 250-300 degrees with the furnace Rapid cooling in water, and then heat treatment at 200 degrees for 3 hours. The coating film is tested by a Table abrasion tester, with a counterweight of 1000 grams ...

Embodiment 2

[0035] A polyetheretherketone aqueous suspension, the aqueous suspension comprises the following components in mass percent:

[0036] Polyetheretherketone (VICOTE704) 28%

[0037] Titanium dioxide 10%

[0038] water 47%

[0039] Surfactant (AFCONA5071) 2%

[0040] Corrosion inhibitor (Shanghai Shuangrun Chemical 601) 0.5%

[0041] Defoamer (BYK020) 1%

[0042] Fumed silica 1.5%

[0043] Ethylene glycol ether 5%

[0044] Ethylene Glycol 5%

[0045] After the polyether ether ketone aqueous suspension is sprayed on the equipment by high-speed rotary airless spraying process, the plasticizing temperature is 380-400 degrees, and the plasticizing time is 5-15 minutes. After the coating film is melted, it is cooled to 250-300 degrees with the furnace Rapid cooling in water, and then heat treatment at 200 degrees for 2 hours, the coating film is tested by a Table abrasion tester, with a counterweight of 1000 grams, 1000 revolutions, and the weight loss is 1 mg.

Embodiment 3

[0047] A polyetheretherketone aqueous suspension, the aqueous suspension comprises the following components in mass percent:

[0048] Polyetheretherketone (VICOTE704) 28%

[0049] Titanium dioxide 10%

[0050] Aluminum tripolyphosphate 8%

[0051] Water 42%

[0052] Surfactant (Coning 558) 2%

[0053] Fumed silica 1.5%

[0054] Corrosion inhibitor (SER-AD FA 179) 0.5%

[0055] Defoamer (Airex901 W-Tego) 1%

[0056] Ethylene glycol 7%

[0057] After the polyetheretherketone aqueous suspension is sprayed on the equipment by high-speed rotary airless spraying process, the plasticizing temperature is 380-400 degrees, and the plasticizing time is 15 minutes. After the coating film is melted, it is cooled to room temperature with the furnace. Abrasion tester test, 1000g counterweight, 1000 revolutions, weight loss is 1.8mg.

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PUM

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Abstract

The invention provides an ultrahigh wear-resisting hydrogen sulfide-proof polyether-ether-ketone aqueous suspension specially used for oil-well tubes, which has extremely low VOC content. After beingcoated on the internal wall of the oil-well tube by a high-speed rotating airless spraying process, the suspension provides a coating layer with the performances of high wear resistance, self-lubrication, high-temperature and high-pressure resistance, hydrogen sulfide resistance and corrosion protection. The aqueous suspension can be sprayed by air and can be applied to various nut threads and various impellers so as to improve the chemical resistance and wear resistance of the equipment. The PEEK aqueous suspension has excellent self-lubrication, provides less surface resistance for the equipment and has excellent effect in reducing conveying resistance and saving energy.

Description

technical field [0001] The invention relates to the field of special coatings for oil well pipes, in particular to the preparation of a polyetheretherketone aqueous suspension and a coating method for the suspension in oil well pipes by high-speed rotating airless spraying. Background technique [0002] OCTG containing CO 2 、H 2 S, Cl - Corrosion perforation and bursting are often prone to occur when serving in a variety of corrosive media such as high temperature and high pressure multiphase environments, resulting in pipe string drop and oil and gas leakage, and even vicious accidents such as blowouts. In addition to causing heavy economic losses and casualties, these accidents also caused a series of vicious consequences such as suspension of work and production, environmental pollution, etc., which interrupted oil and gas transmission, prevented production, and destroyed the ecological environment. For example, Changqing Gas Field, the largest integrated gas field in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/08C08K13/02C08K5/053C08K3/36C08K3/22C08K5/06C08K3/32C08K3/34C08L1/26C09D171/08C09D7/12C09D5/00C09D5/08B05D7/26B05D3/00E21B17/00
CPCC10M2201/105C10M2201/103C10M2201/062C10M2201/02C10M2201/085C10N2230/06C10M107/32C10M107/34C10M2207/046C10M2209/1013C10M173/02C10N2030/06
Inventor 任飙孙健梁擘聃郭贵全
Owner SHANGHAI HILONG ANTI CORROSION TECH ENG
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