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Anti-sticking solid lubricating coating and its preparation method and coating method

A solid lubrication and coating technology, applied in epoxy resin coatings, coatings, and devices for coating liquids on surfaces, can solve problems such as heavy metal powder environmental pollution, meet performance requirements, facilitate industrial implementation, and improve adhesion Effect

Active Publication Date: 2020-01-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an anti-seize solid lubricating coating and a coating method to obtain an anti-seize coating that does not use thread grease for oil-casing joints, and solve the pollution caused by heavy metal powder in thread grease to the environment

Method used

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  • Anti-sticking solid lubricating coating and its preparation method and coating method
  • Anti-sticking solid lubricating coating and its preparation method and coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Coating composition (mass)

[0030] 10% polyamideimide, 19.99% epoxy resin (E51), 1% polyvinyl butyral, 5% tri-n-butyl citrate, 45% molybdenum disulfide (<0.2μm), 1% trioxide Antimony (<0.5μm), 5% polytetrafluoroethylene (<0.2μm), 1% melamine urate, 10% titanium dioxide (<0.12μm), 2% calcium stearate, 0.01% additives.

[0031] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 220°C for 0.3 hours in a drying oven.

[0032] Results: After the above treatment, the bonding strength between the coating and the threaded joint of 110 steel grade was grade 1; no sticking occurred after 10 times of make-up and breakout; no corrosion spots after 100 hours of neutral salt spray test.

Embodiment 2

[0034] Coating composition (mass)

[0035] 29.99% polyamideimide, 5% epoxy resin (E51), 8% polyvinyl butyral, 1% tri-n-butyl citrate, 20% molybdenum disulfide (<0.2μm), 10% trioxide Antimony (<0.5μm), 15% polytetrafluoroethylene (<0.2μm), 5% melamine urate, 1% titanium dioxide (<0.12μm), 5% calcium stearate, 0.01% additives.

[0036] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 250°C for 0.3 hours in a drying oven.

[0037] Results: After the above treatment, the bonding strength between the coating and the threaded joint of 110 steel grade was grade 1; no sticking occurred after 10 times of make-up and breakout; no corrosion spots after 100 hours of neutral salt spray test.

Embodiment 3

[0039] Coating composition (mass)

[0040] 20% polyamideimide, 15% epoxy resin (E51), 9.99% polyvinyl butyral, 3% tri-n-butyl citrate, 28% molybdenum disulfide (<0.2μm), 5% trioxide Diantimony (<0.5μm), 8% polytetrafluoroethylene (<0.2μm), 2% melamine urate, 7% titanium dioxide (<0.12μm), 2% calcium stearate, 0.01% additives.

[0041] Coating process: the pressure of the spray gun is 0.25MPa, and the temperature is kept at 230°C for 0.3 hours in a drying oven.

[0042] Results: After the above treatment, the bonding strength between the coating and the threaded joint of 110 steel grade was grade 1; no sticking occurred after 10 times of make-up and breakout; no corrosion spots after 100 hours of neutral salt spray test.

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Abstract

The invention discloses anti-gluing solid lubricating paint as well as a preparation method and an applying method thereof. The paint comprises the following ingredients in percentage by weight: 16-60% of mixed resin, 1-5% of a toughening agent, 26-70% of a solid lubricant, 2-15% of an anticorrosive etching reagent, 1-5% of a wear-resisting additive, 0.01-0.1% of other additives and the balance of a solvent. The paint, the preparation method and the applying method have the advantages that the thickness of a coating can be conveniently controlled according to a surface coating method of a joint of an oil casing; the process is simple; the operation is easy; the industrial implementation is realized conveniently.

Description

technical field [0001] The invention relates to a method for surface treatment of joints used in oil exploration and production, and belongs to the technical field of surface treatment, in particular to a solid lubricating paint and coating method for threaded joints of oil and casing. Background technique [0002] Oil and gas exploration and development must use oil and casing products. The casing is threaded to form a casing string to form an oil production channel, and the oil pipe is threaded to form a tubing string for oil production. The oil-casing joint is composed of internal thread and external thread. During use, the thread is tightened and loosened by make-up and breakout. The threaded joint is equivalent to a pair of friction pairs. When the surfaces of the internal thread and the external thread contact each other, microscopic From the point of view, the actual contact area of ​​the two contact bodies is only on a few asperities on the joint surface. Due to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D163/00C09D129/14C09D7/61C09D7/63C09D7/65B05D5/08B05D7/24
CPCB05D5/08B05D7/24B05D2401/10B05D2504/00B05D2505/50B05D2506/15B05D2518/00B05D2601/20B05D2601/24B05D2602/00C08L2205/035C09D163/00C09D179/08C08L79/08C08L29/14C08L27/18C08K13/02C08K5/11C08K2003/3009C08K3/2279C08K5/34928C08L63/00
Inventor 王琍罗蒙蔡蕴斌
Owner BAOSHAN IRON & STEEL CO LTD
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