Water-Based Lubrication Coating for OCTG Threaded Joints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies face challenges in achieving simultaneous lubrication and rust prevention for oil country tubular goods under actual well conditions, particularly in fire-prohibited environments, while adhering to environmental regulations, and require improved evaluation methods that simulate severe conditions.
Innovation Solution
A chemical agent using a water-soluble or water-dispersible polymer as a binder resin and metal soap as a solid lubricant, forming a dry soft polymer-based resin film that can be quickly dried without volatile organic compounds, ensuring lubrication and rust prevention even under severe conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a water-soluble or water-dispersible polymer is used as a binder resin with metal soap as a solid lubricant, then environmental friendliness and quick drying are improved, but the film formation speed and drying time are worsened due to water's slow evaporation rate
Solution Approach 1:
The patent changes the physical and chemical parameters of the drying process by introducing heat treatment at 40-80°C and infrared irradiation to accelerate water evaporation. This allows the use of water-soluble polymers (environmentally friendly) while compensating for their slow natural drying time through controlled thermal energy input.
Solution Approach 2:
The patent employs periodic drying methods including intermittent heat treatment and infrared irradiation cycles. This periodic energy input efficiently removes water from the coating film without causing excessive heat buildup, achieving quick drying while maintaining the environmental benefits of water-based formulations.
2Loss of time
If volatile organic compounds are used as solvents, then drying speed is improved, but fire safety and environmental compliance are worsened in fire-prohibited environments
Solution Approach 1:
The patent converts the inherent disadvantage of water-based solvents (slow drying) into a benefit by using controlled heat treatment and infrared irradiation. This approach eliminates fire hazards associated with volatile organic compounds while achieving efficient drying through controlled thermal energy, turning a potential weakness into a safety advantage for fire-prohibited environments.
Solution Approach 2:
The patent replaces the chemical mechanism of volatile organic compound evaporation with a physical-thermal mechanism using controlled heat treatment and infrared radiation. This substitution eliminates the need for flammable solvents while maintaining effective drying performance through controlled thermal energy input.
3Measurement precision
If severe conditions are simulated for evaluation, then measurement accuracy is improved, but test complexity and time requirements are worsened
Solution Approach 1:
The patent applies local quality by focusing evaluation on specific critical parameters (thread engagement, torque characteristics, lubrication performance) under simulated severe conditions rather than testing all possible variables. This targeted approach maintains high measurement precision while managing test complexity through selective parameter monitoring.
Solution Approach 2:
The patent employs preliminary action by pre-simulating severe service conditions in the evaluation process, including pre-application of the chemical agent and pre-exposure to environmental stresses. This allows accurate assessment of performance under severe conditions without requiring actual field testing, reducing overall test complexity while maintaining evaluation accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides environmentally friendly lubrication and rust prevention for oil country tubular goods, ensuring quick drying and effective performance under actual well conditions, avoiding harmful substances and simulating severe conditions for accurate evaluation.
Implementation Method 1
forming a dry soft polymer-based resin film that can be quickly dried without volatile organic compounds
Implementation Method 2
metal soap as a solid lubricant
Implementation Method 3
metal soap as a solid lubricant
Implementation Method 4
forming a solid lubrication coating film that imparts lubricity and corrosion resistance to a metal surface
Data Source
AI summary
A chemical agent used to form a solid lubrication coating film on a metal surface contains a solid lubricant, a binder resin, and a solvent. The solvent contains water and a lower alcohol having three or fewer carbon atoms added as an additive to the water, and the additive has a volume of 0.5 or more and 45 or less in terms of 100 set as a volume of the water. The water and the additive account for 95% or more of the volume of the solvent. As the solid lubricant, a metal soap accounts for 95% or more of a sum of total weights of metal soap and alkaline soap components. The binder resin is composed of a water-soluble or water-dispersible polymer and copolymer, and a polymer having an acrylate or methacrylate structure and the copolymer account for 90% or more of a total weight of the binder resin.