A kind of preparation method of drilling fluid lubricant
A technology for lubricants and drilling fluids, applied in the field of preparation of drilling fluid lubricants, can solve the problems that oil-soluble resins are not ideal in lubricating oil solubility and biodegradation, are not suitable for mass production, have strong irritating odors, etc. Low critical micelle concentration, good lubrication and drag reduction, and simple production process
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Embodiment 1
[0022] A preparation method of drilling fluid lubricant, comprising the following steps:
[0023] 1) Amidation reaction: 40g of waste oil, 20g of diethanolamine, and 12g of NaOH solution with a mass concentration of 30% were subjected to amidation reaction, the reaction temperature was controlled at 110°C, and the reaction time was 5h;
[0024] 2) Esterification reaction: lower the temperature to 65°C, add 12g of boric acid to the reactant prepared in step 1) for reaction, the reaction temperature is controlled at 60°C-70°C, and the reaction time is 4h;
[0025] 3) Add 0.5g of lipopeptide surfactant and 1g of solid lubricant to the reactant prepared in step 2), mix and stir evenly at 30°C for 30min to prepare bio-oil borate drilling fluid lubricant and solid lubricant For graphite powder.
Embodiment 2
[0027] A preparation method of drilling fluid lubricant, comprising the following steps:
[0028] 1) Amidation reaction: 55g of waste oil, 18g of diethanolamine, and 8g of KOH solution with a mass concentration of 30% were subjected to amidation reaction, the reaction temperature was controlled at 100°C, and the reaction time was 4h;
[0029] 2) Esterification reaction: lower the temperature and control the temperature to 60°C, add 6g of boric acid to the reactant prepared in step 1) for reaction, the reaction temperature is controlled at 60°C-70°C, and the reaction time is 2h;
[0030] 3) Add 0.1g of lipopeptide surfactant and 3g of solid lubricant to the reactant prepared in step 2), mix and stir evenly at 40°C for 20 minutes to prepare bio-oil borate drilling fluid lubricant and solid lubricant For graphite powder.
Embodiment 3
[0032] A preparation method of drilling fluid lubricant, comprising the following steps:
[0033] 1) Amidation reaction: 60g of waste oil, 16g of diethanolamine, and 6g of NaOH solution with a mass concentration of 30% were subjected to amidation reaction, the reaction temperature was controlled at 120°C, the reaction time was 6h, and the organic alcohol amine was diethanolamine;
[0034] 2) Esterification reaction: lower the temperature to 70°C, add 8g of boric acid to the reactant prepared in step 1 for reaction, the reaction temperature is controlled at 70°C, and the reaction time is 3h;
[0035] 3) Add 0.3g of rhamnose surfactant and 5g of solid lubricant to the reactant prepared in step 2), mix and stir evenly at 50°C for 40min to obtain bio-oil borate drilling fluid lubricant, solid lubricant The agent is graphite powder.
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