Oil-based drilling fluid filtrate reducer containing cross-linked structure, and preparation method
A technology of oil-based drilling fluid and cross-linked structure, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the gap in filtration performance, enhance plugging and wall-building performance, and improve filtration reduction. effect, the effect of wide application prospects
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[0043] Example 1:
[0044] Weigh 0.1 kg of lauric acid and 1 kg of triethylenetetramine, add them to the reaction vessel, heat to dissolve and stir evenly, and then pass nitrogen for 30 minutes to increase the temperature of the system to 80 o C, react for 8 h. Reduce the system temperature to 75 o About C, add 25 kg of humic acid, stir evenly, and after blowing nitrogen for 20 minutes, increase the temperature of the system to 90 o C, react for 10 h. Add 0.005 kg of suberic acid to the system, stir evenly, the system is at 100 o Reaction for 6 h at C. The product is cooled to room temperature, crushed with a pulverizer, and passed through a 50-mesh sieve to obtain the product.
Example Embodiment
[0045] Example 2:
[0046] Weigh 30 kilograms of lauric acid and 1 kilogram of triethylenetetramine, add them to the reaction vessel, heat to dissolve and stir evenly, bubbling nitrogen for 20 minutes, and increase the temperature of the system to 160 o C, react for 15 min. Reduce system temperature to 85 o About C, add 0.5 kg of humic acid, stir evenly, bubbling nitrogen for 30 minutes, and raise the temperature of the system to 180 o C, react for 15 min. Add 5 kg of suberic acid to the system, stir evenly, the system is at 200 o At C, react for 15 min. The product is cooled to room temperature, pulverized with a pulverizer, and passed through a 100-mesh sieve to obtain the product.
Example Embodiment
[0047] Example 3:
[0048] Weigh 15 kilograms of palmitic acid and 1 kilogram of tetraethylene pentamine, add them to the reaction vessel, heat to dissolve and stir evenly, then blow nitrogen for 20 minutes, and raise the temperature of the system to 120 o C, react for 3 h. Lower the system temperature to 80 o About C, add 5 kg of humic acid, stir evenly, bubbling nitrogen for 28 minutes, and increase the temperature of the system to 120 o C, react for 3 h. Add 0.5 kg of lauric acid to the system, stir evenly, the system is at 130 o Reaction for 3h at C. The product is cooled to room temperature, crushed with a pulverizer, and passed through a 70-mesh sieve to obtain the product.
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