Instant water-in-oil resistance-reducing agent and preparation method thereof
A water-in-oil, drag-reducing agent technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve the effects of good stability, good compatibility and less dosage
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[0028] According to the mass ratio of 6:1:3, 48.0g of monomer monomer acrylamide, 8.0g of methacrylic acid, and 24.0g of 2-acrylamide-2-methylpropanesulfonic acid were weighed with a precision balance, and dissolved in 120.0 g of water, and keep stirring until the solution becomes clear after the monomer is completely dissolved, then use Na 2 CO 3 The pH value was adjusted to about 7.0, and the aqueous phase was prepared successfully.
[0029] Take 60.0 g of white oil with a precision balance, and add 3.0 g of compound surfactant under stirring to make the two completely dissolve. The compounded surfactant is prepared by mixing Span-80 and Tween-80 at a ratio of 7:3, and the compounded emulsifier has an HLB value of 7.5.
[0030] Then, first pour the oil phase into a 250mL three-neck flask, place the three-neck flask in a constant temperature water bath at 20°C, and keep stirring; then slowly drop the water phase into the oil phase to fully emulsify it to form a microemulsio...
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