Salt-resistant and calcium-resistant filtrate reducer applied to drilling fluid and preparation method of filtrate reducer
A technology of anti-salt, anti-calcium, and fluid loss reducer, which is applied in the direction of chemical instruments and methods, and drilling compositions, etc., can solve the problems of complex formation structure, unsatisfactory, increased drilling, etc., and achieve environmental friendliness, molecular weight increase, The effect of improving rheology
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[0028] (1) Weigh 50 g of 2-acrylamide-2-methylpropanesulfonic acid, 8 g of acrylic acid, 35 g of acrylamide, 7 g of dimethyldiallyl ammonium chloride, 0.8 g of ammonium persulfate, 0.6 g of g of sodium sulfite and 0.2 g of isopropanol;
[0029] (2) Dissolve 50 grams of 2-acrylamide-2-methylpropanesulfonic acid and 8 grams of acrylic acid weighed in step (1) in 200 grams of deionized water to form an anionic monomer solution, and then use a mass fraction of 40% The pH of the anionic monomer solution is adjusted to 8-9 with the sodium hydroxide solution;
[0030] (3) ammonium persulfate and sodium sulfite weighed in step (1) are respectively dissolved in 13 grams of water to form oxidation initiator solution and reduction initiator solution; In the flask, add 100 mL of deionized water, then pass nitrogen for 15 min, stir for 5 min, and the stirring speed is 300 r / min; then add the anionic monomer solution prepared in step (2) under stirring conditions into the four-necked fla...
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