Inorganic-organic polymer processing agent for drilling fluid and preparation method thereof
A treatment agent and drilling fluid technology, which is applied in the field of synthesis and preparation of water-soluble polymer materials, can solve the difficulty of temperature resistance and salt resistance, and the treatment agent no longer faces the problems of temperature resistance and salt resistance, so as to achieve good protection effect and control hydration The effect of dispersion and simple production process
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Embodiment 1
[0019] 1) Add 22.8 kg of potassium hydroxide and 130 kg of water into the neutralization kettle, add 21 kg of bentonite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 48 kg of 2-acrylamide dodecylsulfonic acid and 18 kg of acrylic acid under the condition that the temperature does not exceed 35°C, and continue stirring for 10 to 15 minutes after the addition is complete. Add 55 kg of N,N-dimethylacrylamide, and continue to stir for 25 to 30 minutes after the addition to obtain a reaction mixture;
[0020] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 5-10 minutes, and adjust the pH value of the system to 10.5 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.6 kg of sodium persulfate and 1.2 kg of ferrous sulfate (an aqueous solution prepared with an appropriate amount of water), stir for about 9 minutes and then st...
Embodiment 2
[0022] 1) Add 14 kg of sodium hydroxide and 160 kg of water into the neutralization kettle, add 18 kg of bentonite after complete dissolution, and grind with a colloid mill after stirring evenly. Add the ground mixed liquid to the reaction kettle, and slowly add 20.8 kg of acryloyloxybutanesulfonic acid and 29 kg of maleic acid under the condition that the temperature does not exceed 35 ° C, and continue stirring for 15 to 25 minutes after the addition is complete. Add 26.5 kg of acrylonitrile, and continue to stir for 25 to 30 minutes after the addition, to obtain a reaction mixture;
[0023] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 5-10 minutes, and adjust the pH value of the system to 11.0 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.35 kg of sodium persulfate and 0.7 kg of ferrous chloride (an aqueous solution prepared with an appropriate amount of water), stir for about 5 to 15 minutes and then stand...
Embodiment 3
[0025] 1) Add 35 kg of potassium bicarbonate and 150 kg of water into the neutralization kettle, add 14 kg of bentonite and 3.5 kg of aluminum tripolyphosphate after being completely dissolved, and grind with a colloid mill after stirring evenly. Add the ground mixture into the reaction kettle, slowly add 20.8 kg of 2-acryloyloxy-2-methylpropanesulfonic acid and 32.5 kg of itaconic acid under the condition that the temperature does not exceed 35°C, and continue stirring after the addition is complete 15-20 minutes. Add 49.5 kg of N,N-dimethylacrylamide, and continue stirring for 15 to 20 minutes after the addition, to obtain a reaction mixture;
[0026] 2) Add the reaction mixture obtained in step 1) into the polymerization tank, stir for 5-10 minutes, and adjust the pH value of the system to 8.5 with a sodium hydroxide solution with a mass fraction of 10%-40%. Add 0.35 kg of ammonium persulfate and 0.7 kg of sodium metabisulfite (an aqueous solution prepared with an appropri...
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