Fluid loss reducer and preparation method thereof
A fluid loss reducing agent and cement slurry technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor dispersion, low safety of cementing construction, pressure leakage salt layer, etc., and achieve good durability High temperature performance and dispersibility, avoiding leakage of the salt paste layer, and improving the effect of high temperature resistance
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[0059] The embodiment of the present invention provides a preparation method of fluid loss reducer, the preparation method comprising:
[0060] Step 1: Add water, 2-acrylamide-2-methylpropanesulfonic acid, cyclic monomer, amide monomer, carboxylic acid monomer, chain monomers, lubricants and surfactants to obtain a reaction solution.
[0061] The parts by weight of each component are: 300-400 parts by weight of water, 100 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 3-5 parts by weight of cyclic monomers, and 8-10 parts by weight of amide monomers. parts by weight, 1 to 3 parts by weight of carboxylic acid monomers, 0.1 to 0.5 parts by weight of chain monomers, 1 to 3 parts by weight of lubricants and 1 to 3 parts by weight of surfactants. sequentially added to the reactor.
[0062] Wherein, the reactor can be a four-necked flask with a thermometer, a stirrer, and a reflux condenser.
[0063] Step 2: Stir at a speed of 200 rpm. After all components are diss...
Embodiment 1
[0072] According to the parts by weight of each component, 300 parts by weight of water, 100 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 3 parts by weight of N-vinylpyrrolidone, 8 parts by weight of The acrylamide of part, the itaconic acid of 2 parts by weight, the first allyl polyethylene glycol of 0.3 part by weight, the talcum powder of 2 parts by weight, the dodecyl dimethyl benzyl ammonium bromide of 1 part by weight , to obtain a reaction solution; stir at a speed of 200 rpm, and after all components are dissolved, adjust the pH of the reaction solution to 8, and raise the temperature of the reaction solution to 60°C; add the initiator to the reaction solution Ammonium persulfate was reacted for 2 hours and cooled to room temperature to obtain fluid loss reducer.
Embodiment 2
[0074] According to the parts by weight of each component, 300 parts by weight of water, 100 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts by weight of N-ethylene caprolactam, 10 parts by weight of N-ethylene caprolactam, N,N-dimethylacrylamide, 3 parts by weight of maleic anhydride, 0.5 parts by weight of the second allyl polyethylene glycol, 3 parts by weight of graphite, 3 parts by weight of dodecylbenzenesulfonic acid sodium to obtain the reaction solution; stir at a speed of 200 rpm, and after all components are dissolved, adjust the pH of the reaction solution to 8, and raise the temperature of the reaction solution to 60°C; agent ammonium persulfate, reacted for 2 hours, and cooled to room temperature to obtain fluid loss reducer.
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