Water-absorbent resin temporary plugging agent and preparation method thereof
A technology of water-absorbing resin and temporary plugging agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems that the plugging agent can hardly meet the functions of acidification and plugging removal and deformation filling, and achieve high toughness and strength, Good adaptability, good acid solubility effect
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Embodiment 1
[0019] Example 1: Add 10.35g of AMPS, 35.54g of AM, and 0.15g of N,N-methylenebisacrylamide into 100g of clear water, fully dissolve, then add 35g of bluestone powder, stir well and adjust the pH to 9 with aqueous sodium hydroxide solution; stir Add 0.027g potassium persulfate and 0.01g sodium sulfite under the condition of raising the temperature to 35°C, and let it stand to react for 2 hours; take out the product, dry it at 100°C, and granulate it to obtain a water-absorbent resin temporary plugging agent, whose structural formula is:
[0020]
Embodiment 2
[0021] Example 2: Add 14.212gAA, 7.108gAM, 0.15gN, N-methylenebisacrylamide into 100g of clear water to fully dissolve, then add 20g of superfine calcium carbonate, stir well and adjust the pH to 11 with aqueous sodium hydroxide solution Add 0.046g of ammonium persulfate and 0.021g of sodium bisulfite to 65°C with stirring, and let it stand for 4 hours; take out the product, dry it at 110°C, and granulate it to obtain a water-absorbent resin temporary plugging agent, whose structural formula is :
[0022]
Embodiment 3
[0023] Example 3: 10.35g AMPS, 2.13gAM, 3.97gN-N-dimethylacrylamide, 3.03gN,N-diethylacrylamide; 0.15gN,N-methylenebisacrylamide were added to 100g of clear water, Fully dissolve, then add 10 parts of bluestone powder and 15g of superfine calcium carbonate, stir well and adjust the pH to 10 with aqueous sodium hydroxide solution; add 0.041g of potassium persulfate and 0.02g of sodium sulfite when the temperature is raised to 65°C under stirring conditions, Stand to react for 3 hours; take out the product, dry at 105°C, and granulate to obtain a water-absorbent resin temporary plugging agent, whose structural formula is:
[0024]
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