Temperature-sensitive polymer and preparation method thereof, drilling fluid flow pattern regulator composition, drilling fluid flow pattern regulator and preparation method thereof
A technology of flow regulator and polymer, which is applied in the field of drilling fluid, can solve the problems of large rheological changes of drilling fluid, difficulty in well lost circulation and pressure control, and large difference in ECD value, so as to reduce input, save raw material use, good rheological effect
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[0074] The selection and dosage of each material in the method for preparing the drilling fluid flow pattern regulator of the present invention are the same as those in the drilling fluid flow pattern regulator composition of the present invention, and will not be repeated here.
[0075] In step (1), preferably, the conditions of the first contact reaction include: the temperature is 40-70°C, and the time is 1.5-5 hours; more preferably, the conditions of the first contact reaction include: the temperature is 45-60°C, the time is 2-4 hours.
[0076] In step (2), preferably, the second contacting conditions include: a temperature of 40-70°C; more preferably, the second contacting conditions include: a temperature of 45-60°C. The time for the second contact is not particularly limited, as long as the materials are mixed uniformly.
[0077] In step (3), preferably, the conditions of the third contact include: a temperature of 20-40°C; more preferably, the conditions of the third...
Embodiment 1A
[0084] (1) Add 0.06 mol of 1,12-dibromododecane, 0.084 mol of 1,4-dimethylpiperazine and 75 mL of dimethyl sulfoxide into a 1000 mL dry three-neck flask, and react at 55°C for 3 hour, then add N-methylimidazole 0.002mol and N-methylmorpholine 0.002mol, react at 55° C. for 3 hours, and remove the solvent by distillation under reduced pressure to obtain polyquaternium salt;
[0085] (2) 1mmol of m-benzenetricarboxylic acid and 1mmol of 3,3'-diaminobenzidinediamine are added to 30g of polyphosphoric acid containing 82wt% phosphorus pentoxide (Anhui Longhua Chemical Co., Ltd., PPA-82 type), under the condition of nitrogen protection, react at 145°C for 3 hours, and then continue to react at 192°C for 18 hours. = 4.5, then neutralized with sodium bicarbonate to pH = 7, filtered, the collected polymer was added to ammonia water with a pH of 9.5, stirred at 75°C for 12 hours, filtered, the sample was washed to neutral, and dried in vacuo , to obtain a hyperbranched polybenzimidazole...
Embodiment 2A
[0088] (1) Add 0.1 mol of 1,12-dibromododecane, 0.092 mol of 1,4-dimethylpiperazine and 85 mL of dimethyl sulfoxide into a 1000 mL dry three-necked flask, and react at 45°C for 6 Hour, add N-methylimidazole 0.0022mol and N-methylmorpholine 0.0022mol again, react at 45 ℃ for 6 hours, after decompression distillation removes solvent, make polyquaternium salt;
[0089] (2) 1.2mmol of m-benzenetricarboxylic acid and 1.2mmol of 3,3'-diaminobenzidinediamine are added to 30g polyphosphoric acid containing 85wt% phosphorus pentoxide (Anhui Longhua Chemical Co., Ltd., PPA -85 type), under the condition of nitrogen protection, react at 150°C for 1.5 hours, and then continue to react at 190°C for 20 hours. to pH = 4.0, then neutralized to pH = 6.0 with sodium bicarbonate, filtered, and the collected polymer was added to ammonia water with a pH of 10.0, stirred at 80°C for 10 hours, filtered, and the sample was washed to neutrality. Vacuum-dried to obtain a hyperbranched polybenzimidazol...
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