| Abstrakt: |
In order to keep the water-based drilling fluid well suspended, carry and stabilize the wellbore performance in a high temperature environment, styrene (St), acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and dimethyl diallyl ammonium chloride (DMDAAC) are functional monomers, and quaternary copolymers (FSPV) are synthesized by atom transfer radical polymerization. The product was characterized by infrared spectroscopy, thermogravimetric analysis and other methods, and its temperature resistance and rheological properties were evaluated. The research results show that the molecular weight of the quaternary copolymer FSPV is 8.5l x106 , and the thermal stability is good. After hot rolling at 180°C, when the dosage of rheology modifier FSPV is 1 %, the apparent viscosity of the slurry is 22.5mPa·s. And the rheology modifier FSPV can effectively increase the viscosity of the 30%NaCl base slurry and 1 %Ca Cl2 base slurry, the viscosity is greater than 18mPa·s. The result shows that the rheology modifier FSPV has excellent temperature resistance, viscosity increasing and anti - pollution performance. [ABSTRACT FROM AUTHOR] |
