Synthesis and properties of polymer filtration reducer for drilling fluid
In this paper,Copolymer P(AM/DMAM/DMDAAC/MA)was synthesized by aqueous solution po-lymerization of N,N-dimethylacrylamide(DMAM),maleic anhydride(MA)and dimethyldiallylammonium chloride(DMDAAC)with acrylamide as modified monomers.The influence of pH,monomer dosage and po-lymerization time on the filtration loss reduction performance of polymer was studied.Results showed that when the reaction temperature was 55℃,the reaction time was 3 h,the monomer ratio of AM/DMAM/DMDAAC/MA was 7∶2∶2∶0.5,the mass fraction of the monomer was 0.5%.When the temperature reached 180℃,the addition of the quaternary copolymer in the base slurry was 0.5%,the filtration loss of P(AM/DMAM/DMDAAC/MA)copolymer remained at 7.8 mL in fresh water slurry.The filtration rate of quaternary copolymer in fresh water was lower than that of low viscosity CMC in fresh water,in line with SY/T 5621-93 API filtration rate standard.
N,N-dimethylacrylamide(DMAM)maleic anhydride(MA)dimethyldiallyl ammonium chlo-ride(DMDAAC)filtration loss reduction performancefiltrate reducer for drilling fluid
NETL
NSTL
万方数据
维普
