| abstract |
The invention discloses a thermal tackifying copolymer type cement slurry high temperature stabilizer and a preparation method thereof. A cross-linked copolymer obtained by copolymerizing ammonium chloride, a temperature-sensitive monomer and a cross-linking agent, the molecular weight of which is 7×10 5 to 9×10 5 ; wherein, the temperature-sensitive monomer is N-isopropylacrylamide or N-vinyl caprolactam; the cross-linking agent is divinyl benzene or N,N-methylenebisacrylamide; the high temperature stabilizer for cement slurry has obvious viscosity increasing effect at high temperature, can significantly improve the high temperature stability of cement slurry, and can resist The temperature performance can reach 180 ℃, which can solve the problem of poor stability of cement slurry caused by thinning of other additives and aggravation of cement particle settlement in deep wells and ultra-deep wells, and has no adverse effect on the comprehensive performance of cement slurry. Construction requirements; the preparation method of the thermal tackifying copolymer cement slurry high temperature stabilizer and the preparation method are simple in process, low in cost, and have market promotion and application prospects. |