Hydrophobically associating polyacrylamides(HAPAMs) were copolymerized with hydrophilic comonomers acrylamide,sodium acrylic acid a surfactive hydrophobe capable of polymerizing,cetyl dimethyl allyl ammonium chloride,...Hydrophobically associating polyacrylamides(HAPAMs) were copolymerized with hydrophilic comonomers acrylamide,sodium acrylic acid a surfactive hydrophobe capable of polymerizing,cetyl dimethyl allyl ammonium chloride,and the effects of polymer concentration,salt and shear rate on HAPAMs’ apparent viscosity have also been investigated.The results reveal that HAPAMs have advantages in viscosifying ability and salt resistance over conventional polyacrylamide(PAM) and have a comparable shear thinning ability with PAM.展开更多
Hydrophobically associating water-soluble polymers (HPAP) have been synthesized from acrylamide(AM), acrylate (AA), 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and hydrophobic monomer (AP) in aqueous solution...Hydrophobically associating water-soluble polymers (HPAP) have been synthesized from acrylamide(AM), acrylate (AA), 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and hydrophobic monomer (AP) in aqueous solution by radical polymerization. New polymer drilling fluids are made up of HPAP, which is used as viscosifiers and encapsulation agents. Properties of this system are reported in this paper. Results indicate that this system has a high value of yield point to plastic viscosity (YP/PV≥0.7), high viscosity at a low-shear rate (LSRV≥30000mPa·s), excellent shear thinning behavior, good solid-carrying behavior, resistance to shear, good thermal stability (as high as 140℃) and salt resistance. The system has excellent behavior in high-density solution of NaCl and in calcium and magnesium rich saline solutions. Hence, HPAP also can be used in saltwater polymer drilling fluids.展开更多
文摘Hydrophobically associating polyacrylamides(HAPAMs) were copolymerized with hydrophilic comonomers acrylamide,sodium acrylic acid a surfactive hydrophobe capable of polymerizing,cetyl dimethyl allyl ammonium chloride,and the effects of polymer concentration,salt and shear rate on HAPAMs’ apparent viscosity have also been investigated.The results reveal that HAPAMs have advantages in viscosifying ability and salt resistance over conventional polyacrylamide(PAM) and have a comparable shear thinning ability with PAM.
文摘Hydrophobically associating water-soluble polymers (HPAP) have been synthesized from acrylamide(AM), acrylate (AA), 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and hydrophobic monomer (AP) in aqueous solution by radical polymerization. New polymer drilling fluids are made up of HPAP, which is used as viscosifiers and encapsulation agents. Properties of this system are reported in this paper. Results indicate that this system has a high value of yield point to plastic viscosity (YP/PV≥0.7), high viscosity at a low-shear rate (LSRV≥30000mPa·s), excellent shear thinning behavior, good solid-carrying behavior, resistance to shear, good thermal stability (as high as 140℃) and salt resistance. The system has excellent behavior in high-density solution of NaCl and in calcium and magnesium rich saline solutions. Hence, HPAP also can be used in saltwater polymer drilling fluids.