coagulants and flocculants phpa partial hydrolyzed in brazil

coagulants and flocculants phpa partial hydrolyzed in brazil
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  • How does PHPA affect fluid rheology?
  • The introduction of higher molecular weight synthetic polymers typified by partially hydrolysed polyacrylamide (PHPA) allowed the same effect on fluid rheology to be achieved at much lower additive concentrations, a major practical advantage.
  • Does encapsulation of cutting particles based on PHPA polymers prevent flocculation?
  • Conclusions The effective encapsulation of cutting particles suspended in drilling fluids based on PHPA polymers severely limits (if not prevents) subsequent flocculation by dosing similar anionic flocculants.
  • How does PHPA polymer affect rheological and fluid loss properties?
  • The enhanced rheological properties were attributed to the formation of strong hydrogen bonding network in the drilling fluid which also reduced the fluid loss and enhanced the pore connectivity in the filter cake to minimize the formation damage. (Kelessidis et al., 2013) studied the effect of PHPA polymer on rheological and fluid loss properties.
  • Do modified CMC and PHPA polymer drilling fluids affect rheological properties?
  • Kuma et al. investigated modified CMC and PHPA polymer drilling fluids with NaCl and KCl and haematite mineral where KCl and NaCl acted as great swelling inhibitors for drilling muds, while haematite just slightly increased the rheological properties on CMC–bentonite mud and did not have much effect on the PHPA–bentonite mud [ 26 ].