Zwitterionic Strong -O le Mo FA367 suāvai viliina Sulfomethylated Phenolic Resin Tuuina Plugging Angent Mo suāvai viliina Vevela ma masima reducer leiloa suāvai inhibitory kalisiu tetee mo vai viliina JT888 EP uʻu Potassium Polyacrylamide for Drilling Fluid KPAM Zwitterionic ogatasi Polymer Reducer XY-27 Faalenatura Polymer Fluid Loss Sui Low uʻu suavaia Fluorescence Barite