REMOVE FINES FROM A SPENT AQUEOUS WELL TREATING FLUID

摘要

Method of removing fines from a spent aqueous well treating fluid containingfines, a water-soluble polymer, a salting-out anionand/or a slightly soluble calcium or magnesium compound comprising the stepsof: (a) raising the pH of the aqueous well treating fluid toallow agglomeration of the fines and precipitation of the water-solublepolymer; and (b) separating the agglomerates from the aqueous welltreating fluid.