Product Introduction PHPA Powder for Selective Flocculation in Clear-Water Drilling Clear-water or low-solids circulation may depend on removing drilled fines while retaining enough fluid function for transport and stability. BLUFLOC powder PHPA is described in the supplied family TDS as a water-soluble copolymer of anionic character used in drilling-fluid and selected oilfield applications. The four powder grades span very-high and ultra-high molecular-weight classes with