Product Introduction PHPA Shale Inhibitor Powder for Sloughing Formation Control Sloughing can arise from hydration and dispersion, but also from stress, bedding, fractures, time-dependent failure, or unsuitable mud weight. 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