... Application JINYU PHPA A1920 is applicable for use in water based drilling fluids, as a water shutoff agent, viscosifier, shale ... water, seawater, KCI brine, and salt (NaCI) water based drilling fluids. JINYU PHPA A1920 is effective in both low ... fluid systems.Product Advantages - A versative multi-functional additive for most water based drilling fluids.- Easily handled and mixed, disperses rapidly ...