... Application JINYU PHPA A1920 is applicable for use in water based drilling fluids, as a water shutoff agent, viscosifier, shale stabilizer, encapsulating agent and ... the chemical hopper may cause foaming or aeration of the mud.When using JINYU PHPA A1920 as a flocculant, treatment ... : no oil components and surfactants, no secondary pollution to water, lower cost. PHPA-Drilling mud chemicals