... drilling fluids, as a water shutoff agent, viscosifier, shale stabilizer ... , encapsulating agent and flocculant. This product is functional in fresh water, seawater, KCI brine, and salt (NaCI) water based drilling ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6Hydrolysis Degree 25-30%© 2002 JINYU Drilling Fluids CHINA Tel:86-631-5583632, Fax:86-631-5584149CaoMiaoZi ...