... other industy. API bentonite(used in Water based well drilling mud) Hangzhou Jingyi Chemical Co.,Ltd use the high quality of ... bentonite to produce the well drilling mud. This product is according with GB-T5005-2001(eqvISO13500:1998 ... suspension, high thixotropy ,little filtrate volume ,excellent capacity of making mud, conveniently use and is easy to adjust the density of ...