... pharmaceutical,B. Fine chemical,C. Agriculture,D. Oil drilling, and so on3. Advantages.1. Outstanding viscosity- ... -extraction, and so on.It is specially produced as mud additive for oil drilling. Being an environment ... drilling, stabilize the well-bore, prevent the damage to oil formation, and improve the efficiency of drilling, work-over and completion5. Package: 25kg/bag, 25kg/barrel oil drilling ...