Riteks GA-100 is a polysaccharide polymer that provides viscosifying and suspension benefits for drilling muds and viscosified systems. Its unique high viscosity in the low shear can help low concentration of the drilling fluid suspend solids. It can increase the mud penetrative rate and suspension ability to the drilling-cuttings. Meanwhile, it can also reduce the pressure loss during drilling, stabilize the well-bore, prevent the damage to oil formation, and improve the efficiency of drilling, work-over and completion.