High-grade modification of polyanionic cellulose is designed to control fluid loss of the water-based drilling muds.
Range of applications
The reagent is used to reduce fluid loss of fresh, saline, potassium chloride and salt-saturated drilling muds. It facilitates the development of thin, dense, elastic and tight filter cake, reducing the area of filtrate invasion into the formation, preventing the intrusion of drilling mud solids, reduces the risk of differential pressure sticking. Being a low-viscous modification of PAC, it does not practically increase the viscosity of a drilling mud, unlike the other polymers of this group. Depending on the solids concentration and the salinity of mixing water, treatment with the reagent will increase viscosity within various limits.