We produce high quality bentonite powders (PB-NB1 and PB-NB2) for rapid development of draw-in construction of underground communications by directional drilling method. The Quality characteristics of bentonite powders for drilling fluids intended for directional drilling boreholes are presented in the Table.

Properties Unit PB-NB1 PB-NB2 Relative viscosity sec, no less than 40 25 Moisture content % 12 12 Sand fraction content % 3 3 Filtration index cm 3, no more than 15 15

Bentonite powders for drilling fluids used in directional drilling have high technological properties:

• high reological properties of the suspension
• low sand content
• short time of dispersion.

Bentonite of the highest quality and environmentally friendly reagents are used in the production of bentonite powders. For the rigid environmental requirements bentonite powder PB-NB1E is produced with out any additives.