DEVELOPMENT OF COMPETITIVE DRILLING FLUIDS FOR HORIZONTAL DIRECTED DRILLING BASED ON BENTONITE OF CHERKASKY DEPOSIT

Taking into account the need for post-war reconstruction of country’s infrastructure, development high-quality drilling fluids based on Ukrainian mineral raw materials becomes a particularly urgent problem. Detailed studies rheological properties aqueous dispersions Na+-bentonite from Cherkasky deposit (Ukraine) were carried out in relation to horizontal directional drilling. The effect pH, ionic strength, concentration solid phase, alkaline reagent (Na2CO3) and polymer additives (PAC PAA) was studied, most important correlations between specified parameters performance characteristics ready-made obtained. A new, more effective PAA is proposed improve viscosity-speed other indicators instead scarce imported PAC-polymer, its optimal determined. It established that with introduction small (0.005–0.025 %) polymer, fluid all not inferior analogues. joint analysis obtained dependencies allowed develop technology obtaining bentonite gel it, which meet requirements Based results comparative wide range deformation rates (0–1312 s–1), competitiveness new has been proven par best foreign Bibl. 17, Fig. 10, Tab. 4.