FIELD: well drilling. SUBSTANCE: concentrate contains, wt %: oil phase (tallow oil), 10-20; lubricating additive, 5-20; nonionic emulsifier, 10-20; and water, the balance. Lubricating additive is hydrolyzate of humic acids or their derivatives. Concentrate is applicable for various-destination wells. Working fluids are prepared by 20-100-fold diluting concentrate by water. EFFECT: improved lubricating characteristics of solutions containing concentrate. 2 tbl
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