FIELD: chemistry.
SUBSTANCE: invention relates to a powder that can be used, in particular, as a drilling additive. Powder comprises hydrolysable polymer particles that do not pass through a sieve having apertures of 500 mcm in an amount of 50 wt. % or more, and has an angle of repose of 51° or more, and a bulk density of 0.30 to 0.54 g/ml.
EFFECT: technical result consists in obtaining a powder for improving drilling properties of drilling fluid and improving the ability to preserve a fracture passing from the underground mine.
5 cl, 7 dwg, 1 tbl, 4 ex
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