WATER-WETTED ADDITIVE FOR DRILLING MUD, METHOD OF PREPARATION THEREOF, AND METHOD OF DRILLING BOREHOLE

摘要

FIELD: oil and gas production. SUBSTANCE: additive contains previously prepared mixture of juintaite with softening temperature 187-199 and 104-165 C with applied nonionic surfactant and causticized lignite. EFFECT: reduced shale caving and instability of borehole under drilling. 10 cl, 6 tbl