FIELD: oil and gas production. SUBSTANCE: invention relates to lubricants, which are added to corresponding drilling muds during boring. Concentrate containing liquid and/or solid (at normal temperature) organic components exhibiting lubricating properties finely dispersed together with emulsifiers in continuous phase has phase inversion temperature above ambient temperature and is prepared by heating multiphase system to temperatures equal or superior to phase inversion temperature. Concentrate additionally contains extreme-pressure agents. EFFECT: enhanced lubrication efficiency at least in early utilization phase. 13 cl, 1 tbl
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