METHOD OF PREPARING DRILLING FLUIDS

摘要

FIELD: oil and gas production. SUBSTANCE: drilling fluid is prepared by mixing ingredients, one of them being, as functional additive, apatite concentrate with at least 36 wt % phosphorus oxide, whose particle size ranges from 100 to 5 mcm and fractional makeup is specified. EFFECT: reduced permeability of filter cake of drilling compositions with simultaneous increase in their coagulation stability.