| abstract |
A method for producing drilling compositions by mixing the ingredients is proposed, in which an apatite concentrate with a mass fraction of phosphorus oxide of at least 36% and a degree of grinding from 100 to 5 μm, the fractional composition of which is characterized by a residue on sieve N 0071k of no more than 10% in quantity not less than 1%. Achievable as a result of the implementation of the proposed invention, the technical result is to reduce the permeability of the filter cake of the drilling compositions while increasing their coagulation stability. |