CERAMIC PROPPANT AND ITS PRODUCTION METHOD Russian patent published in 2019 - IPC C09K8/80 C04B35/20 C04B35/64 E21B43/267 

FIELD: mining.

SUBSTANCE: method for ceramic proppant production, consists of the following steps: a) preparation, including grinding of the raw materials, containing magniferous material and additional materials to obtain a charge, b) charge pelletization to form the grains of proppant precursor, c) calcination of the proppant precursor grains to produce the proppant grains and the step of prelimenary calcination of magniferous material in a reducing atmosphere, which is carried out prior to the step a). The ceramic proppant, prepared by the above method is characterized by containing enstatite from 50 to 80 wt % and magnesioferrite from 4 to 8 wt. %. Treating method of the subsurface includes providing of the above mentioned ceramic proppant, mixing it with the working fluid for the hydraulic fracturing and introducing the resulting mixture into the subsurface. Application of the above mentioned ceramic proppant - for subsurface fracturing. The invention is developed in the formula dependent claims.

EFFECT: improved performance characteristics of the proppant.

18 cl, 1 tbl, 6 ex