PROPPING AGENT PARTICLES FORMED FROM SUSPENSION DROPS, AND METHOD OF APPLICATION Russian patent published in 2017 - IPC C04B35/10 C09K8/80 E21B43/267 

FIELD: mining.

SUBSTANCE: invention relates to particles of propping agent for underground formation hydraulic fracturing. Propping agent manufacturing method involves making of ceramic raw material suspension, including reagent, containing polysaccharide, characterized by solid phase content of approximately from 25 to 75 wt%, formation of suspension drops by passing suspension via nozzle at its vibration exposure, with passing rate from approximately 0.2 to 3 kg/h, bringing suspension drops into contact with coagulant containing liquid surface, extraction of drops from liquid, drying drops with formation of molded granules and granules sintering in temperature range with formation of propping agent particles. In another version, in propping agent particles production method performing above mentioned production of alumina suspension. In third version in said method performing above mentioned production of kaolin suspension, wherein propping agent particles are characterized by long-term permeability, greater than 85 D, at strain of 10,000 psi and temperature of 250 °F, measured according to ISO 13503-5. Invention is developed in depending points of the formula.

EFFECT: technical result is higher strength.

37 cl, 12 dwg, 4 tbl