MANUFACTURING METHOD OF SILICEOUS PROPPANT, AND PROPPANT Russian patent published in 2012 - IPC C09K8/80 C04B35/64 

FIELD: oil and gas industry.

SUBSTANCE: in manufacturing method of siliceous proppant, which involves charge grinding, granulation and baking of granules, natural highly siliceous sand or its mixture with quartzite in quantity of 1-25% of mass of mixture at SiO₂ content in the charge of not less than 87 wt % is used as charge; grinding is performed to the size of not more than 10 mcm at fraction content of not more than 5 mcm, which is not less than 50 wt %, and calcination - at 1120-1300°C at heating rate of 1000-2500°C/h and cooling rate of 1000-2000°C/h. Siliceous proppant is characterised by the fact that it has been obtained by means of the above method; at that, content of christobalite in calcined granules does not exceed 10 vol %.

EFFECT: decreasing proppant density at maintaining allowable strength values of granules.

3 cl, 2 ex, 1 tbl, 1 dwg