MAGNESIUM SILICATE PROPPANT OBTAINING METHOD Russian patent published in 2013 - IPC C09K8/80 C04B35/64 

FIELD: oil and gas industry.

SUBSTANCE: magnesium silicate proppant obtaining method involves preparation of initial charge, its introduction to the composition of a pore-forming additive, crushing, formation of granules, their drying and annealing, which differs by the fact that to the charge there additionally introduced is sintering additive in the form of water-soluble salt of mineral acid that is dissolved in liquid used at granulation, and pore-forming additive in the form of water non-soluble substance is introduced to the charge at the grinding charge; with that, sintering and pore-forming additives are in the following ratio, % above the charge mass: pore-forming additive 0.005-3.0, sintering additive 0.2-2.5.

EFFECT: reduction of proppant density at strength retention.

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