Lightweight proppant and method of making same

Details Lightweight proppant and method of making same Lightweight proppant and method of making same

C - Chemistry, Metallurgy

04

B

C04B 35/64 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2494051

A method of forming lightweight, high-strength proppants is disclosed, comprising the steps of: homogeneously blending at least one ceramic precursor and at least one pore former; pelletizing the blend to form microspheres; heating the microspheres to less than sintering temperatures, to evaporate volatile components and pyrolyze fugitive components; further heating the microspheres to temperatures sufficient to sinter the continuous phase of the ceramic precursor, to form sintered particles; and then forming the sintered particles into generally spheroid proppants. The generally spheroid proppants, which have preferably been sintered to near theoretical density, may then be coated. Heating of the microspheres may comprise a series of heating stages.

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