Particulate ceramic useful as a proppant

Details Particulate ceramic useful as a proppant Particulate ceramic useful as a proppant

E - Fixed Constructions

21

B

25/124, 261/24,

E21B 43/267 (2006.01) C04B 35/19 (2006.01) C09K 8/80 (2006.01)

Patent

CA 1232921

ABSTRACT The invention relates to a particulate ceramic made from raw materials which comprise about: 50-97 parts by weight of mineral particulates; 3-50 parts by weight alumina; and at least one part by weight binder; wherein the mineral particulates comprise a ceramic mineral which melts below about 1300°C., does not substantially sublime or volatilize below 1300°C., vitrifies upon cooling, and has a fired density of less than about 2.9 grams per cubic centimeter; wherein the binder is characterized by adhering the mineral par- ticulate and alumina powder together after pelletizing but before firing, and wherein the particulate ceramic itself is characterized by: (i) a concen- tration gradient of alumina from the center to the surface of the particles; and (ii) a fired density less than about 2.9 grams per cubic centimeter. The invention finds use as a proppant in hydraulic fracturing. The invention also relates to the fracturing of subterranean formations surrounding wells using the new particulate material described herein. 33443 CAN 8A

472248

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