Use of uncalcined/partially calcined ingredients in the manufact

Wells – Processes – Specific propping feature

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501127, E21B 43267

Patent

active

046588990

ABSTRACT:
A composite, sintered, spherical pellet and a method for its manufacture are described. The pellet is prepared from at least one uncalcined or partially calcined ingredient selected from the group consisting of clay and bauxite materials, dust collector fines and alumina. The pellet may have an alumina-to-silica ratio from about 9:1 to about 1:1. The pellet has a specific gravity of less than 3.40. Use of such pellets in propping hydraulically fractured subterranean formations is also described.

REFERENCES:
patent: 3758318 (1973-09-01), Farris et al.
patent: 3976138 (1976-08-01), Colpoys, Jr. et al.
patent: 4068718 (1978-01-01), Cooke, Jr. et al.
patent: 4522731 (1985-01-01), Lunghofer
"Light Weight Proppants for Deep Gas Well Stimulation", 2nd Annual Report, Jul. 1, 1980-Jun. 30, 1981, published Apr. 1982, DOE Contract AC19-79BC10038, by R. A. Cutler et al, Terra Tek, Inc.
"Light Weight Proppants for Deep Gas Well Stimulation", Final Report, Dec. 1983, DOE Contract AC-19-79BC10038, by R. A. Cutler et al, Terra Tek Engineering.
Letter: 10/17/85, to J. Orsini from D. Wirth, Coors Porcelain Co.
Letter: 8/24/78, to B. Poplin from D. Golden, Coors Porcelain Co.
Coors Porcelain Company, High-Strength Proppant Proposal, presented to Haliburton Services, 8/9/78.

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