Ishmurzin et al., "Experimental Use of Temporary Packing Spheres for Separate Treatment of Zones in Water Injection Wells", Nauch. Tech. SB. Ser. Neftepromyelovoe Delo, No. 9, pp. 14-16, 1969. |
Brown, R. W. et al., "Stimulation Treatment Selectivity Through Perforation Ball Sealer Technology", The Petroleum Engineer, Jun. 1959. |
Howard, E., "Ball Sealers in Fracturing and Acidizing", Canadian Oil and Gas Industries, pp. 43-46, Jan. 1962. |
Neill, G. H. et al., "An Inexpensive Method of Multiple Fracturing", Drilling and Production Practice, pub. by American Petroleum Institute, 1958, pp. 27-32. |
Permeator Corporation (Canada) Ltd., "Permeator Well Completion Operator's Manual", Revised Sep. 1967, copyright 1964. |
Dowell Data Sheets, Well Treatment Reports, TN-15-05-0325, TN-15-0328, TN-15-05-0361, TN-15-05-0363, TN-07-8599, TN-15-06-6566, TN-15-07-4378, TN-15-07-3654, TN-15-07-7917. |