E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/35
E21B 43/24 (2006.01) E21B 43/17 (2006.01) E21B 43/30 (2006.01)
Patent
CA 1057190
ABSTRACT OF THE DISCLOSURE Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid in a flow path within the formation but out of direct contact with the viscous petroleum; thus a solid-wall, hollow tubular member in the formation is used for conducting hot fluid to reduce the viscosity of the petroleum to develop a potential passage in the forma- tion outside the tubular member into which a drive fluid is injected to pro- mote movement of the petroleum to a production position. This application is related to our copending application Serial No. 261,565, filed September 21, 1976, for "Method of recovering Viscous Petroleum from an Underground Formation", application Serial No. 261,659, filed September 21, 1976, for "Method of Recovering Viscous Petroleum from Tar Sand"; application Serial No. 261,656 filed September 21, 1976, for "Recovering Viscous Petroleum from Thick Tar Sand"; application Serial No. 261,814, filed September 22, 1976, for "System for Recovering Viscous Petroleum from Thick Tar Sand"; and application Serial No. 261,819, filed September 22, 1976, for "Method of Recovering Viscous Petroleum from Thick Tar Sand".
261565
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