System for recovering viscous petroleum from thick tar sand

Details System for recovering viscous petroleum from thick tar sand System for recovering viscous petroleum from thick tar sand

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01) E21B 36/00 (2006.01)

Patent

CA 1060341

ABSTRACT OF THE DISCLOSURE SYSTEM FOR RECOVERING VISCOUS PETROLEUM FROM THICK TAR SAND Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path formed in a wall by concentric casing and tubular members extending from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the petroleum in the formation to develop a potential passage in the formation outside the flow path into which a drive fluid is injected to promote movement of the petroleum to the wall for production up a production flow line extending up the interior of the tubular member.

261814

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