Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1979-09-13
1981-11-24
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
166265, 166272, 166303, E21B 4324, E21C 4110
Patent
active
043020518
ABSTRACT:
A method for the in situ separation of viscous crude oil from a reservoir such as, oil sand, or tar sand is disclosed. Hot water is introduced to the top surface of the reservoir while steam is injected into the reservoir through drill holes. The hot water and steam may contain a surfactant. The bouyancy of the crude oil creates an artificial water drive which causes the water and oil to "flip-flop" so that the oil rises to the top of the reservoir and separates from the remainder of the reservoir material. If the overburden is deep, underground mining techniques may be used to reach the reservoir prior to applying the present method.
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Bass Dan M.
Wang Fun-Den
Gardiner Donald A.
Novosad Stephen J.
Sadowsky Gersten
Suchfield George A.
The United States of America as represented by the Secretary of
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