Open surface flotation method

Details Open surface flotation method Open surface flotation method

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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patent: 4101172 (1978-07-01), Rabbitts
patent: 4133384 (1979-01-01), Allen et al.
patent: 4166504 (1979-09-01), Brown et al.
patent: 4181362 (1980-01-01), Burton

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