E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/39
E21B 43/24 (2006.01)
Patent
CA 1141654
ABSTRACT OF THE DISCLOSURE The recovery of heavy crude oils and tars from sub- terranean oil bearing formations is enhanced by the injection of pressurized and heated hydrocarbon vapor into a single well drilled into the formation. Condensation of the hydro- carbon vapor heats the heavy oil and tars entrapped in the formation and dilutes the oil so as to decrease its viscosity and enhance its flow into a lower portion of the well. The oil and solvent collected are removed to the surface by pumping. The preferred hydrocarbon vapor is a low boiling fraction derived by distillation of the oil recovered from the formation, however, some stable externally-produced aromatic hydrocarbon vapors of high solvent power such as benzene or toluene or mixtures thereof may also be used and reclaimed from the oil by distillation. -21-
342784
Gowling Lafleur Henderson Llp
Hydrocarbon Research Inc.
LandOfFree
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