Wells – Processes – Heating – cooling or insulating
Patent
1989-12-08
1991-06-18
Neuder, William P.
Wells
Processes
Heating, cooling or insulating
166306, 166272, E21B 4324
Patent
active
050242750
ABSTRACT:
Production of viscous hydrocarbons is initiated by first injecting an injection fluid down at least two tubing strings in a wellbore having multiple tubing strings therein. Following an initiation phase, flow of injection fluid in the production tubing string is ceased, and production of formation fluid to the surface commenced in the heated tubing. The production of formation fluids is controlled, and entry of uncondensed steam from the formation into the wellbore avoided by maintaining a liquid level in the formation which is above the production perforations.
REFERENCES:
patent: 3349846 (1987-10-01), Trantham et al.
patent: 4700779 (1987-10-01), Huang et al.
Anderson Donald J.
Duerksen John H.
McCallum Doug J.
Petrick Mark
Chevron Research Company
Keeling Edward J.
Neuder William P.
Power David J.
Touslee Robert D.
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