1
John H Duerksen: Method for in-situ heated annulus refining process. Chevron Research and Technology Company, Edward J Keeling, David J Power, September 8, 1992: US05145003 (238 worldwide citation)

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid and hydrogen-generating gas in a flow path within the formation; thus a solid-wall hollow tubular member in the formation is used for conducting hot fluid to promote hydrogenation in conjunction wit ...


2
John H Duerksen: In-situ heated annulus refining process. Chevron Research and Technology Company, Edward J Keeling, Annette M McGarry, October 8, 1991: US05054551 (220 worldwide citation)

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid and hydrogen-containing gas in a flow path within the formation; thus a solid-wall hollow tubular member in the formation is used for conducting hot fluid to promote hydrogenation in conjunction wit ...


3
John H Duerksen: Steam, noncondensable gas and foam for steam and distillation drive _in subsurface petroleum production. Chevron Research Company, G W Wasson, L S Gruber, Edward J Keeling, December 18, 1984: US04488598 (31 worldwide citation)

A method is disclosed for increased recovery of crude petroleum from a subsurface formation containing petroleum deposits. The method combines steam and gas distillation drive using foam to divert the steam/gas and to establish a thermal barrier against heat loss into the surrounding formations. A n ...


4
John H Duerksen, Robert G Wall, Jack D Knight: Steam injection including alpha-olephin sulfonate dimer surfactant additives and a process of stimulating hydrocarbon recovery from a subterranean formation. Chevron Research Company, S R LaPaglia, E J Keeling, A Stephen Zavell, December 3, 1985: US04556107 (29 worldwide citation)

An improved steam injection process for recovering hydrocarbons from a subterranean formation. The process includes the use of alpha-olefin sulfonate dimer surfactants in the steam to form a foam-steam drive medium which is injected into the formation through at least one injection well to enhance t ...


5
John H Duerksen, Robert G Wall, Jack D Knight: Alpha-olefin sulfonate dimer surfactant cyclic steam stimulation process for recovering hydrocarbons from a subterranean formation. Chevron Research Company, S R LaPaglia, E J Keeling, A Stephen Zavell, August 26, 1986: US04607700 (27 worldwide citation)

An improved cyclic steam injection process for recovering hydrocarbons from a subterranean formation. The process includes the use of alpha-olefin sulfonate dimer surfactants in the steam to form a foam-steam drive medium which is injected into the formation through an injection well to enhance the ...


6
John H Duerksen, Donald J Anderson, Doug J McCallum, Mark Petrick: Single well injection and production system. Chevron Research and Technology Company, Edward J Keeling, David J Power, July 21, 1992: US05131471 (22 worldwide citation)

A method is disclosed for fluid injection and oil production from a single wellbore which includes providing a path of communication between the injection and production zones.


7
John H Duerksen, Robert G Wall, Jack D Knight: Non-condensible gas injection including alpha-olefin sulfonate dimer surfactant additives and a process of stimulating hydrocarbon recovery from a subterranean formation. Chevron Research Company, D A Newell, E J Keeling, A Stephen Zavell, March 18, 1986: US04576232 (20 worldwide citation)

An improved non-condensible gas injection process for recovering hydrocarbons from a subterranean formation. The process includes the use of alpha-olefin sulfonate monomer and alpha-olefin sulfonate dimer surfactants along with the gas to form a gas-foam drive medium which is injected into the forma ...


8
John H Duerksen, Robert G Wall, Jack D Knight: Non-condensible gas injection including alpha-olefin sulfonate surfactant additives. Chevron Research Company, S R LaPaglia, E J Keeling, A Stephen Zavell, February 25, 1986: US04572294 (15 worldwide citation)

An improved non-condensible gas injection process for recovering hydrocarbons from a subterranean formation. The process includes the use of alpha-olefin sulfonate surfactants along with the non-condensible gas to form a gas-foam drive medium which is injected into the formation through at lest one ...


9
John H Duerksen: Single well injection and production system. Chevron Research Company, Edward J Keeling, Robert D Touslee, David J Power, May 14, 1991: US05014787 (12 worldwide citation)

A method is disclosed for fluid injection and oil production from a single wellbore which includes providing a path of communication between the injection and production zones.


10
Donald J Anderson, John H Duerksen, Doug J McCallum, Mark Petrick: Method of recovering hydrocarbons using single well injection/production system. Chevron Research Company, Edward J Keeling, David J Power, Robert D Touslee, June 18, 1991: US05024275 (12 worldwide citation)

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 f ...



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