05054551 is referenced by 220 patents and cites 8 patents.

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 with a hydrogen-containing gas and reduce viscosity of the petroleum to develop a potential passage in the formation outside the tubular member into which a drive fluid is injected to promote movement of the petroleum to a production position.

Title
In-situ heated annulus refining process
Application Number
7/562779
Publication Number
5054551
Application Date
August 3, 1990
Publication Date
October 8, 1991
Inventor
John H Duerksen
Fullerton
CA, US
Agent
Annette M McGarry
Edward J Keeling
Assignee
Chevron Research and Technology Company
CA, US
IPC
E21B 43/24
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