04037658 is referenced by 173 patents and cites 9 patents.

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid in a flow path within the formation but out of direct contact with the viscous petroleum; thus a solid-wall, hollow tubular member in the formation is used for conducting hot fluid to reduce the 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
Method of recovering viscous petroleum from an underground formation
Application Number
5/627304
Publication Number
4037658
Application Date
October 30, 1975
Publication Date
July 26, 1977
Inventor
Donald J Anderson
Newport Beach
CA, US
Agent
Edward J Keeling
R L Freeland Jr
Assignee
Chevron Research Company
CA, US
IPC
E21B 43/24
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