04344485 is referenced by 157 patents and cites 14 patents.

A thermal method is disclosed for recovering normally immobile oil from a tar sand deposit. Two wells are drilled into the deposit, one for injection of heated fluid and one for production of liquids. Thermal communication is established between the wells. The wells are operated such that heated mobilized oil and steam flow without substantially mixing. Oil drains continuously by gravity to the production well where it is recovered.

Title
Method for continuously producing viscous hydrocarbons by gravity drainage while injecting heated fluids
Application Number
6/162720
Publication Number
4344485
Application Date
June 25, 1980
Publication Date
August 17, 1982
Inventor
Roger M Butler
Calgary
CA
Agent
Michael A Nametz
Assignee
Exxon Production Research Company
TX, US
IPC
E21B 43/26
E21B 43/24
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