05040605 is referenced by 11 patents and cites 9 patents.

A method and apparatus are provided for the recovery of a heavy oil, contained in an outcropping formation, without any significant adverse environmental impact. Broadly, the invention comprises indirectly heating an oil containing formation to reduce the viscosity of the oil therein and concurrently thermally insulating an upper portion of the well, extending into the formation, to eliminate any increased seepage of oil from the formation to the surface.

Title
Oil recovery method and apparatus
Application Number
7/546518
Publication Number
5040605
Application Date
June 29, 1990
Publication Date
August 20, 1991
Inventor
William E Showalter
Long Beach
CA, US
Agent
Clark E De Larvin
Gregory F Wirzbicki
Assignee
Union Oil Company of California
CA, US
IPC
E21B 43/24
E21B 36/00
View Original Source