3880238 is referenced by 29 patents and cites 10 patents.

In a process for recovering shale oil by injecting and producing fluid into and out of a rubble-containing cavity in an otherwise substantially impermeable subterranean oil shale, the tendency for the flow path to become plugged is reduced by injecting both a hot solvent-fluid and a non-solvent-gas at rates correlated so that the cavern remains substantially free of liquid.

Title
Solvent/non-solvent pyrolysis of subterranean oil shale
Application Number
05/489,639
Publication Number
3880238
Application Date
July 18, 1974
Publication Date
April 29, 1975
Inventor
Closmann Philip Joseph
Tham Min Jack
Agent
Coryell Harold W
Assignee
Shell Oil Company
IPC
E21b 43/28
D21b 43/24
E21B 43/28
E21B 43/24
E21B 43/16
E21B 43/00
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