04434849 is referenced by 63 patents and cites 11 patents.

Improved methods and apparatus are provided for recovering high viscosity oils from a sub-surface earth formation utilizing horizontal well apparatus. A plurality of horizontal drill holes extend from a large diameter vertical shaft hole into the formation of interest. Steam may be injected into the formation through selectively placed conventional vertical wells terminating within the oil-bearing formation, while oil is recovered from the lateral drill holes. A noncondensible gas or cold water may be injected into the formation subsequent to steam injection to enhance the overall recovery of oil.

Title
Method and apparatus for recovering high viscosity oils
Application Number
940390
Publication Number
4434849
Application Date
February 9, 1981
Publication Date
March 6, 1984
Inventor
Joseph C Allen
Bellaire
TX, US
Agent
Bard Groves Sroufe Bishop & Berger
Assignee
Heavy Oil Process
TX, US
IPC
E21B 47/00
E21B 43/24
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