Low temperature barriers for use with in situ processes
Patent
·
OSTI ID:988046
- Sugar Land, TX
- Bellaire, TX
A method of forming and maintaining a low temperature zone around at least a portion of a subsurface treatment area is described. The method includes reducing a temperature of heat transfer fluid with a refrigeration system. The heat transfer fluid is circulated through freeze well canisters and placed in a formation around at least a portion of the subsurface treatment area. An initial temperature of the heat transfer fluid supplied to a first freeze well canister is in a range from about -35 .degree. C. to about -55 .degree. C. At least one of the well canisters includes carbon steel. The heat transfer fluid is returned to the refrigeration system.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- ACO5-00OR22725
- Assignee:
- Shell Oil Company (Houston, TX)
- Patent Number(s):
- 7,546,873
- Application Number:
- 11/409,566; TRN: US201018%%221
- OSTI ID:
- 988046
- Country of Publication:
- United States
- Language:
- English
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