发明名称 |
Low temperature barriers for use with in situ processes |
摘要 |
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 ° C. to about -55 ° C. At least one of the well canisters includes carbon steel. The heat transfer fluid is returned to the refrigeration system.
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申请公布号 |
US7546873(B2) |
申请公布日期 |
2009.06.16 |
申请号 |
US20060409566 |
申请日期 |
2006.04.21 |
申请人 |
SHELL OIL COMPANY |
发明人 |
KIM DONG SUB;VINEGAR HAROLD J. |
分类号 |
E21B36/00;E21B43/24;E21B43/30 |
主分类号 |
E21B36/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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