Low temperature barriers for use with in situ processes
    8.
    发明授权
    Low temperature barriers for use with in situ processes 有权
    用于原位过程的低温屏障

    公开(公告)号:US07546873B2

    公开(公告)日:2009-06-16

    申请号:US11409566

    申请日:2006-04-21

    IPC分类号: E21B36/00 E21B43/24 E21B43/30

    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.

    摘要翻译: 描述了在地下处理区域的至少一部分周围形成和保持低温区域的方法。 该方法包括用制冷系统降低传热流体的温度。 传热流体通过冷冻罐循环并且被放置在围绕地下处理区域的至少一部分的地层中。 提供给第一冷冻井罐的传热流体的初始温度在约-35℃至约-55℃的范围内。井筒中的至少一个包括碳钢。 传热流体返回到制冷系统。