| 发明名称 |
INSULATING A WELLBORE IN PERMAFROST |
| 摘要 |
A method and apparatus for maintaining at least a portion of the interior region of a wellbore thermally insulated from the wall of the wellbore wherein a single zone in the wellbore is utilized for the introduction, circulation, and return of cooling fluid.
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| 申请公布号 |
US3662832(A) |
申请公布日期 |
1972.05.16 |
| 申请号 |
USD3662832 |
申请日期 |
1970.04.30 |
| 申请人 |
ATLANTIC RICHFIELD CO. |
发明人 |
WILLIAM A. KEELER;FRANK J. SCHUH |
| 分类号 |
E21B33/10;E21B36/00;(IPC1-7):E21B43/24 |
主分类号 |
E21B33/10 |
| 代理机构 |
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代理人 |
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| 地址 |
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