| 发明名称 |
A METHOD FOR DRILLING WITH CASING |
| 摘要 |
A method for drilling boreholes using casing (16) as the drill string and for advancing a casing string toward the bottom of the borehole is described. In the method, the drilling assembly (26) is used as a guide over which the drill string (16) is advanced toward the bottom of the borehole prior to removing the drilling assembly from the wellbore.
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| 申请公布号 |
WO0194738(A1) |
申请公布日期 |
2001.12.13 |
| 申请号 |
WO2001CA00681 |
申请日期 |
2001.05.14 |
| 申请人 |
TESCO CORPORATION;ANGMAN, PER, G. |
发明人 |
ANGMAN, PER, G. |
| 分类号 |
E21B7/20;E21B10/66;E21B23/08;(IPC1-7):E21B7/20 |
主分类号 |
E21B7/20 |
| 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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