| 发明名称 |
DRILL STRING TOOL WITH BEARING SLEEVE |
| 摘要 |
A drill string tool such as a drill string stabiliser (1) comprises a circumferentially continuous bearing sleeve (6) having an outside diameter which is equal to or greater than the outside diameter of a radially outermost part of the drill string tool.
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| 申请公布号 |
CA2473424(C) |
申请公布日期 |
2011.09.20 |
| 申请号 |
CA20042473424 |
申请日期 |
2004.07.09 |
| 申请人 |
PILOT DRILLING CONTROL LIMITED |
发明人 |
SWIETLIK, GEORGE |
| 分类号 |
E21B17/10;E21B17/02 |
主分类号 |
E21B17/10 |
| 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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