| 发明名称 |
EARTH BORING BIT WITH WEAR RESISTANT BEARING AND SEAL |
| 摘要 |
A roller cone bit is provided that includes a wear resistant coating applied to a bearing shaft, which is attached to a roller cone. The wear resistant coating can be a tungsten/tungsten carbide composite applied by chemical vapor deposition. |
| 申请公布号 |
EP2271816(A1) |
申请公布日期 |
2011.01.12 |
| 申请号 |
EP20090729054 |
申请日期 |
2009.04.02 |
| 申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
DICK, AARON, J.;LIN, CHIH, C. |
| 分类号 |
E21B10/22;E21B10/50;F16C33/10 |
主分类号 |
E21B10/22 |
| 代理机构 |
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代理人 |
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