| 发明名称 |
Surface modifications for rotary drill bits |
| 摘要 |
A rotary-type drill bit for drilling subterranean formations having areas or components having surfaces exhibiting a relatively low adhesion, preferably nonwater-wettable, surface over at least a portion thereof.
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| 申请公布号 |
US6450271(B1) |
申请公布日期 |
2002.09.17 |
| 申请号 |
US20000621064 |
申请日期 |
2000.07.21 |
| 申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
TIBBITTS GORDON A.;SCOTT DANNY E.;OVERSTREET JAMES L.;KOLTERMAN TERRY J.;LIN CHIH;OXFORD JAMES ANDY;RADFORD STEVEN R. |
| 分类号 |
E21B10/52;E21B10/56;E21B10/567;(IPC1-7):E21B10/00 |
主分类号 |
E21B10/52 |
| 代理机构 |
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