| 发明名称 |
APPARATUS AND SYSTEM TO ALLOW TOOL PASSAGE AHEAD OF A BIT |
| 摘要 |
Drill bits enable the use of tools in a wellbore when it is undesirable or impossible to remove the drill bit. Drill bits include a drill bit insert, a latch assembly, a housing, a running tool, and a shaft trigger to operate the latch assembly. |
| 申请公布号 |
WO2012033741(A3) |
申请公布日期 |
2012.07.05 |
| 申请号 |
WO2011US50512 |
申请日期 |
2011.09.06 |
| 申请人 |
THRUBIT B.V.;WELLS, PETER;MACRAE, JONATHAN |
发明人 |
WELLS, PETER;MACRAE, JONATHAN |
| 分类号 |
E21B10/60;E21B10/62;E21B10/64;E21B21/10 |
主分类号 |
E21B10/60 |
| 代理机构 |
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代理人 |
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