| 发明名称 |
Monitoring drill bit condition - by recording torque to weight ratio |
| 摘要 |
<p>System for use with roller cone cutter type bits develops a signal representing T/WD, where T is the torque, W is the weight and D is the bit dia., the signal exhibiting a characteristic increase upon incipient failure of the bit.</p> |
| 申请公布号 |
FR2251700(A1) |
申请公布日期 |
1975.06.13 |
| 申请号 |
FR19730040655 |
申请日期 |
1973.11.15 |
| 申请人 |
TEXACO DEVELOPMENT CORP,US |
发明人 |
|
| 分类号 |
E21B12/02;E21B45/00;(IPC1-7):21B13/00;01N3/58;01D1/16 |
主分类号 |
E21B12/02 |
| 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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