| 发明名称 |
Insulating and electrode structure for a drill string |
| 摘要 |
An insulating and electrode structure for a drill string is presented. The drill string includes a drill string segment having a recess along an axial length thereof. The recess has a band of elastomeric nonconductive material therein which receives electrodes comprised of rings of conductive elastomeric material.
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| 申请公布号 |
US4575681(A) |
申请公布日期 |
1986.03.11 |
| 申请号 |
US19850727362 |
申请日期 |
1985.04.25 |
| 申请人 |
TELECO OILFIELD SERVICES INC. |
发明人 |
GROSSO, DONALD S.;HELM, CHARLES W. |
| 分类号 |
E21B17/00;E21B47/12;G01V3/20;(IPC1-7):G01V3/20;E21B49/00 |
主分类号 |
E21B17/00 |
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