Toroidal coupled telemetry apparatus
US4725837A · kind A · utility
47Cited by
7References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole toroidal coupled telemetry apparatus is disclosed in which the secondary winding comprises a plurality of turns wrapped around a generally annular core member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.