Transmission of data in boreholes
US6912177B2 · kind B2 · utility
84Cited by
11References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C23/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Data is transmitted along a borehole containing a drill stem (2) by means of a transmitter (6) which converts electric data signals to acoustic signals propagating along the drill stem (2). The acoustic signals are converted back to electric form by a receiver (12) which also processes the signals. In the preferred form the signals are stored in a receiver memory (15) for subsequent retrieval using a pick-up tool (5) lowered into the borehole. The system is particularly useful in moving data past an obstruction such as a shut-in valve (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.