Device and method for transmitting information by electromagnetic waves
US5945923A · kind A · utility
51Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device and method for transmitting information between a well bottom and the surface by means of electromagnetic waves. The device includes transmitting information on either side of a valve (9) placed in a string of pipes (4) in a well by means of two electromagnetic wave transmitter-receiver unit (1, 2) placed on either side of the valve. In the device, unit (2) placed above valve (9) is lowered by means of logging type cable (3) into inner space of pipes (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.