Device and method for transmitting information by electromagneti

Details Device and method for transmitting information by electromagneti Device and method for transmitting information by electromagneti

1997-07-01

1999-08-31

Horabik, Michael

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

3408545, 3408544, 3408549, 3408551, 175 40, G01V 300

Patent

active

059459239

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).

REFERENCES:
patent: 3967201 (1976-06-01), Rorden
patent: 4093936 (1978-06-01), Eberline et al.
patent: 5163714 (1992-11-01), Issenman
patent: 5394141 (1995-02-01), Soulier
patent: 5396232 (1995-03-01), Mathieu et al.
patent: 5512889 (1996-04-01), Fletcher

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