Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent
1992-12-16
1994-11-08
Eldred, J. Woodrow
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
3408549, 3408558, 3408554, 3408555, 3408547, 166250, G01V 140
Patent
active
053630947
ABSTRACT:
Monitoring of an underground effluent deposit (2) and the exploration thereof are performed by installing various devices or user modules : reception arrays (Ri, Rj, Rk) such as geophones or hydrophones, condition sensors (C1, C2) , tools requiring electric power supply, etc, in various locations along one or several wells (1) drilled down into a formation, behind well casings or in the annular space between these casings and tubings, and by connecting these devices to a surface station (4), by means of a particularly simple and reliable multi-channel transmission unit. The surface station adapts the commands thereof according to the device to be controlled in return, of receiving all the signals they transmit whether analog or digital and coded, and adapts to several modes of allocation of the transmission channels. With such a system, long-duration monitoring operations may be carried out on a large scale under satisfactory economic conditions.
REFERENCES:
patent: 4189705 (1980-02-01), Pitts, Jr.
patent: 4337653 (1982-07-01), Chauffe
patent: 4355310 (1982-10-01), Belaigues et al.
patent: 4408307 (1983-10-01), Harris
patent: 4794534 (1988-12-01), Millheim
Beauducel Claude
Cretin Jacques
Lepage Thierry
Staron Philippe
Eldred J. Woodrow
Institut Francais du Pe'trole
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