Communications: electrical – Wellbore telemetering or control – In horizontal or inclined passage arrangement
367 81, 174115, 333243, G01V 140, H01P 306
A system is provided for transmitting signals between a sensor assembly contained in one or more well probes lowered into a well at the end of a cable and a surface control and recording unit. The cable includes a central line surrounded by several other lines and an external metal sheath. The transfer of data from the reception assembly to the surface installation is provided by applying suitably coded signals between the central conductor and the external sheath. A considerable increase in the transmission flow rate of the cable is obtained.
patent: 3514750 (1970-05-01), Pritchett et al.
patent: 3773109 (1973-11-01), Eberline
patent: 4028660 (1977-06-01), Pitts, Jr.
patent: 4592033 (1986-05-01), Dennis
patent: 4770034 (1988-09-01), Titchener et al.
Institut Francais du Pe'trole
Lobo Ian J.
Tarcza Thomas H.
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