Communications: electrical – Wellbore telemetering or control – In horizontal or inclined passage arrangement
Patent
1985-08-01
1987-08-25
Jordan, Charles T.
Communications: electrical
Wellbore telemetering or control
In horizontal or inclined passage arrangement
340857, G01V 100
Patent
active
046896201
ABSTRACT:
A method and an apparatus are provided for data transmission between a transceiver located in a drill hole and an above ground transceiver which are connected together by a two-wire line composed of an armoured, insulated copper core cable. The data are transmitted between the two transceivers via the two-wire line by successive, essential current-carrying time intervals. In the current-carrying time intervals, the portion of the transmitted energy is stored in the transceiver located in the drill hole, being stored therein for the current-free time intervals. The data are transmitted from the transceiver located in the drill hole to the transceiver disposed above ground by interrupting the current flow in the two-wire line or by short-circuiting the ends of the two-wire line, and are transmitted in the reverse direction by interrupt current feed of the two-wire line.
REFERENCES:
patent: 3374459 (1968-03-01), Rabson et al.
patent: 4360710 (1982-11-01), Chaput et al.
patent: 4603318 (1986-07-01), Philp
Diefenderfer, Principles of Electronic Instrumentation, .COPYRGT.1979, Saunders College Pub., pp. 89-90.
Eldred John W.
Jordan Charles T.
Schilling Mess und Regeltechnik Industrievertretungen
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