EP 0314654 B1 19920108 - METHOD AND APPARATUS FOR TRANSMITTING DATA TO THE SURFACE FROM AN OIL WELL
Title (en)
METHOD AND APPARATUS FOR TRANSMITTING DATA TO THE SURFACE FROM AN OIL WELL
Publication
Application
Priority
NO 874428 A 19871023
Abstract (en)
[origin: EP0314654A1] Method and apparatus for transmitting measuring data to the surface from a oil well, where electromagnetic signals are cyclic transmitted a clock activated transmitting unit in the oil well, the signals comprising data for registrated parameters, using the casing of the oil well as transmission line, up to a receiver unit arranged at the upper end of the oil well, which receiver unit is activated by a receiver clock synchronized by the transmitter clock, for receiption corresponding to the cyclic activation of the transmitter, and where the signals received by the receiving unit are filtered for electromagnetic noise and the filtered signals are transmitted from the receiver unit to a receiving unit activated in a corresponding cyclus and arranged on the surface.
IPC 1-7
IPC 8 full level
E21B 47/12 (2012.01)
CPC (source: EP)
E21B 47/13 (2020.05)
Designated contracting state (EPC)
ES FR GB GR IT NL
DOCDB simple family (publication)
EP 0314654 A1 19890503; EP 0314654 B1 19920108; ES 2029077 T3 19920716; NO 163578 B 19900312; NO 163578 C 19900620; NO 874428 D0 19871023; NO 874428 L 19890424
DOCDB simple family (application)
EP 88850358 A 19881021; ES 88850358 T 19881021; NO 874428 A 19871023