EP 0399987 A1 1990-11-28 - Device and method for signal transmission in drill stems.
Device and method for signal transmission in drill stems.
Apparat und Verfahren zur Signalübertragung in Bohrgestängen.
Appareil et procédé pour transmettre un signal dans la tige de forage.
DE 3916704 A
Device for signal transmission in drill stems consisting of pipes (4), characterized in that the device comprises electrically interconnected induction loops (1) located in such a way that loops (1) of two pipes (4) between which the signal has to be transmitted are placed opposite each other and are coupled with a transformer coupling.
IPC 8 full level
Citation (search report)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE