FIELD: drilling equipment, particularly means for transmitting measuring-signals from the well to the surface.
SUBSTANCE: method involves receiving and transmitting coded electric signals through closed loop defined by drilling string and drilling mud in hole annuity of the well. Antennas are installed on outer drilling string surface and are made as coils wound on toroidal cores and arranged at well bottom and head correspondingly.
EFFECT: increased efficiency.
3 dwg
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