DOWNHOLE ELECTROMAGNETIC TELEMETRY REPEATER Russian patent published in 2022 - IPC E21B47/12 

FIELD: downhole electromagnetic telemetry repeaters.

SUBSTANCE: nvention relates to downhole electromagnetic telemetry repeater. The repeater includes a receiver transformer and a transmitter transformer, the windings of which are placed on a common toroidal core, an input voltage limiter, a series-connected amplifier, an analog-to-digital converter, a comb filter, a direct Fourier transform unit, a multiplier, an inverse Fourier transform unit, a comparator, a decoder, a modulator, as well as a random access memory and a power amplifier loaded on the transmitter transformer.

EFFECT: invention provides the possibility of reliable operation of telemetry in adverse geoelectrical conditions, the possibility of increasing the speed of information transmission through the use of carrier frequencies up to 1000 Hz, in the design of repeaters that do not require electrical separation of the drill string, does not reduce its mechanical strength and does not increase the risk of accidents.

1 cl, 3 dwg