TELEMETRICAL SYSTEM WITH COMBINED CABLE-FREE CONNECTION CHANNEL FOR DATA TRANSMISSION IN PROCESS OF DRILLING WELLS Russian patent published in 2018 - IPC E21B47/12 E21B47/125 E21B47/20 

FIELD: electricity.

SUBSTANCE: telemetric system contains installed in the top of the column of drill pipe transmitting module that generates flush fluid pressure pulses to transmit information on the hydraulic communication channel, a separate module of electric separator, power supply unit, measuring unit and transmitting unit used to transfer information on electromagnetic communication channel, installed in housing of separate downhole telemetric module - DTM in composition of bottom part of the drill string, as well as ground equipment with a reception device, connected to the antenna and the flush fluid pressure sensor installed in the discharge line of flush fluid. Wherein, the electrical separator is installed between the housing of the above-mentioned DTM and a transmitting module that generates flush fluid pressure pulses for transmitting information on the hydraulic communication channel. Said transmitting module is connected to the power supply unit by a cable section, one core of which is connected to an electrical contact at the top of the drill string. In addition, the cable section is passed inside the central channel of the electrical separator, the inner wall of which is covered with an insulating layer.

EFFECT: increase the reliability and accuracy of downhole data transmission and increase the power and range of communication.

7 cl, 2 dwg