DEVICE FOR TRANSMITTING INFORMATION FROM WELL Russian patent published in 2020 - IPC E21B47/12 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to logging during well drilling and is intended for transfer of information from well bottom part to surface via wireless communication channel. Disclosed is a device for transmitting information from a well, comprising an electric alternating current source connected to upper and lower parts of a pipe string, separated by a dielectric insert, and ground receiving-converting equipment, including voltage recorder. Current source is equipped with a modulation unit, and the receiving-converting equipment comprises a ground receiving coil with a magnetic conductor in the form of a hollow cylinder coaxially installed in the pipe string, the height of which considerably exceeds its thickness. External surface of pipes forming the column is coated with a coating of magnetically soft ferromagnetic material.

EFFECT: technical result is high level, reliability and speed of signal transmission.

1 cl