DOWNHOLE WIRELESS TRANSMISSION SYSTEM Russian patent published in 2020 - IPC E21B47/16 

FIELD: soil or rock drilling; mining.

SUBSTANCE: present invention relates to a well transmission system for transmitting signals and/or energy. Disclosed is a downhole system for wireless transmission of signals and/or energy, comprising a production casing located in a wellbore and forming an annular space between them, wherein the production casing string has an inner surface and an outer surface, a downhole tool comprising a first ultrasonic transceiver, and a second ultrasonic transceiver connected to the outer surface of the production casing, wherein the tool comprises a retractable means for contacting the first ultrasonic transceiver with the inner surface of the production casing so as to enable transmission of signals through the production casing and/or energy by means of ultrasonic waves between the first and second ultrasonic transceivers. Ultrasonic waves have a frequency in range of 100–500 kHz, preferably in range of 125–400 kHz, more preferably in range of 150–400 MHz. Present invention also relates to a method for wireless transmission of signals and/or energy in a downhole wireless transmission system according to the present invention.

EFFECT: technical result is improved quality of signal transmission regardless of composition of fluid medium in well.

18 cl, 11 dwg