DOWNHOLE TELEMETRY SYSTEM WITH ABOVE-BIT UNIT AND METHOD FOR WIRELESS TRANSMISSION OF DATA THEREOF TO EARTH'S SURFACE Russian patent published in 2015 - IPC E21B47/12 

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a method for wireless transmission to the earth's surface of data of a base telemetry system with an above-bit unit, which includes measuring downhole parameters, encoding and transmitting signals by emission thereof with an electrode into the rock via a high-speed wireless electromagnetic link, receiving said signals with a base telemetry system and transmitting to the surface through an electrical divider of the base telemetry system. An additional electrical divider is placed in the immediate vicinity of the above-bit unit, said divider having a key element controlled by the base telemetry system and being used to receive signals emitted by the electrode of the above-bit unit. Dipole electrodes are opened when receiving signals with the key element and said electrodes are closed when the base telemetry system transmits signals through the key element. In the disclosed device, dipole electrodes of the main divider are connected to a transmitting unit and dipole electrodes of the additional divider are connected to receiving unit of the base telemetry system.

EFFECT: high reliability of transmitting information data from a downhole unit to a downhole telemetry system and then to the earth's surface.

2 cl, 1 dwg