FIELD: well drilling. SUBSTANCE: invention is designed for measurement of bottom-hole parameters in the course of well drilling in shielding beds with high conductivity. Bottom-hole telemetering system has surface receiving and processing equipment, bottom-hole instrument with transducer and transmitter, electric generator, main electric separator fulfilling the function of dipole formed as a result of electrical separation of drill string and cable section. Installed in drill string is at least one additional separator located above shielding bed. Electric generator has connectors from two sides. One connector serves for connection with bottom-hole instrument, and the other one, for connection with joining unit. Transit wires run inside bottom-hole instrument and electric generator. Joining unit ensures sealing of electric generator cavity and reswitching of transmitter signal from main electric separator to additional separator when cable section lug enters and gate locked in joining unit and cable lug is connected to transit wires. EFFECT: improved serviceability and performance of bottom-hole telemetering system in shielding beds with high conductivity. 2 dwg
