METHOD TO PRODUCE RARE METALS USING TECHNOLOGY OF DRILLHOLE IN SITU LEACHING AND DEVICE FOR ITS REALISATION Russian patent published in 2013 - IPC E21B43/28 

FIELD: mining.

SUBSTANCE: invention includes injection of working agent solutions into a payout bed via a system of injection wells and pumping of products of reaction of rare metals with a working agent solution with the help of a submersible pump via a system of production wells, exposure of well bore and crosshole space to the field of elastic oscillations with the help of sources of elastic oscillations. At the same time operation of the production well is stopped for 3-4 hours, the submersible pump is withdrawn, and a well source of elastic oscillations is lowered into the well on a single-strand geophysical cable. The source of elastic oscillations is a well radiator of plasma-impulse effect, creating impulses of elastic field with a spectrum of frequencies in the range from several Hertz to several kiloHertz and energy of elastic impulses in the range of 1.0-5-1.2 kJ, with series of 10÷30 pulses with frequency of 2÷3 pulses per minute, power supply is provided via a single-strand cable from a surface source of current with frequency of 300-1,000 Hz. In process of wells treatment the radiator is moved with a pitch of 0.5÷1.0 m in the entire interval of the well filter, and after its withdrawal from the well the pump is lowered, and the well operation is resumed.

EFFECT: invention makes it possible to reduce costs for performance of method realisation technology and to increase its efficiency, to reduce dimensions and to simplify device design for its realisation.

8 cl, 5 dwg