DEVICE FOR DOWNHOLE HYDRAULIC MINING OF MINERALS Russian patent published in 2022 - IPC E21C45/00 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in downhole hydraulic mining of minerals, in particular, from thin productive strata. A device for downhole hydraulic mining of minerals is installed in a well, the wellbore of which is blocked by a casing string that performs the functions of a slurry-lifting string. On the upper sleeve of the casing there is a head in the form of a tee. Inside the head, external air supply and internal water supply columns are coaxially installed, the upper ends of which are tied by means of a manifold with outlets for supplying water and air. A sealing assembly is placed on the head, and a stuffing box assembly is placed on the manifold. An aerating assembly is installed at the lower end of the air supply column, and a swivel assembly, an extension cord and a jet head with destructive nozzles are attached to the lower end of the water supply column. The swivel assembly includes a Y-shaped tee with two inlet and outlet nozzles, a shaft with coaxial radial channels and a support heel. The inlet pipes are placed in the radial channels of the trunk. An extension is attached to the outlet pipe, which consists of jet pushers installed in alternating order and hose sections with nipple clips. The jet pusher includes a housing, a rotor and an injector. The rotor is mounted in a housing on bearings with the possibility of free axial rotation. The injector fixed on the rotor is made with rotary and washing nozzles. The axes of the rotary nozzles are located in a plane perpendicular to the axis of the injector, tangentially with respect to its central axial channel. The axis of each flushing nozzle is located in the same plane with the axis of the injector and forms an angle with it β=15-45°. The hose section consists of high-pressure hoses of the same length, intertwined in a braid. The ends of the hose section are equipped with nipple clips, additionally interconnected by a flexible rod.

EFFECT: improving the performance and reliability of the device.

1 cl, 8 dwg