APPARATUS FOR HYDRAULIC SURFACE-BOREHOLE MINERAL MINING Russian patent published in 2007 - IPC E21C45/00 

FIELD: hydraulic mineral mining, particularly downhole apparatus for hydraulic surface borehole mineral mining and for solid minerals removal from underground formations through boreholes.

SUBSTANCE: hydraulic surface-borehole mining apparatus comprises concentrically arranged outer pipe string, telescopic liner and central pulp discharge pipe string. Lower end of outer pipe string is provided with thrust ring. Upper part of telescopic liner has sealing collars and comprises pulp receiving windows and division chamber with orifices. The orifices are communicated with receiving chamber of hydraulic elevator and borehole bottom zone. Working liquid supply channels and flushing orifices are made in liner. Hydraulic monitor assembly is arranged in the liner. The hydraulic monitor is provided with nozzles, which washout rock from side part thereof. Hydraulic elevator having hydraulic elevation head, receiving chamber, mixer and diffuser is also installed in the liner. Diffuser of hydraulic elevator is linked with central pulp discharge pipe string. Adjustment pipe is connected to telescopic liner end by means of bayonet joint. The adjustment pipe is provided with sealing collar arranged in upper part thereof, with flushing windows formed in pipe center and with flushing orifice made in lower part thereof. The adjustment pipe has drill bit.

EFFECT: increased efficiency due to improved technological operations of borehole drilling and productive reservoir cutting.

6 dwg