DEVICE FOR WELL HYDRO-EXTRACTION OF SOLID MINERAL RESOURCES Russian patent published in 2007 - IPC E21C45/00 

FIELD: mining industry.

SUBSTANCE: device for well hydro-extraction of mineral resources includes concentrically mounted external pipes column, telescopic tail and central slurry outlet pipes column. Lower end of external column is provided with stopping ring. Telescopic tail in upper part is provided with compression glands and with rock-destroying tool in lower part. Telescopic tail has slurry-receiving windows and separating chamber with apertures for communication with receiving chamber of hydro-elevator device and face-adjacent well section. Telescopic tail includes channels for feeding working liquid and washing aperture. Inside telescopic tail, hydro-monitoring device with attachments for side washing of rock and hydro-elevator device, consisting of hydro-elevation attachment, receiving chamber, mixer and diffuser, connected to central slurry outlet pipes column, are positioned. Between telescopic tail and central slurry outlet pipes column, a hydro-elevator pipes column is concentrically mounted, lower end of which is rigidly held on telescopic tail and connected to its channels for feeding drilling mud. Lower end of tail is equipped with drilling bit.

EFFECT: increased efficiency of well hydro-extraction due to improvement of well-driving and bed-extracting technological operations.

7 dwg