METHOD FOR WELL EXTRACTION OF HARD MINERAL RESOURCES AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes driving of forwarding well, expansion of said well, insertion of working means into rocks of productive bed, drilling out of rocks by reciprocal drive of working means and extraction of drilled out rocks in form of hydromix onto surface. Firstly, drilling is performed up in a slanting manner down to ceiling of productive bed, then productive bed is penetrated up to its middle by means of a tool with cylindrical headpiece reinforced with cutters, on the next stage slanting portion of well is hollowed out into horizontal form by a working means with a headpiece of spherical form reinforced with cutters, by forcing it to rotate and swing within limits of 0° to 2°. Then, extraction is performed inside productive bed by a working means in form of truncated cone, with repeat of productive bed terrain shape relatively to the horizon, after which rocks in productive bed are drilled. For this working means in form of expander with retracted blades reinforced with cutters is inserted into forwarding well drilled inside productive bed, up to pit-face, then by means of hydraulic force blades are expanded and concurrently expander is rotated. Then drilling of bed is performed by means of fully opened blades. Device has changeable working means made for possible connection to drilling pipes for drilling of slanting well portion, for hollowing out of slanting portion into horizontal, for extracting horizontal portion of well in productive bed and a changeable expander.

EFFECT: broader functional capabilities for extracting mineral resources in beds of varying hardness category and geological complication.

2 cl, 9 dwg