METHOD OF BOREHOLE MINING OF SOLID MINERAL RESOURCES AND DEVICE FOR ITS IMPLEMENTATION

摘要

The invention relates to downhole production of solid minerals, particularly to their extraction in complex geological conditions x alternating thin layers of solid minerals and softer rock. The inventive method: pre-drilled wells extend jetting stream in the overburden of the producing formation, exposing the surface thereof, is mounted dilator after lifting the pipe string and deprotection jetting, embedded dissolved expander after lifting the pipe string and deprotection jetting, embedded by an expander in the productive bed rock on downhole, then drill out their return stroke of the working body. An apparatus for carrying out the method includes two coaxially disposed pipe string, the interior of which is intended for dispensing products onto the surface extraction, and the annular space between the tubes - for supplying the working fluid. The working body is made exchangeable as jetting. Housed in the housing device is provided additionally which expander is formed as a casing with pivotally mounted on it the cutting blades and the hollow stem. 4 yl. Yo