METHOD AND DEVICE FOR DRILLING WITH SIMULTANEOUS FIXATION OF WELLS Russian patent published in 2009 - IPC E21B7/20 E21B4/04 

FIELD: mining engineering.

SUBSTANCE: proposed invention relates to mining and can be used for drilling of wells in loose rocks with simultaneous fixation by casing pipes. Method is based on simultaneous drilling, expansion and fixation of wells walls by casing pipes, by means of device it is drilled well for depth of casing pipe, after passing of well for full depth of casing pipe, outfitted by conical nozzle, it is lowered into drilled well, by means of what well is widen, after what it is connected top butt part of this casing pipe with bottom part of casing pipe, herewith axial load on well bottom is increased by means of weight of two casing pipes, drilling process for specified target well depth with widening of well's walls and its fixation is implemented with following casing pipes. Device for drilling with simultaneous fixation of wells, consisting screw core lifter with openings, implemented between bearing ribs, connected by bottom butt with crown, reducer with shaft, connected to motor axis, cable locker, connected to carrying cable, expansion unit, including solenoid, control rods, pivotally connected to it, herewith the second end of carrying cable is winded on winch barrel, which is outfitted by source of electric energy and electric motor, connected to reducer.

EFFECT: drilling of loose rocks with simultaneous fixation by casing pipes with usage of winch and carrying cable considerably reduces time for hoisting operations, and also reduces pecuniary costs at fixation of separate sections of tectonic malfunction, thief zones and show at high deeps.

2 cl, 2 dwg