FIELD: mining. SUBSTANCE: device has a drive, drill string with axial and side channels and sludge taking apertures, pilot-bit, expander and auger-type transporter placed on outer surface of drill string between pilot-bit and expander. Transporter blade has winding directed opposite to drill string rotation, Sludge taking apertures are placed between pilot- bit and transporter and made in the form of pipes installed radially. Cavity of the pipes is open to axial channel cavity and insulated from side channel cavity. Transporter may be multi-blade, sludge taking apertures may be originated at different levels under each blade. Besides, the transporter is provided with additional blade placed between pilot-bit and main blade. EFFECT: higher efficiency. 5 cl, 5 dwg
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