TURBODRILL Russian patent published in 1997 - IPC

FIELD: mining, turbodrills designs for boreholes drilling in particular. SUBSTANCE: turbodrill has hollow body with thread adapter in its upper part and with nipple in its lower part, mounted in body cavity shaft with upper and lower fitting surfaces separated by its widened middle part and with made in its lower part axial canal and in its widened part - radial canals, cavities of which are communicated with cavity of axial canal; multistage turbine, rotors of which are fixed on upper fitting surface and stators - in body; bottom packer; radial supports, one of which is mounted on lower fitting surface; axial support. Bottom packer and axial support are located on lower fitting surface. Nipple is made in the form of cap, in cavity of which there are axial support, radial supports and bottom packer. EFFECT: improved design. 2 cl, 1 dwg