TURBO-DRILL Russian patent published in 2001 - IPC

FIELD: equipment drilling deep boreholes. SUBSTANCE: turbo- drill for deep boreholes has body-rotor in which rotor stages of pressure of turbine, rotor members of radial supports and rotor members of axial thrust are anchored fixedly. Stator stages of pressure, stator members of radial supports, stator members of axial thrust and lantern are fixed on axle of turbo-drill with the help of nut-adapter. Core-taking body is joined to lower thread of adapter and core-forming bit is attached to lower thread of core-taking body. Internal drill bit is linked to lower thread of nut- adapter. Axle of turbo-drill is attached with its upper end to lower pipe of drill pipe string. EFFECT: increased efficiency and productivity of drilling thanks to enhanced speed of rotation of core-forming bit. 4 cl, 2 dwg