DEFLECTOR OF DRILL TOOL Russian patent published in 1996 - IPC

FIELD: well drilling. SUBSTANCE: deflector has three sections skewed in one plane. Alpha angle is formed by skewing two lower sections. The angle presets deflection. The angle may be increased by a value that does not exceed arcsin D₉-d_s/L_m.ss,, and two upper sections may be swan about their common axis to opposite directions and form functional additional angle β and additional transport angle g that is more of equal to arcsin D₉-d_s/L_m.ss,, where D_b if bit diameter, d_s is section diameter, L_m.s is middle section length. Deflector provides possibility to increase preset angle maintained capacity of the deflector through rectangular well shaft in transport position. EFFECT: high capacity.