FIELD: directed drilling.
SUBSTANCE: method of drill bit deviation for rotary drilling includes stages, at which direction is taken to target in formation for deviation of bit for rotary drilling during well borehole drilling in formation, opening at the first angular position of the deflecting device located near the bit for rotary drilling in the wellbore, the first inlet of the first flow rate control, wherein first inlet opening, when opened, provides movement of first amount of drilling mud of first deflection device from plurality of deflectors of deflecting device from normal position to extended position, wherein the first deflecting device in the extended position is in contact with the formation restricting the wellbore; closing after first angular position of deflecting device first inlet hole, wherein first inlet hole in closed position stops supply of first amount of drilling fluid to first deflecting device and provides return of first deflecting device to normal position; and a second amount of drilling fluid is supplied to the second flow rate regulator of the deflecting device, wherein the second amount of drilling fluid passes to the first deflecting device when the first flow rate regulator is closed. Part of the first amount of the drilling fluid passes through the first deflecting device into the wellbore when the first inlet opening is open, part of the second amount of the drilling fluid passes through the first deflecting device into the well shaft when the first inlet hole is closed, and the first deflecting device in contact with the formation, when deflecting device occupies first angular position, deflects bit for rotary drilling in direction to target.
EFFECT: efficient control of the direction in which the drill bit deviates during operation.
20 cl, 15 dwg
