Push type rotary guide drilling system

A push type rotary guide drilling system, comprising a drill bit and a rotating shaft which is configured to drive the drill bit to rotate and includes an upper rotating shaft and a lower rotating shaft connected to the drill bit, the system further comprising:

• a steering portion, sleeving outer sides of the upper rotating shaft and the lower rotating shaft;
• a push assembly, arranged at one end, proximal to the drill bit, of the steering portion and comprising a plurality of push pieces spaced along a circumferential direction of the steering portion;
• a transmission device, comprising transmission mechanisms which are in one-to-one correspondence to the push pieces for driving the push pieces to move to extend out of the steering portion, wherein each of the transmission mechanisms comprises a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear driven by the driving electromagnetic gear to rotate and arranged on the steering portion, the transmission mechanism further comprises a motion conversion unit arranged on the steering portion, and the motion conversion unit is suitable for converting rotary motion of the driven electromagnetic gear into linear motion of the push pieces;
• and
• a control unit arranged on the upper rotating shaft, wherein the control unit is electrically connected to the driving electromagnetic gear and is configured to modulate a magnetic field to make the driving electromagnetic gear and the driven electromagnetic driven gear realize linkage through magnetic coupling and make the driving electromagnetic gear and the driven electromagnetic driven gear operate in a transmission ratio.