Angle-adjustable riser windowing and deflecting device and windowing and deflecting process

The invention discloses an angle-adjustable riser windowing and deflecting device and a windowing and deflecting process. The device comprises a pre-windowing riser guide shoe, a whipstock is installed in the pre-windowing riser guide shoe, and the pre-windowing riser guide shoe is matched with a key groove in the lower portion of the whipstock. A whipstock water channel is axially formed in the center of the whipstock, the upper end of the whipstock water channel is connected with the releasing tool, and the lower end of the whipstock water channel is connected with the hydraulic sprayer; a plurality of hydraulic jet holes penetrating through the side wall of the whipstock are formed in the lower part of the whipstock; and a plurality of flow guide grooves are formed in the outer wall of the whipstock. The angle of the whipstock can be adjusted to be consistent with the pre-windowing direction of the riser, silt in the riser can be cleaned and the whipstock can be mounted through one-time drilling, the windo