Borehole path controller

The utility model relates to a borehole path controller for a directional well and a vertical shaft in the well drilling process of oil field, which is composed of a main body (1), an outer sleeve (2), a rolling bearing (3), a sliding cutter (5) with double edges, a center pipe (9), a water plug (10), etc. The borehole path controller can be used for doing directional deflection or position twisting for the directional well, and can also do the deviation correction for the vertical shaft. The borehole path controller is directly connected with a drilling bit and is arranged in a non-magnetic drill collar in normal drilling. When the drilling bit drills to a directed section, the borehole path controller can directly deflect in direction; after the direction is set, the drilling bit continuously drills. When a borehole track deviates from a designed orbit, the borehole path controller can also correct the borehole track on time. Each directional well at least reduces twice trips. The utility model is not affected by well depth and stratum.