Hydraulic diameter-variable stabilizer with more than three variable diameters

The utility model discloses a hydraulic diameter-variable stabilizer with more than three variable diameters. The hydraulic diameter-variable stabilizer comprises a body 1, and an upper mandrel 2 arranged in a hole in the upper end of the body. The upper mandrel is connected with a lower mandrel 9, and a return spring 4 is arranged outside the upper mandrel. The body is provided with a set of spiral wings 20, and each spiral wing is provided with a set of circular holes. A correcting block 8 is arranged in each circular hole, and the bottom of the correcting block is in sliding connection with a set of inclined surface body 7 sleeved over the upper mandrel. The lower mandrel is sleeved by a rotary sleeve 12 and a sliding sleeve 13, and the rotary sleeve and the sliding sleeve are sleeved by an outer sliding sleeve 14. A displacement spring 15 is arranged between the outer sliding sleeve and the sliding sleeve. Opening and closing of a slurry pump changes the correcting size of the stabilizer, thereby satisfying the requirements of changing the borehole track of a drilling well, and improving the control precision of the borehole trace. The work efficiency of oriented wells and the horizontal wells is improved, and the trip frequency is reduced. Drill stuck accident due to change of well diameter is reduced. When the depth of a keyway is changed, more variable diameters can be processed.