Intelligent drift diameter gauge

The invention relating to the field of oil well equipment discloses an intelligent drift diameter gauge. The existing drift diameter gauge is designed to be a split equal-diameter deformable drift diameter gauge, so that a drilling clamp accident caused by the deformation and diameter reduction of the casing pipe is avoided. In the prior art, the existing cylinder has an enclosed top end and the open bottom; and according to the intelligent drift diameter gauge, the cylinder has an open top end and an enclosed bottom end, so that the tool has the sedimentation cup function, so that the drilling clamping accident caused by the fallen object is avoided. A phenomenon that the drilling is stuck in the drilling work due to fallen object accumulation and deformation and diameter reduction of thecasing pipe during the working process is avoided. The risk quality accident of the well repairing and ventilation procedure for underground work is reduced; and the construction efficiency of the well operation is improved.