Downhole testing device casing pipe salvage tool

Provided is a downhole testing device casing pipe salvage tool. The downhole testing device casing pipe salvage tool comprises a joint, springs, a spring seat, a slip, an upper shell body, a lower shell body, a torsional spring, shafts, turning plates, a supporting seat, a dowel and a guide shoe. The downhole testing device casing pipe salvage tool is in a cone type hollow barrel structure, and is formed by the upper shell body, the lower shell body and the guide shoe in a threaded mode from top to bottom. The slip, the spring seat and the spring are installed inside the upper body from bottom to top, and the joint is connected with the upper end of the upper shell body in a threaded mode. Each of the two shafts which are arranged in a symmetrical mode is provided with a torsional spring and a turning plate with teeth, and the torsional spring and the turning plate are connected with the upper end of the annular supporting seat in a hinge mode, the supporting seat is fixed in the middle of the lower shell bod