Calibrator-expander is designed for processing and calibrating the walls of the well, in order to prevent possible complications during the descent of the casing string.

Eccentric calibrator allows to work through the well in places of its narrowing more than the nominal diameter, thanks to the non-standard eccentric shape of the blades.

The calibrator with spiral blades is designed for centering the drilling tool in the well and calibrating the walls of the well during drilling, as well as during repair work in oil, gas and exploration wells.