Increasing the stability of drilling tools of a ring type at the passing of exploration wells

Abstract

In this paper, the areas of rational use of hard-alloy and diamond drill bits for core selection in exploratory drilling are determined by comparative calculation of the cost of 1 m of a well drilled in the same mining and geological conditions by the mentioned tools. It is established that the most promising direction to increase the durability of carbide tools is the creation of a combined crown, in which the worn-out armament in the process of drilling is replaced with a new one without lifting the drilling tool to the surface.
In addition to the mentioned direction, the increase in the durability of diamond tools is also provided by the creation of multilayer drill bits whose matrix has a height of several impregnated diamond-containing layers of the «crested» profile, separated by non-smooth layers of lesser hardness