The relevance of the research is caused by the fact that nowadays it will be impossible to explore the georesources if we don’t provide the drilling operations. A great part of the drilling operation is provided with the aid of PDC-bits that beyond that are used for drilling for oil and gas follow-up production. Drilling bits maintenance support that is based on the timely drilling bit wear degree metering is an important well construction technical-and-economic values improving factor. One of the major problems in drilling bits operation is that the plates fail at different times that drives up the additional pulsation and as a result the increased boring tool load and bit breakages. Additionally it is obvious that under such conditions you have to service, restore and replace drilling bit platens more often. Near-equivalent drilling bit cutting plates lifetime providing makes it possible to extend the drilling bits operational life and cut the time for drilling bits maintenance operation due to PDC reconstruction and replacer. The main aim of the research is the near-equivalent drilling bit cutting plates lifetime providing for oil and gas exploration and oil-and-gas wells drilling productivity elevation. Objects of the research are the drilling bit loading, PDC plates lifetime. Methods: finite-element technique, continuum mechanics principle, abrasion theory elements, analysis-and-synthesis methods, algorithmization. Results. Achieving of the goal made it possible to extend the drilling bits operational life and cut its maintenance operation time through using the PDC of varying strength that are different in geometrical solutions or architectural decisions on the basis of the stress distribution analysis for all the drilling regimes.