Enhancement of drilling equipment efficiency designed for reactive turbo drilling
The results of work aimed at improving of the drilling instrument used for reactive turbo drilling are presented in the article. The analysis of the structures and operation of the assemblies that realize reactive turbine drilling is conducted. The basic design weak points of the existing drilling tools that are used in the process are revealed. The kinematics of rolling cutter drilling bit in conditions of reactive turbo drilling is studied. Mathematical modeling of movement of a rolling-cutter tooth of a drill bit, working in the unit a reactive turbodrilling assembly is performed. The conducted studies served the basis for development of some structural scheme of a rolling cutter drilling bit with differently oriented carbide teeth cutting structures for drilling medium abrasive rocks. It allows significant enhancement of the instrument operational efficiency due to even teeth wear-out of all cutting structures rows and energy consumption reduction during rock destruction. Application of the proposed structural scheme will improve mechanical penetration rate and reduce the drilling cost of large diameter wells when using reactive turbo drilling.