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Information × Registration Number 0213U005481, 0108U009397 , R & D reports Title Development and application of spring couplings for improvement of controlled directional bores drilling technology at SC "Chornomornaftogas" popup.stage_title Head Ivasiv Vasyl Myhajlovych, Registration Date 05-06-2013 Organization Ivano-Frankivsk Nstional Technical University of Oil and Gas popup.description2 Following the results of the work done, simulation model for characteristic estimation of flexible coupling attached to downhole drill stem assembly interaction with bottom hole and borehole walls, as well as estimation of its stress strain state during drilling, was elaborated; changes in marginal conditioins when estimating flexible coupling attached to downhole drill stem assembly for intensive caving and key-seating at borehole walls, were offered; methodology of taking into account real stress strain state of flexible coupling attached to downhole drill stem assembly was offered to check assembly meeting the conditions that appeared at certain period of time. This allows quickly react on changed in drilling conditions and increases possibility of driling rig installation according to project profile. Product Description popup.authors Івасів Василь Михайлович Гриців Василь Васильович Грохольський Володимир Володимирович Дейнега Руслан Олександрович Ногач Микола Миколайович popup.nrat_date 2020-04-02 Close