Increasing the reliability of drill pipe in the design stage by using mathematical modeling of the process of hardening the surface of thread

Evgeniy D. Mokronosov CJSC Permskay kompania neftynogo mashinostroeniya Krasnokamsk, Russian Federation  
Mikhail V. Pesin State National Research Polytechnical University of Perm Perm, Russian Federation
Shown the experience the russian company in solving the actual problem of increasing reliability of drill pipe.
Materials and methods
Methods of mathematical modelling, mathematical statistics are used.
As a result the applications of new constructions of drill pipe was growth reliability of drill pipe.
Constructions are developed that designing new construction of drill pipe.
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reliability drill pipe thread hardening