Metal Science and Heat Treatment

, Volume 59, Issue 9–10, pp 646–652 | Cite as

Special Features of Structure and Hardening Treatment of Threaded Joints of Exploration Drill Pipes of Foreign and Russian Producers

  • E. Yu. Priymak
  • A. V. Stepanchukova
  • N. A. Manakov

The structure and the mechanical and operating properties of interlocks of NRQ drill pipes hardened by HFC treatment and carbonitriding are studied. The endurance characteristics and the wear and fatigue resistances of threaded joints of drill pipes of domestic and foreign producers are shown to differ and to depend primarily on the methods of surface hardening.

Key words

interlocks drill pipe HFC hardening carbonitriding breakaway torque cyclic endurance wear resistance 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • E. Yu. Priymak
    • 1
  • A. V. Stepanchukova
    • 2
  • N. A. Manakov
    • 2
  1. 1.Orsk Liberal-Technological Institute (Branch of OSU)OrskRussia
  2. 2.Drilling Equipment PlantOrenburgRussia

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