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Abstract <p>The results of bench tests of universal steel drill pipes (USDPs) after laser hardening, carbonitriding, and final electromechanical surface hardening (EMSH) are presented. The structure and hardness of the external and internal conical–metric lock threads of Z-53 and Z-57 nipples and pipe couplings after EMSH are investigated.</p>

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Increasing the Durability of Universal Steel Drill Pipes by Final Electromechanical Surface Hardening

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • S. K. Fedorov,
  • L. V. Fedorova,
  • Yu. S. Ivanova

摘要

Abstract

The results of bench tests of universal steel drill pipes (USDPs) after laser hardening, carbonitriding, and final electromechanical surface hardening (EMSH) are presented. The structure and hardness of the external and internal conical–metric lock threads of Z-53 and Z-57 nipples and pipe couplings after EMSH are investigated.