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Change of the Properties of Steel Material of the Roller Cone Bit Due to the Influence of the Drilling Operational Parameters and Rock Properties

Author

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  • Jurij Šporin

    (Department of Geotechnology, Mining and Environment, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia)

  • Tilen Balaško

    (Department of Materials and Metallurgy, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia)

  • Primož Mrvar

    (Department of Materials and Metallurgy, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia)

  • Blaž Janc

    (Department of Geotechnology, Mining and Environment, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia)

  • Željko Vukelić

    (Department of Geotechnology, Mining and Environment, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia)

Abstract

The breakdown of the drill bit or rapid decrease of the rate of penetration during the drilling process results in a delay in the progress of drilling. Scientists and engineers are increasingly focusing on research to extend the bit life and improve the drilling rate. In our work, “in situ” drilling parameters were monitored during the drilling process with the roller cone drill bit IADC 136, diameter 155.57 mm (6 1/8"). After drilling, the bit was thoroughly examined to determine the damage and wear that occurred during drilling. The following modern and standardized investigative methods were used: an analysis of rock materials and an analysis of micro and macrostructure materials of the roller cone bit. Analyses were carried out using optical and electron microscopy, a simultaneous thermal analysis of materials of drill bit, analysis of the chemical composition of materials of drill bit, and a determination of the geomechanical parameters of rock materials. The resulting wear, local bursts, and cracks were quantitatively and qualitatively defined and linked to the drilling regime and the rock material. The results of our investigation of the material of the roller cone bit can serve as a good base for the development of new steel alloys, which can resist higher temperatures and enable effective drilling, without structural changes of steel material.

Suggested Citation

  • Jurij Šporin & Tilen Balaško & Primož Mrvar & Blaž Janc & Željko Vukelić, 2020. "Change of the Properties of Steel Material of the Roller Cone Bit Due to the Influence of the Drilling Operational Parameters and Rock Properties," Energies, MDPI, vol. 13(22), pages 1-22, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:5949-:d:445150
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    References listed on IDEAS

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    1. Pengqi Qiu & Xuehui Li & Jianguo Ning & Jun Wang & Shang Yang, 2019. "Study on Thermal Energy Conversion Theory in Drilling Process of Coal and Rock Mass with Different Stresses," Energies, MDPI, vol. 12(22), pages 1-14, November.
    2. Zisis Vryzas & Vassilios C. Kelessidis, 2017. "Nano-Based Drilling Fluids: A Review," Energies, MDPI, vol. 10(4), pages 1-34, April.
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    Cited by:

    1. Kuidong Gao & Jihai Liu & Hong Chen & Xu Li & Shuan Huang, 2023. "Dynamic Characteristics of Rock Holes with Gravel Sediment Drilled by Bit Anchor Cable Drilling," Sustainability, MDPI, vol. 15(7), pages 1-17, March.

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