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Background <p>The drilling of extended-reach horizontal wells is hindered by high friction and resistance, leading to low drilling efficiency. Traditional axial vibration dampening tools have limitations in addressing this issue in long horizontal sections.</p> Methods <p>This paper proposes a multi-source excitation strategy with multiple hydraulic excitation tools (HETs) distributed along the drill string. A dynamic model of the drill string incorporating HET output characteristics is constructed to analyze the effects of tool quantity, spatial arrangement (HET spacing), and output parameters on vibration load energy transfer efficiency and friction reduction at the drill bit.</p> Results <p>Two HETs significantly enhance vibrational energy transfer and distribution. At 15 Hz excitation frequency and 36 kN excitation force, with specific tool placements (190 m from the bit and 200 m from the first tool), the vibration friction reduction rate reaches approximately 64%, improving drilling pressure energy transfer efficiency.</p> Conclusion <p>This study provides theoretical insights and practical guidance for enhancing drilling pressure energy transfer in extended-reach horizontal well drilling and offers new perspectives on multi-source excitation technology applications in complex well conditions.</p>

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Dynamic Analysis of Bit Vibration Load Characteristics in Multi-source Excitation Friction Reduction Technology for Horizontal Wells

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Wenlong Niu,
  • Hualin Liao,
  • Xiaoao Liu,
  • Huajian Wang,
  • Fang Shi,
  • Yucai Shi

摘要

Background

The drilling of extended-reach horizontal wells is hindered by high friction and resistance, leading to low drilling efficiency. Traditional axial vibration dampening tools have limitations in addressing this issue in long horizontal sections.

Methods

This paper proposes a multi-source excitation strategy with multiple hydraulic excitation tools (HETs) distributed along the drill string. A dynamic model of the drill string incorporating HET output characteristics is constructed to analyze the effects of tool quantity, spatial arrangement (HET spacing), and output parameters on vibration load energy transfer efficiency and friction reduction at the drill bit.

Results

Two HETs significantly enhance vibrational energy transfer and distribution. At 15 Hz excitation frequency and 36 kN excitation force, with specific tool placements (190 m from the bit and 200 m from the first tool), the vibration friction reduction rate reaches approximately 64%, improving drilling pressure energy transfer efficiency.

Conclusion

This study provides theoretical insights and practical guidance for enhancing drilling pressure energy transfer in extended-reach horizontal well drilling and offers new perspectives on multi-source excitation technology applications in complex well conditions.