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In high-temperature, high-pressure, and high-sulfur oil and gas extraction environments, the positioning failure of packer slips is a critical factor leading to unstable setting and casing damage. To address this issue, this study innovatively adds a hydraulic anchor to the Y441 through-cable packer, forming a ‘slip + hydraulic anchor’ dual positioning system. Based on ANSYS, a refined finite element model of the slip-casing contact was established to systematically investigate the effects of slip parameters (tooth angle: 45°/60°; number of teeth: 8/9/10) on embedding depth, contact stress distribution, and positioning stability under setting loads (15–25 MPa). Results show that under 25 MPa, the 45° tooth angle with 9-tooth structure achieves an optimal embedding depth of 1.2719 mm, which not only meets the safety requirement (≤10% of casing wall thickness) but also balances anchoring reliability and casing protection. The dual positioning system significantly enhances anti-slip capability, providing a theoretical basis for optimizing slip structural parameters in complex downhole environments.

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Simulation of Positioning Performance of Packer Slip Structure in Setting Process

  • 会议论文

  • 发表日期：

    2026年

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  • Bao Zhang,
  • Jun Yi,
  • Xiang Si,
  • Nu Zeng,
  • Xuesong Wang,
  • Yinping Cao

摘要

In high-temperature, high-pressure, and high-sulfur oil and gas extraction environments, the positioning failure of packer slips is a critical factor leading to unstable setting and casing damage. To address this issue, this study innovatively adds a hydraulic anchor to the Y441 through-cable packer, forming a ‘slip + hydraulic anchor’ dual positioning system. Based on ANSYS, a refined finite element model of the slip-casing contact was established to systematically investigate the effects of slip parameters (tooth angle: 45°/60°; number of teeth: 8/9/10) on embedding depth, contact stress distribution, and positioning stability under setting loads (15–25 MPa). Results show that under 25 MPa, the 45° tooth angle with 9-tooth structure achieves an optimal embedding depth of 1.2719 mm, which not only meets the safety requirement (≤10% of casing wall thickness) but also balances anchoring reliability and casing protection. The dual positioning system significantly enhances anti-slip capability, providing a theoretical basis for optimizing slip structural parameters in complex downhole environments.