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<p>When extracting sandy heavy oil, progressing cavity pumps (PCPs) often face mismatches between well conditions and pump selection. To balance power, efficiency and wear, this study built a 3D CFD-based flow-structural coupling model (with dynamic mesh) for GLB120 PCPs conveying oil-water-sand mixtures. It analyzed how clearance, lead and eccentricity affect flow, performance and stator deformation under sandy/pure-liquid conditions. Results show uniform pressure/velocity in the pump chamber, but sharp changes near the stator-rotor meshing line. For pure liquid, small clearance, large eccentricity/lead improve performance; for sandy oil, extreme clearance raises loss/wear, while excessive lead/eccentricity increases leakage. Optimal parameters for sandy heavy oil: clearance – 0.9–1×particle diameter, eccentricity – 5 mm, low lead (150 mm, multi-stage). This guides structural optimization for metal/rubber PCPs..</p>

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Structural Parameter Optimization Simulation of Progressing Cavity Pump for Sandy Heavy Oil

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Jianyi Liu,
  • Jiacheng Wang

摘要

When extracting sandy heavy oil, progressing cavity pumps (PCPs) often face mismatches between well conditions and pump selection. To balance power, efficiency and wear, this study built a 3D CFD-based flow-structural coupling model (with dynamic mesh) for GLB120 PCPs conveying oil-water-sand mixtures. It analyzed how clearance, lead and eccentricity affect flow, performance and stator deformation under sandy/pure-liquid conditions. Results show uniform pressure/velocity in the pump chamber, but sharp changes near the stator-rotor meshing line. For pure liquid, small clearance, large eccentricity/lead improve performance; for sandy oil, extreme clearance raises loss/wear, while excessive lead/eccentricity increases leakage. Optimal parameters for sandy heavy oil: clearance – 0.9–1×particle diameter, eccentricity – 5 mm, low lead (150 mm, multi-stage). This guides structural optimization for metal/rubber PCPs..