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<p>During deep-well exploration and testing, artificial lift and drainage systems predominantly rely on advanced pump technologies. Internal circulation jet pumps demonstrate superior performance among available options. To optimize both lifting efficiency and production rates under deep-well operational conditions, a theoretical model was developed and the flow dynamics were analyzed through numerical simulations. Post-simulation, the spatial distributions of flow velocity, pressure, and oil-water two-phase flow within the jet pump were obtained. With a certain nozzle diameter (<i>d</i><sub>nozzle</sub> = 3 mm), some other key structural parameters–including throat inlet diameter (<i>d</i><sub>throat</sub> = 1.12<i>d</i><sub>nozzle</sub>–1.58<i>d</i><sub>nozzle</sub>), throat-nozzle axial spacing (<i>e</i> = 0.50<i>d</i><sub>nozzle</sub>–2.33<i>d</i><sub>nozzle</sub>), throat pipe length (<i>l</i><sub>throat</sub> = 5<i>d</i><sub>throat</sub>–8<i>d</i><sub>throat</sub>) and throat divergence angle (<i>α</i><sub>throat</sub> = 0°–4.25°), diffusion pipe diameter (<i>d</i><sub>diffusion</sub>), diffusion pipe length (<i>l</i><sub>diffusion</sub> = 31<i>d</i><sub>diffusion</sub>–42<i>d</i><sub>diffusion</sub>) and diffusion angle (<i>α</i><sub>diffusion</sub> = 5°–9°)–were systematically investigated to maximize the pressure differential between the nozzle exit and the reservoir formation. The conclusions reveal that the optimized configuration, compared with the original designs, achieves a 21.3% increase in maximum suction capacity (22.2 MPa to 26.93 MPa), thereby enhancing heavy oil production efficiency. This systematic approach establishes a comprehensive design framework for next-generation jet pump systems.</p>

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Optimization of structural parameters for deep-well internal circulation jet pump based on numerical simulation

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Ai-hua Li,
  • Zhi-hui Liu,
  • Yong-hai Gao,
  • Xin-xin Zhao

摘要

During deep-well exploration and testing, artificial lift and drainage systems predominantly rely on advanced pump technologies. Internal circulation jet pumps demonstrate superior performance among available options. To optimize both lifting efficiency and production rates under deep-well operational conditions, a theoretical model was developed and the flow dynamics were analyzed through numerical simulations. Post-simulation, the spatial distributions of flow velocity, pressure, and oil-water two-phase flow within the jet pump were obtained. With a certain nozzle diameter (dnozzle = 3 mm), some other key structural parameters–including throat inlet diameter (dthroat = 1.12dnozzle–1.58dnozzle), throat-nozzle axial spacing (e = 0.50dnozzle–2.33dnozzle), throat pipe length (lthroat = 5dthroat–8dthroat) and throat divergence angle (αthroat = 0°–4.25°), diffusion pipe diameter (ddiffusion), diffusion pipe length (ldiffusion = 31ddiffusion–42ddiffusion) and diffusion angle (αdiffusion = 5°–9°)–were systematically investigated to maximize the pressure differential between the nozzle exit and the reservoir formation. The conclusions reveal that the optimized configuration, compared with the original designs, achieves a 21.3% increase in maximum suction capacity (22.2 MPa to 26.93 MPa), thereby enhancing heavy oil production efficiency. This systematic approach establishes a comprehensive design framework for next-generation jet pump systems.