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A Downhole Hydrocyclone for the Recovery of Natural Gas Hydrates and Desanding: The CFD Simulation of the Flow Field and Separation Performance

Author

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  • Shunzuo Qiu

    (Department of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
    State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Guorong Wang

    (Department of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Leizhen Wang

    (Department of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Xing Fang

    (Department of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)

Abstract

The application of a hydrocyclone to recycle NGH and desand during NGH exploitation is a novel idea. The flow field and performance of this hydrocyclone is in the frontier of the research in this field and is unclear so far. This research aimed to reveal the flow field characteristics and performance of NGH downhole hydrocyclones. In this paper, flow field, solid phase particle volume distribution and separation efficiency were investigated according to the two objectives of NGH recovery efficiency and sand removal efficiency with different inlet velocities by computational fluid simulations (CFD)-FLUENT software. The results show that the short circuit flow contributed to the recovery of NGH. Axial velocity is a decisive factor in balancing the two objectives of NGH recovery efficiency and sand removal efficiency. In addition, the same as those in traditional hydrocyclones, the static pressure, tangential velocity and turbulence intensity play key roles in separation performance, hydrocyclone performance can be improved by increasing the inlet velocity. On the other hand, most separation efficiencies were greater than 80%, when the particle size was larger than 15 µm, and the differential pressure was less than 0.6 MPa. Therefore, all the above results confirm that hydrocyclone has good performance in NGH exploitation, and the basis of its structural design and optimization are provided.

Suggested Citation

  • Shunzuo Qiu & Guorong Wang & Leizhen Wang & Xing Fang, 2019. "A Downhole Hydrocyclone for the Recovery of Natural Gas Hydrates and Desanding: The CFD Simulation of the Flow Field and Separation Performance," Energies, MDPI, vol. 12(17), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3257-:d:260428
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    References listed on IDEAS

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    1. Michael T. Kezirian & S. Leigh Phoenix, 2017. "Natural Gas Hydrate as a Storage Mechanism for Safe, Sustainable and Economical Production from Offshore Petroleum Reserves," Energies, MDPI, vol. 10(6), pages 1-8, June.
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    4. Jingsheng Lu & Youming Xiong & Dongliang Li & Xiaodong Shen & Qi Wu & Deqing Liang, 2018. "Experimental Investigation of Characteristics of Sand Production in Wellbore during Hydrate Exploitation by the Depressurization Method," Energies, MDPI, vol. 11(7), pages 1-17, June.
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    3. Qi Nie & Meiqiu Li & Sizhu Zhou, 2022. "Structural Parameter Optimization of the Helical Blade of the Variable-Pitch, Downhole, Cyclone Separator Based on the Response Surface Method," Energies, MDPI, vol. 15(18), pages 1-15, September.

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