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<p>Long-term erosion caused by sand-laden oil and gas during offshore extraction presents substantial challenges to dual-layer cage-type choke valves. To gain deeper insight into the internal flow behavior and particle-induced erosion mechanisms, this study develops a CFD model based on gas–liquid–solid multiphase flow theory coupled with an erosion prediction model, thereby better reflecting realistic operating conditions. The influence of key parameters including continuous phase flow regime, particle size, concentration, and valve opening on the erosion rate is systematically investigated under different operational stages of oil and gas production. Results reveal that erosion is primarily concentrated around the valve holes and the front section of the second-layer valve cage. The erosion rate under mixed flow conditions is slightly higher than that under stratified flow. As the oil phase fraction decreases and the water phase increases, the most severely eroded region within the valve orifice gradually shifts forward, and the erosion on the second cage becomes more dispersed. Among all parameters analyzed, valve opening shows the strongest correlation with erosion rate. Under harsh working conditions, the predicted cumulative erosion depth over a five-year period is approximately 6.2574&#xa0;mm, offering valuable insights for erosion-resilient design and maintenance of subsea choke valves.</p>

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Erosion Behavior and Life Prediction of Dual-Layer Cage-Type Choke Valves in Multiphase Flow Environments

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Xiangyu Wang,
  • Jin Dong,
  • Pengjie Gu,
  • Xiaotao Yu,
  • Peng Jia,
  • Liquan Wang,
  • Feihong Yun,
  • Yuan Zhong

摘要

Long-term erosion caused by sand-laden oil and gas during offshore extraction presents substantial challenges to dual-layer cage-type choke valves. To gain deeper insight into the internal flow behavior and particle-induced erosion mechanisms, this study develops a CFD model based on gas–liquid–solid multiphase flow theory coupled with an erosion prediction model, thereby better reflecting realistic operating conditions. The influence of key parameters including continuous phase flow regime, particle size, concentration, and valve opening on the erosion rate is systematically investigated under different operational stages of oil and gas production. Results reveal that erosion is primarily concentrated around the valve holes and the front section of the second-layer valve cage. The erosion rate under mixed flow conditions is slightly higher than that under stratified flow. As the oil phase fraction decreases and the water phase increases, the most severely eroded region within the valve orifice gradually shifts forward, and the erosion on the second cage becomes more dispersed. Among all parameters analyzed, valve opening shows the strongest correlation with erosion rate. Under harsh working conditions, the predicted cumulative erosion depth over a five-year period is approximately 6.2574 mm, offering valuable insights for erosion-resilient design and maintenance of subsea choke valves.