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During the shale gas extraction process, there exists the phenomenon of sand erosion, which has the greatest impact on the wall of the elbow pipe. Thinning of the pipe wall will affect the safe production of shale gas. To formulate prevention and control schemes, a gas-solid two-phase flow elbow erosion device was designed. Using L245 steel as the test material, the influence of different flow velocities and sand particle sizes on the erosion rate of the elbow and different positions was studied. The results show that the erosion rate on the inner side of the pipe is smaller than that on the outer side, and the erosion rate increases with the increase of the flow velocity. The influence of the flow velocity on the erosion at different positions of the elbow is fluctuating, and an increasing trend appears at the outlet. With the increase of the sand particle diameter, the erosion rate increases, and the erosion position shifts towards the outlet.

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Erosion Impact on Shale Gas Gathering and Transportation Elbows

  • 会议论文

  • 发表日期：

    2025年

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  • Bo Peng,
  • Feifei Zhao,
  • Xianzhi Wang,
  • Shuanyi Liu,
  • Yanling Pu

摘要

During the shale gas extraction process, there exists the phenomenon of sand erosion, which has the greatest impact on the wall of the elbow pipe. Thinning of the pipe wall will affect the safe production of shale gas. To formulate prevention and control schemes, a gas-solid two-phase flow elbow erosion device was designed. Using L245 steel as the test material, the influence of different flow velocities and sand particle sizes on the erosion rate of the elbow and different positions was studied. The results show that the erosion rate on the inner side of the pipe is smaller than that on the outer side, and the erosion rate increases with the increase of the flow velocity. The influence of the flow velocity on the erosion at different positions of the elbow is fluctuating, and an increasing trend appears at the outlet. With the increase of the sand particle diameter, the erosion rate increases, and the erosion position shifts towards the outlet.