Hydraulic perforating technology uses the erosion of high-velocity solid–liquid flow to punch or cut the target wall. During the perforating process, the high-velocity two-phase flow will bound back to the outer wall of the tool to cause erosion damage, and in severe cases, the tool will fail. In this paper, the discrete phase model was used to obtain the parameters of particles rebound from target wall, and then get the erosion characteristics of outer wall of jet tool including erosion rate and erosion distribution. The critical parameters of 35CrMo erosion were obtained from a solid–liquid jet flow experiment. The calculated results show that the impact velocity and angle of particle on the tool surface are significantly affected by perforation depth. The erosion rate of outer wall of tool will decrease with the increase in perforating depth. The effect of jet flow velocity on eroded areas is more than erosion rate. From that, the erosion rate is mainly affected by the injection velocity of the perforating fluid, while the erosion region is determined by the perforation depth.
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This work was supported by the Xijing University Research Foundation (Grant No. XJ160119) and Xijing University Special Research Foundation (Grant No. XJ17T09).
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