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采用自行研制的井底岩屑磨料脉冲射流工具及模拟井筒实验装置,通过磨料脉冲射流破岩实验,研究了磨料介质(岩屑、石英砂及钢珠)、自激振荡腔内碰撞壁以及喷嘴的磨损情况。结果表明,岩屑磨料在对岩石冲击磨削的同时,其自身强度也在衰减;石英砂的尖锐棱角被磨平,颗粒变得圆滑;钢珠质量在破岩实验的0～60min内减少比较明显,在60min之后减少的幅度降低,同时,其外表面和球度也发生改变,但未见明显的裂缝等微观特征;冲蚀严重的位置位于井底岩屑磨料脉冲射流调制工具自激振荡腔内的碰撞壁、喷嘴以及流道等处。
By using pulsed jet tool with bottomhole debris abrasive and simulated wellbore experimental device developed by ourselves, the effects of abrasive medium (cuttings, quartz sand and steel balls), self-excited oscillating cavity impact wall and nozzle Wear and tear The results show that the detritus abrasive attenuates its own strength while impacting the rock; the sharp edges and corners of the quartz sand are smoothed and the particles become smooth; the ball mass decreases more obviously within 0 ~ 60min of the rock breaking experiment , And the decreasing amplitude decreases after 60min. Meanwhile, the outer surface and sphericity also change, but no obvious microscopic features such as cracks are found. The location of serious erosion is located in the bottom of the well debris abrasive pulse jet modulation tool self-excited oscillation cavity Within the collision wall, nozzle and runner and other places.