As sand plug occurs, stop adding proppants and circulate them out.
出现砂堵，停止加砂，进行循环。
A new scroll spring is provided for cleaning the sand filtering passage to prevent sand plug.
通过新颖的防砂涡卷弹簧可在防砂的同时清洁滤砂通道，防止滤砂通道堵塞。
In the process of fracturing operation, sand plug will affect the effects of fracturing and cause serious economic loss.
气井压裂施工过程中产生砂堵在影响压裂效果的同时将会产生严重的经济损失。
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