该工具能大大提高滤砂管防砂效果，具有较好的使用前景。
It can greatly improve the sand control effects of the sand control screen, so it has a very good application future.
首节及中间各节除砂管内装有滤砂筛，末节除管内装有磁铁。
A filter sand riddle is installed in the head desanding tube and in each desanding tube in the middle, and a magnet is installed in the end desanding tube.
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。
A new scroll spring is provided for cleaning the sand filtering passage to prevent sand plug.
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