Disadvantages of traditional silting and plugging methods

One is to set a communicating filter pool between two steel pipe piles for slag discharge and slurry exchange. In order to ensure the height of water head in the hole, a connecting filter is set 2 meters below the drill floor. Disadvantages: inconvenient. 2. The mud separator is installed on the mud ship, which is very convenient. The effect is good, but I heard that the machinery rental fee is more expensive. Disadvantages: expensive