塑料管水泥管混合式封闭井,其滤水管为水泥砂管,出水管为塑料管,井口直接与水泵相连接。自1988年以来,山东阳谷县已打这种机井500多眼,经实践证明,此种井投资少、寿命长、出水量大、效益高,适用于地下水位埋藏较深的地区。 1.钻孔和其它水泥管工艺相同,孔径 Plastic pipe cement pipe hybrid closed well, the filter for the cement sand pipe, the water pipe for the plastic pipe, wellhead connected directly with the pump. Since 1988, more than 500 wells have been drilled in Yanggu County, Shandong Province. Practice has proved that such wells have low investment, long service life, large amount of water discharge and high benefit. They are suitable for areas with deep buried water table. 1. Drilling and other cementing process the same, aperture