Apparatus and process for drawing water from a water-bearing strata

摘要

In order to draw water free of sand from a well bored into a water-bearing strata a cylindrical permeable body is located concentrically within the perforated wall of the well. The cylindrical body may in turn comprise concentric outer and inner slotted tubes with a permeable cylinder or a granulate therebetween. The lower end of the cylindrical body is closed and the upper end is connected to a pump.