Johnson Type Screen consist of V-shape profile wire and the longitudinal support rods. Each intersecting point of these wires is fusion welded. So Johnson screen pipe has sturdy constriction and good mechanical property. The V-shape section plane can avoid blockage, and make sure of the unimpeded water. The continuous slot have more open area, and it can reduce the speed of the water entering to avoid the sand entering the screen under the great pressure, so water well screen pipe can filter sand better. Meanwhile,,the slot size can be changed according to the real condition of the earth .
