1.Each slot opening of sand control screen between adjacent wires is V-shaped,
resulting from the special shape of the wire used to form the screen surface.
2.The V-shaped opens, designed to be nonclogging, are narrowest at the
outer face and widen inwardly.
3.Continuous-slot Johnson deep well screens provide more intake area
per unit area of screen surface than any other type.
4.For any given slot size, this type of screen has maximum open area.