Punched Slotted Screen        Composed of base pipe, high-density punched slot shroud and stainless steel support rings, :   It has 3-4 layers:        Base pipe: Slotted API 5CT      Filter screen: wire-mesh, or metal cotton ( and inner protective layer)      Protective jacket: Punched stainless.  All the layers are connected by welded backup ring               The HUEIG punched slot screen has following features:       1, higher filtering ability , with higher self-cleaning ability. Besides, rigid filtering shroud, and effectively protects.       2 Effective across area is approximately 3-5 times as big as slotted screen..       3, higher base pipe mechanical strength by addoping API tubing       4, High corrosion resistance, and great tripping-in performance        Specs and details may be obtained by e-mail or telephone