Multi-layer Filter Tube

Specification 
1.Layer:Two
2.Minimum slot:0.1mm
3.Standard length:1-6meters
4.Another name:gravel pack screen pipe
5.Screen jacket: Johnson screen
6.Screen Packing tower is equipped with high -intensity shaker to ensure filter media is tightly packed for optimal sand control

Multi-layer filter tube
We design to allow slurry to bypass sections that have bridged prematurely or become obstructed during gravel-pack operations. With multiple apertures located along the packing tubes in each screen, flow is redirected through the shunt tube system and the shunted screens more uniformly distribute the gravel or the slurry across the wellbore.
Enhanced Low Profile and Premium Low Profile Prepacked Screens — These screens can be used in gravel-packed and non-gravel packed wells. They incorporate a strong inner wire wrap layer made from round wire and a keystone-shaped outer wire wrap layer.
Prepacked Screens — When gravel packing is not feasible, prepacked screens provide built-in sand control. They incorporate a keystone-shaped wire for the inner and outer wire wraps. 

Advantage
1. Collapse strength equal to pipe;
2. Double the tensile strength of standard rod based screen;
3. A bioresistant, hydraulically superior (to silica sand) pack;
4. A greater percentage of open area(for deep applications) than that of a conventional screen, due to the dual support construction

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