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GRE downhole tubing / GRE downhole casing
GRE downhole slot liner (slotted liner pipe)


Continuous slot screen, pipe base screen, perforated tube, slotted pipe, sieve strainer, gas strainer, casing pipe

Length:9.14 (each)

Outside Diameter: 50-500mm

Thread: API

Slot width:(0.10-4)mm±0.03mm

Slot number: as per customer's requirement

Slot shapes: straight in line pattern, staggered pattern ,spiral pattern

Slot space: as per customer's requirement

Slotted casing with apertures of 0.20-6mm are wide used in prevention of oil and wells


1. High corrosive resistance properties.

2. Screens with high open area are more suitable for the construction of high-quality water wells, oil wells and gas wells.

3. Low cost operation      

Screens with high open area shall favour groundwater infiltration. Abundant water shall reduce the water level’s down, thus to save energy consumption.

4. Reduce the abrasion of the pump            
Under the same condition, high open area can make the speed of groundwater’s entering into the screen much slower than any other filtration apparatus, which will avoid sand’s entering into screen because of high pressure, thus reduce the abrasion of the pump.

5. Extend the life span of wells

Comparatively, groundwater’s entering into screen with higher open area is much easier than the entering into lower open area screen. The slow water flow shall extend the life span of wells.