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Stainless steel 316L perforated base pipe and screen jacket:
Perforated base pipe and screen combines stainless steel or carbon steel casing with continuous slot well screens for additional strength in deep well applications. The pipe body strength allows smaller wrap wires to be used, allowing for greater open area.
Features:
Higher Collapse resistance.
Higher Load Strength.
Easily controlled open area for regulated flow rates.
Threaded Fittings in any specifications required.
Base pipes can be manufactured using stainless steel grades series or API 5CT carbon steel casing.
The pipe based well screens are recommended when high collapse resistance is required and when the screens’ length generates a high longitudinal constraint. The pipe strength allows smaller wrap wires to be used, yielding greater open area.
OASIS oil tools use prime pipe, thoroughly cleaned and de-burred after perforating.
Material: 201 304 304L 316 316L
Another name: Multilayer screen
Screen jacket: Johnson type well screen
Base pipe: Perforated pipe on API casing and tubing or stainless steel pipes
Connection type: STC, LTC,BTC threaded couplings
Bubble bag, wooden pieces wrapped the Johnson type well screens
Screen jacket  base pipe
Multilayer well screen pipes are used for oil and water exploiting.
Characteristics:
stainless steel 316L perforated base pipe and screen jacket consists of two screens or multilayer screens
Perforated pipe inside ,with perforations wrapped by the outside Johnson type screen
The screen jacket and base pipe are welded together with a length of coupling.
The base pipe can be made of seamless pipe or welded pipe, and more often, casing pipes.
ID of Johnson type well screen equals OD of the perforated pipe.