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ALFA Lite

Wire wrap sand screen (no base pipe)

ALFA Lite
DESCRIPTION

AlfaLite model is the variant of wired wrapped sand screens based on rods with no base pipe inside. These products are manufactured by the method of spiral coiling of profiled wire on support elements (rods) of different cross-section, connected by contact welding at each point of their intersection. This type of sand screen does not have an additional frame in the form of a perforated base tube, while for many applications this type of screen has a sufficient margin of safety when using it. The absence of a base pipe reduces the pressure loss on the filter surface and increases its productivity. The type of sand screen can be manufactured for various sizes of slotted gratings. AlfaLite filters are used in conditions where high-quality filtration from sand is required at high well rates.

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ALFALite
SPECIFICATIONS:

                    Compact, robust design of sand screen with wrap-on-pipe construction

                    Outer diameter in the range from 60 to 1000 mm

                    Length in the range from 100 to 8000 mm

                    The slot size is from 50 to 2000 μm

                    Product material: stainless steel AISI 304, 321, 316L

APPLICATION:

                    AlfaDirect sand screen is used in oil and gas wells to increase the life of the well and downhole equipment.

                    It is applicable in conditions of variable chemical composition of the extracted fluid, when there is a danger of corrosion and sticking with ferruginous and carbonate sediments, as the filter restores its efficiency after regeneration (washing, acid treatment)

ALFALite
ADVANTAGES:

                    Large open screen surface (up to 30%) allows increasing the debit of the well and reducing the compression pressure on the surface of the filter.

                    High accuracy of slot size, size tolerances of slotted holes no more than 15 μm 

                    The dense shrinkage of the wire jacket on the base pipe provides an ideal cylindrical shape

                    Heavy-duty filter design. By the level of compressive strength and rupture is not inferior to the casing

                    Stainless steel grade AISI 304, AISI 316 makes the sand screen resistant to corrosion and high temperatures.

                    All forces are transferred to base pipe. And screen and base pipe behave as one unit.

                    The V-shaped profile of the wire contributes to the stability of the filter to the sticking effect, since there is virtually no sticking inside the slot.


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