The wire-wrapped screen consists of perforated pipe, outer jacket, end ring and centralizer. Key-stone or house shape wires are simultaneously wrapped and welded to form uniform slots.

The jacket is then placed over perforated pipe and welded to each end. The wire-wrapped screen's strength, high quality and precise slot control make it an excellent choice for deep, vertical wells as well as horizontal wells.

ADVANTAGES

• Key-stone shaped slot pattern, low risk to plugging. easy to clean.Superior resistant to corrosion and long lifespan in applications.
• Optimized design for perforation,all welded structure, high mechanical strength which is competitive with casing of the same size.
• Minimum slot opening: 0.1mm,which can satisfy the most of well-completion requirements. High flow area.
• The technical is mature, good adaptability.

SLOTTED LINER

Slotted liners are made from tubular by saw-cutting slot configurations. Slot widths are often referred to in terms of gauge. Slot or screen gauge is simply the width of the opening in inches multiplied by 1,000. For instance, a 12-gauge screen has openings of 0.012 in.

The slots can be straight or keystone shaped, as illustrated in following picture. The keystone slot is narrower on the outside surface of the pipe than on the inside. Slots formed in this way have an inverted "V cross-sectional area and are less prone to plugging because any particle passing through the slot at the outside diameter (OD)of the pipe will continue to flow through, rather than lodging within the slot.

APPLICATION

The slotted liners are usually less costly. They have smaller inflow areas and experience higher pressure drops during production. Slotted liners also plug more readily than screens. They are used where well productivity is small and economics cannot support the use of screen.