Wire wrapped screen are manufactured by a v or wedge shapped wire around an internal array of longitudinal support rods. Each intersecing point of these wires is fusion welded. The v or wedge shapped profile wire wraps around the support rods over the full length of the screen creating a continuous slot opening, hence the screen allows water (oil) to enter your well freely in ample quantities, while at the same time keeps the majority of sand and gravel out of the well.
Nowadays, wire-wrapped screens are highly effective in any formation and application due to the fact that slot widths of less than 0.2mm can be realised. At the same time, the large open area ensures that friction as well as entrance losses are kept to a minimum.