Coiled well screen

摘要

A coiled well screen (1) includes an elongated and flexible tubular member (4) wound in the shape of a coil about a drum (5). The tubular screen member (4) include support rods disposed cylindrically and extending in the axial direction and wire means to form a slit of a predetermined width. The coiled screen (1) may further include an elongated and flexible perforated tube formed with openings at a predetermined interval. The coiled screen (1) is made of screen units (2) of a necessary number which are made of flexible materials and are welded to adjacent screen units at end rings (3).