A SCREEN SUITABLE FOR USE IN A WELL FOR WATER,OIL OR NATURAL GAS

摘要

A screen, particularly a well screen to be used for a deep well, comprises a reinforcing member (2) of generally cylindrical configuration, a plurality of support rods (3) arranged on the outside of said reinforcing member (2) in the axial direction thereof at a predetermined interval and a wire (4) wound helically on the outside of said support rods (3) at predetermined pitch. A multitude of slits (2b) each of which is continuous in substantially the circumferential direction of said reinforcing member (2) being formed at a predetermined pitch in said reinforcing member (2).