| 摘要 |
<p>A cylindrical well screen (1) includes support rods (2) extending in the axial direction of the screen and arranged at a predetermined interval in the circumferential direction of the screen, a spiral wire (3) wound on the outer surface of the support rods (2) so as to form a slit (3a) of a predetermined width, and a plurality of skid rods (4) made of metal rods extending in the axial direction of the screen and arranged at a predetermined interval in the circumferential direction of the screen. The skid rods (4) are welded to the outer surface (3b) of the spiral wire.(3).</p> |
