Pass IS9001:2000 international quality management system authentication and State Power Corporation (original Ministry of Electric Power) authentication SK001403-13, and execute SY5182-87 of original Ministry of Petroleum.

1, With single-layered screen pipe, double-layered screen pipe, built-in central pipe (basic pipe) as well as various other structures.

2, Flat joint, common screw joint, taper male connector, stair male connector.

3, Mainly used to prevent sand and slurry for oil well, gas well and water well.