1.best forged drill pipe rod in china 2.best quality with good price non-dig  drill pipe rod heat treatment :we are the only who not only do heat treatment at the joints but also do heat treatment for the whole body of the drill pipe.Our special design heat treatment is...

1.best seller in south east Asia 2.best quality with good price Crowded expansion type for the expansion (Φ 200-Φ 1800). Used for a soft soil strata.And the drill pipe connection mode: will discharge type (eight party set of structure),straight even type (directly...