The flat drill pipe is mainly applicable for the needs of Hydro-hammer percussive-rotary drilling (liquid and gas), which is featured by such advantages as high rigidity, good airtightness, flat external structure, low rotary torsion and less resistance.

Main specifications include: Φ73, Φ89, Φ114, Φ127, which also can be customized according to needs, Length 2m-9.5m.