flanged drill pipe Ф273 mm for reverse circulation air lift drilling Large diameter flanged drill pipe

flanged drill pipe Ф273 mm for reverse circulation air lift drilling Large diameter flanged drill pipe flanged drill pipe for reverse circulation air lift drilling. It is a part of drill string to transmit the torque from the rotator of the pile-top drilling rig to the drill bit body Air Lift Drill Pipe drill pipe specification Ф273*18*3000 Ф325*18*2500/3000 Ф325×20×2500 Ф351*20*3000 Ф377*22*3000 Ф377*24*3000 Ф406*26*3000 φ559*22-φ351*14*3500 flanged drill pipe for Large Diameter Hydraulic Driven Drilling Large diameter flanged drill pipe for reverse circulation air lift drilling rig large dia drill pipe with flange end for reverse circulation air lift drill size ф273mm,ф377mm, size200mm-800mm Air lift drill pipe for reverse circulation reverse circulation air lift drill rock reammer bit Large diameter hole drag bit air lift reverse circulation roller bit core barrel,core barrel for air lift reverse circulation drilling.reverse circulation AIR SWIVEL underreaming bit for reverse circulation air lift drilling tianjin huachang xingye technology co.,ltd  email info@tjdrilling.com  web:www.tjdrilling.com  tel:0086-22-58656461 whatsapp :008618902059907