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NT

HOME > OVERBURDEN DRILLING SYSTEMS > NT

overburden drilling system

   overburden drilling system

    NT system is a symmetrical overburden drilling system, designed with wings extended out when drilling holes.
  Specifications

Model

No. of Wings

Bit Diameter (mm) Casing Size (mm) Applicable
Hammer
Expanded Retracted I.D. O.D. Wall
NT460 4 530 455 482.6 508 12.7 ACE380, TD450
NT510 4 586 511 533.4 558.8 12.7 TD450
NT560 4 634 558 584.2 609.6 12.7 TD450, TD550
NT610 4 682 605 635 660.4 12.7 TD550
NT660 4 733 656 685.8 711.2 12.7 TD550
NT710 4 784 707 736.6 762 12.7 TD550
NT745 4 835 730 781 813 16.0 TD500
NT810 4 886 809 838.2 863.6 12.7 TD550, TD700
NT830 4 945 831 889 914.4 12.7 TD700
NT930 4 945 931 984.2 1016 15.9 TD800

Others shank type or size is available with customer's request