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→ Product catalog
→ Drilling tools
→ For shock and rotary drilling
→ Underreamer D=200-250 mm

Underreamer D=200-250 mm

drilling tools

Underreamer D=200-250 mm

DTH underreamers are intended for increase diameter of a well in medium and hard grounds on previously drilled well with application of pneumatic impact tools. The tool consists of three parts: a guide arch along the drilled well diameter, an underreamer case, a shank for fastening to a pneumatic impact tool which can be produced with bayonet and slotted joint.
Underreamer D=200-250 mm
Name Pneumatic impact tool Type of connection with the pneumatic impact tool Nominal diameter, mm Length, mm Weight, kg
Underreamer d=200 mm P-150C slotted 200 400 31,7
Underreamer d=220 mm P-150C slotted 220 400 33,5
Underreamer d=250 mm P-150C slotted 250 400 35,0

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