The double-head drilling method is a drilling system that works with separately coordinated drilling tools on a rotary drilling drive, a percussion drilling drive or a rotary percussion drilling drive. As a rule, the drilling method between outer and inner pipes rotates in opposite directions.

• Outer tubes smooth rods for rotary drilling
• Inner tubes with percussion rods
• Hydraulic hammer drill

Inside pipes are drilled with percussion rods above the hydraulic hammer, which is located above the rotary drive.

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