4. Tool driving or impacting
  5. Advance causing or controlling means
  6. Tool advances relative to drive
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Rotary drive assemblies

Tool driving or impacting – Advance causing or controlling means – Tool advances relative to drive
Patent

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Rotary pull down pull up drive for drill pipes

Tool driving or impacting – Advance causing or controlling means – Tool advances relative to drive
Patent

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Rotary tool with axial feed

Tool driving or impacting – Advance causing or controlling means – Tool advances relative to drive
Patent

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