TREA

Drives for combined percussion and rotary drilling

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Industry

  • CPC
  • E21B6/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING

Current Industry

E21B6/00Drives for combined percussion and rotary drilling

Sub Industries

E21B6/02the rotation being continuous E21B6/04Separate drives for percussion and rotation E21B6/06the rotation being intermittent, e.g.obtained by ratchet device E21B6/08Separate drives for percussion and rotation
Industries