4. Hydraulic and earth engineering
  5. Subterranean or submarine pipe or cable laying, retrieving,...
  6. Repair, replacement, or improvement

Alexandr D. Kostylev

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Air-operated reversible percussive action machine

Tool driving or impacting – Impacting devices – Selective axial direction of impact
Patent

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Air-operated reversible percussive action machine

Tool driving or impacting – Impacting devices – Selective axial direction of impact
Patent

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Annular air hammer apparatus for drilling wells

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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Annular air-hammer apparatus for drilling holes

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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Annular air-hammer apparatus for drilling holes

Boring or penetrating the earth – With below-ground tool drive prime mover
Patent

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Profile ID: LFUS-PAI-P-271149

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