4. Boring or penetrating the earth
  5. Boring with explosion in inaccessible hole
  6. Firing chamber movable in bore relative to carrier or...

Jay R. Shirley

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Spiral strip perforating system

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Wave strip perforating system

Boring or penetrating the earth – Boring with explosion in inaccessible hole – Firing chamber movable in bore relative to carrier or...
Patent

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Profile ID: LFUS-PAI-P-504214

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