4. E - Fixed Constructions
  5. 21
  6. B

Ray M. Mitchhart

E - Fixed Constructions – 21 – B

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Drill pipe handling mechanism

E - Fixed Constructions – 21 – B
Patent

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Drill pipe handling mechanism

E - Fixed Constructions – 21 – B
Patent

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Pulldown mechanism for rotary drill apparatus

E - Fixed Constructions – 21 – B
Patent

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Rotary drilling rig

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-202919

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