4. Tools
  5. Wrench, screwdriver, or driver therefor
  6. Machine

Martin E. True

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Combination subsurface safety valve and chemical injector valve

Wells – Processes – Entraining or incorporating treating material in flowing...
Patent

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Power pipe thread cleaner

Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent

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Power pipe tong rotary plunger inserter

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Power spinner for rotating a kelly joint

Tool driving or impacting – Means to drive tool about an axis – Means to hold and relatively rotate sections of tool shaft
Patent

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Power tong apparatus

Tools – Wrench – screwdriver – or driver therefor
Patent

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Profile ID: LFUS-PAI-P-195799

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