4. Measuring and testing
  5. Borehole or drilling
  6. Downhole test

T. Edward Martin

Inventor

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Drawworks control apparatus

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Rate of penetration recorder

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Signal generator for a penetration rate measuring apparatus

Measuring and testing – Borehole or drilling – Downhole test
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Profile ID: LFUS-PAI-P-446491

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