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

Joseph E. Chapman, III

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Apparatus for protecting downhole instruments from torsional and

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Single-wire selective performation system

Boring or penetrating the earth – Boring with explosion in inaccessible hole – Independent firing of plural charges
Patent

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Profile ID: LFUS-PAI-P-593112

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