4. Geometrical instruments
  5. Area integrators
  6. Electrical

Alex Dufrene

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Collar locating apparatus

Geometrical instruments – Area integrators – Electrical
Patent

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Releasable overshot

Handling: hand and hoist-line implements – Grapple – Well type
Patent

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Setting and retrieval device for down-hole equipment

Handling: hand and hoist-line implements – Grapple – Well type
Patent

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Tubing plug apparatus for performing down-hole pressure tests

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Profile ID: LFUS-PAI-P-1125269

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