4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

Jean-Luc Jacob

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Cell for testing the sealing quality of an oil-well safety-valve

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Oil-well flap-type safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Oil-well safety-valve and tool for installing the same

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Pumped oil well bottom safety valve

Wells – With eduction pump or plunger – Receptacles
Patent

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Safety valve for oil-wells and installation tool for the valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Profile ID: LFUS-PAI-P-407883

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