4. Wells
  5. Screens
  6. Porous material

Benjamin P. Nutter

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Pressure controlled reversing valve

Wells – Screens – Porous material
Patent

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Pressure controlled test valve system for offshore wells

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Safety valve hydraulically operated by telescopic drill stem mov

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

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Profile ID: LFUS-PAI-P-210137

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