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

Larry V. Cooper

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Flexible sinker bar assemblies

Wells – Guide for device or conduit – For a wireline operation
Reexamination Certificate

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Knuckle swivel for servicing wells

Joints and connections – With distinct fluid or article handling or directing feature – External reservoir
Reexamination Certificate

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Knuckle-swivel for drilling wells

Joints and connections – With distinct fluid or article handling or directing feature – External reservoir
Reexamination Certificate

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Retrievable float valve assembly

Metal working – Method of mechanical manufacture – Shaping by direct application of fluent pressure
Patent

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Retrievable float valve assembly

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

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Profile ID: LFUS-PAI-P-960766

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