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

Peter Budde

Inventor

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Anti-rotation devices for use with well tools

Wells – Pistons – fluid driven into well
Patent

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Apparatus and a method for launching plugs

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Cementing system

Wells – With below and above ground modification – Head for tool – piston or cleaner
Patent

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Cementing systems for wellbores

Wells – Pistons – fluid driven into well – With downflow past piston
Patent

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Fill valve

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

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Profile ID: LFUS-PAI-P-846934

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