4. Wells
  5. Processes
  6. Operating valve, closure, or changeable restrictor in a well

OSCA, Inc.

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Method and apparatus for controlling fluid flow in a well

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Method and apparatus for production using a pressure...

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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