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

David Hebert

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Fluid actuated circulating sub

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

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Ring mill apparatus and method

Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2201085

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