4. Wells
  5. Processes
  6. Placing or shifting well part

Roland R. Freiheit

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Port collar assembly for use in a wellbore

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate

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Two-stage downhole packer

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2582142

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