4. Wells
  5. Valves, closures or changeable restrictors
  6. Longitudinally movable operator

David D. Szarka

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Anchor and anchor positioner assembly

Wells – Expansible anchor or casing – Spring set
Patent

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Anchor positioner assembly

Wells – Expansible anchor or casing – Spring set
Patent

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Apparatus and method for disconnecting a tail pipe and...

Wells – Cementing device
Reexamination Certificate

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Apparatus and method for disconnecting a tail pipe and...

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Apparatus and method for opening perforations in a well casing

Wells – Processes – With explosion or breaking container to implode
Patent

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Profile ID: LFUS-PAI-P-38040

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