4. Wells
  5. Processes
  6. Graveling or filter forming

David A. Hejl

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Apparatus and method for gravel packing an interval of a...

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Apparatus and method for gravel packing an interval of a...

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Apparatus and method for treating an interval of a wellbore

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Bi-directional fluid loss device and method

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Gravel packing apparatus having an integrated joint...

Wells – Means for forming filter beds
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2673526

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