4. Spring devices
  5. Fluid
  6. Expansible-contractible chamber device

Gerhard Schoonderbeek

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Expandable systems that facilitate desired fluid flow

Wells – Expansible anchor or casing – Expansible casing
Reexamination Certificate

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Gun brake device

Spring devices – Fluid – Expansible-contractible chamber device
Reexamination Certificate

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Well fluid control

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2795419

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