4. Wells
  5. Expansible anchor or casing
  6. Liner hanger
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Elastomeric seal with reinforcing ring

Wells – Expansible anchor or casing – Liner hanger
Patent

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Emergency casing hanger

Wells – Expansible anchor or casing – Liner hanger
Patent

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Emergency casing hanger system

Wells – Expansible anchor or casing – Liner hanger
Patent

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Energized sealing cartridge for annulus sealing between...

Wells – Expansible anchor or casing – Liner hanger
Reexamination Certificate

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