4. Wells
  5. Packers or plugs
  6. With expanding anchor

David G. Dearing

Inventor

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Modular well tool system

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Retrievable packer having a positively operated support ring

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Slip releasing apparatus

Wells – Expansible anchor or casing – With wedge or cam and friction drag
Patent

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Well packer brake

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-1356348

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