4. Wells
  5. Processes
  6. Placing or shifting well part

Thomas L. Pettigrew

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Force balanced rotating pressure control device

Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate

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Force balanced rotating pressure control device

Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate

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Tubing resettable well packer

Wells – Processes – Placing or shifting well part
Patent

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Profile ID: LFUS-PAI-P-729241

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