4. Seal for a joint or juncture
  5. Seal between relatively movable parts
  6. Relatively rotatable radially extending sealing face member

Roy W. Benefield

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Pressure energized/pressure intensified casing seal

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Wellhead isolation tool

Wells – Above ground apparatus – Having structure for converting from one mode of operation...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-318100

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