4. Wells
  5. Valves, closures or changeable restrictors
  6. Longitudinally movable operator

Goldstein & Healey L.L.P.

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Axial equalizing valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate

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Redundant drawworks

Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate

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Well lock with multiple shear planes and related methods

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Wellbore flow control device

Wells – With electrical means – Indicating
Reexamination Certificate

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