4. Wells
  5. Processes
  6. Cementing, plugging or consolidating

James A. Leppink

Examiner

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Abradable cutter protection

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

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Access covers for manholes

Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent

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Access valve for drill stem testing

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Patent

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Acoustically controlled subsurface safety valve system

Wells – With electrical means
Patent

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Activation mechanism for differential fill floating equipment

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Profile ID: LFUS-PAI-P-7562

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