4. Expansible chamber devices
  5. Piston
  6. Side wall portion includes peripheral axially extending...

Henry Wayne Blackwell

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Method of manufacturing an oilwell swab cup

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Oil well tool with packing means

Wells – Packers or plugs – With expanding anchor
Patent

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Oil well tool with packing means

Pipe joints or couplings – Frangible element
Patent

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Oilwell swab cup

Expansible chamber devices – Piston – Side wall portion includes peripheral axially extending...
Patent

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Stuffing box control system

Wells – Automatic
Patent

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Profile ID: LFUS-PAI-P-446870

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