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

William A. Blizzard

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Expandable metal seal for a well tool

Wells – Packers or plugs – With expanding anchor
Patent

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Failsafe gas closed safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Method and apparatus for stopping well production

Wells – Processes – Placing or shifting well part
Patent

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Safety valve

Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent

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Well tool having a metal seal and bi-directional lock

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-272484

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