4. Wells
  5. Processes
  6. Operating valve, closure, or changeable restrictor in a well

Petroleum Engineering Services Limited

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Ball valves

Wells – Above ground apparatus – Central valve or closure and lateral port
Patent

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Bridge plug

Wells – Processes – Placing or shifting well part
Patent

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Down-hole tools

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent

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Downhole pressure activated device and a method

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Packer

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-145618

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