4. Communications: electrical
  5. Wellbore telemetering or control
  6. Using a specific transmission medium

Daniel G. Purkis

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Digital hydraulic well control system

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Hydraulic well control system

Wells – With below and above ground modification – Above ground actuating means for below ground device
Reexamination Certificate

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Hydraulically actuated control system for use in a...

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Hydraulically operated fluid metering apparatus for use in a...

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

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Method and apparatus for use with two or more hydraulic...

Wells – Processes – Parallel string or multiple completion well
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2579774

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