4. Boring or penetrating the earth
  5. Processes
  6. Boring curved or redirected bores

Jeremy Welch

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Adjustable downhole motors and methods for use

Boring or penetrating the earth – Processes
Reexamination Certificate

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Downhole data transmission apparatus and methods

Communications: electrical – Wellbore telemetering or control – Modification of signal bandwidth – frequency – or circuit...
Reexamination Certificate

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Hole depth sensing

Communications: electrical – Wellbore telemetering or control – With position or depth recording
Reexamination Certificate

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Magnetic ranging and controlled earth borehole drilling

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Reexamination Certificate

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Method and apparatus for extending flow range of a downhole...

Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Separate means upstream and downstream of blade set
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2236456

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