4. Measuring and testing
  5. Borehole or drilling
  6. Downhole test

Haoshi Song

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Apparatus for changing flowbore fluid temperature

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

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Coiled tubing connector

Electrical connectors – With coupling movement-actuating means or retaining means in... – Coupling part with relatively pivotable concentric...
Reexamination Certificate

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Cooling system for downhole tools

Ammunition and explosives – Blasting – Patterned blasting
Reexamination Certificate

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Directional resistivity measurements for azimuthal proximity...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Downhole steering tool having a non-rotating bendable section

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1238303

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