4. Radiant energy
  5. Geological testing or irradiation
  6. Well testing apparatus and methods

Jianguang Du

Attorney

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Casing collar locator and method for locating casing collars

Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate

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Hydraulic braking device for turbine, turbine equipped with...

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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Neutron shielding for downhole tool

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Reexamination Certificate

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Surface formation monitoring system and method

Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3310390

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