4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

Yong-Suk Ro

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Apparatus and method for stabilization of downhole tools

Wells – Guide for device or conduit – Surrounding existing device or tubing
Reexamination Certificate

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Apparatus and method for vibrating a drill bit

Boring or penetrating the earth – Processes
Reexamination Certificate

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Apparatus and method for vibrating a drill bit

Boring or penetrating the earth – Processes
Reexamination Certificate

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Apparatus for formation resistivity imaging in wells with...

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

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Armored flat cable signalling and instrument power acquisition

Wells – Processes – Producing the well
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Profile ID: LFUS-PAI-P-2158115

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