4. Wells
  5. Processes
  6. Cleaning or unloading well

Spyro Kotsonis

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Borehole cleaning using downhole pumps

Wells – Processes – Cleaning or unloading well
Reexamination Certificate

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Directional casing drilling

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Dual tractor drilling system

Boring or penetrating the earth – With self-acting cyclic advance and retraction of tool or...
Reexamination Certificate

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Rotary steerable drilling tool

Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate

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System and method for drilling wellbores

Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2251879

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