4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Helix or helically arranged structure

Davor Majkovic

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Drill bit reamer stabilizer

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent

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Drilling motor drill bit reaming stabilizer

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Reexamination Certificate

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Mud saver kelly valve

Fluid handling – Destructible or deformable element controlled – Destructible element
Reexamination Certificate

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Mud saver kelly valve

Fluid handling – Processes
Reexamination Certificate

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System and method for installing a liner in a borehole

Wells – Packers or plugs – With expanding anchor
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1412949

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