4. Boring or penetrating the earth
  5. With tool shaft detail
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Fixed-contact stabilizer

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Flexible drill string member

Boring or penetrating the earth – With tool shaft detail
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Flexible drill string member especially for use in directional d

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Fluid controlled adjustable down-hole tool

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Footing auger

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Free flow stabilizer

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Friction reducing tool and method for its use in a wellbore

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Friction reducing tool for oilfield drilling applications

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Friction-reducing drill pipe component

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Frictional vibration damper for downhole tools

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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