4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Shaft carried guide or protector
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Casing tube with casing shoe

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Centering device that can be engaged or disengaged, specifically

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Clamp-on drill collar stabilizers

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Collar mounted downhole tool

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Combined stabilizer and reamer for drilling well bores

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Compensating ring for a down hole hammer

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

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Connection arrangement for a two-piece annular body

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

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