4. Boring or penetrating the earth
  5. Boring without earth removal
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Coiled tubing tools for jet drilling of deviated wells

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Convertible vibratory or rotary core drill apparatus

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Core drilling method and apparatus

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Core sampler apparatus with specific attachment means

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Core sampling method and core sampler therefor

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Corer-grinder

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Coring bit and method for obtaining a material core sample

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Coupling for dual member pipe

Boring or penetrating the earth – Boring without earth removal
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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