4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
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Bearing assemblies, and bearing apparatuses and motor...

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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Bearing assemblies, and bearing apparatuses and motor...

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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Bearing system for a downhole motor

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent

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Bearing system for a downhole motor

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent

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Belling apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall
Patent

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Borehole drilling apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – With above-ground means
Patent

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Borehole drilling motor with flexible shaft coupling

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...
Patent

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Boring and drilling apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – With mechanical motion-converting means
Reexamination Certificate

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Bottom hole motor for driving rock-breaking tool

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent

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Bottom-hole multistart screw motor

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent

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Bottomhole assembly and methods of use

Boring or penetrating the earth – With below-ground tool drive prime mover – Electric
Reexamination Certificate

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