4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
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Reduction unit of drilling motor

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

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Retrievable bit and eccentric reamer assembly

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Reverse-circulation drilling method and system

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rock drilling machine

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Roller link toggle gripper and downhole tractor

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Roller link toggle gripper and downhole tractor

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

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Roller link toggle gripper and downhole tractor

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

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Rotary and mud-powered percussive drill bit assembly and method

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

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Rotary earth boring tool

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

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Rotary fluid converter

Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy
Patent

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Rotary seal for directional drilling tools

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

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Rotating shaft seal and bearing lubricating apparatus

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

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Rotor of a screw hydraulic downhole motor, method for its produc

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

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