4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
  6. Fluid rotary type

Vector Oil Tool Ltd.

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Adjustable bent housing

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent

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Flow restricter for mud lubricated earth drilling motors

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

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Sealed bearing assembly used in earth drilling

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

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Two way hydraulic drilling jar

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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