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

Roger Chancey

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Circle threadform for marine riser top joint

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent

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Hydraulic timing device

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

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Hydraulic timing device

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

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Improved mud motor system incorporating fluid bearings

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

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Profile ID: LFUS-PAI-P-1118976

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