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

Doug Brunskill

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Dual purpose blow out preventer

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Flow control valve and method of controlling rotation in a...

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

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Profile ID: LFUS-PAI-P-2972752

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