4. F - Mech Eng,Light,Heat,Weapons
  5. 16
  6. J

Morris S. Biffle

F - Mech Eng,Light,Heat,Weapons – 16 – J

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Drill head and sealing apparatus therefor

F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent

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Rotary drilling head assembly

E - Fixed Constructions – 21 – B
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Rotating blowout preventor with rigid washpipe

E - Fixed Constructions – 21 – B
Patent

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Rotating blowout preventor with rigid washpipe

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-278529

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