4. E - Fixed Constructions
  5. 21
  6. B

Bill G. Parker

E - Fixed Constructions – 21 – B

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Drill string member and method for manufacture

E - Fixed Constructions – 21 – B
Patent

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Mud retaining valve

E - Fixed Constructions – 21 – B
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Directional drilling tool

E - Fixed Constructions – 21 – B
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Drill string member and method for manufacture

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-412710

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