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

Harry E. Simpson

E - Fixed Constructions – 21 – B

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Apparatus for borehole drilling

E - Fixed Constructions – 21 – B
Patent

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Earth boring bit with eccentrically formed bearing surface

E - Fixed Constructions – 21 – B
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Hydraulic line wiper

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Retrievable packer

E - Fixed Constructions – 21 – B
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Selective interval packer

E - Fixed Constructions – 21 – B
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Profile ID: LFCA-PAI-P-128430

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