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

Well packer

E - Fixed Constructions – 21 – B

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166/64

E21B 33/138 (2006.01)

Patent

CA 880713

Harry C. Ehlert

E - Fixed Constructions – 21 – B
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James H. Current

E - Fixed Constructions – 21 – B
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Camco

E - Fixed Constructions – 21 – B
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Na

G - Physics – 21 – G
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