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

Dagobert Feld

E - Fixed Constructions – 21 – B

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Country: Germany

Apparatus for the generation of pressure pulses in drilling...

E - Fixed Constructions – 21 – B
Patent

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Directional drilling tool

E - Fixed Constructions – 21 – B
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Double guided mud pulse valve

E - Fixed Constructions – 21 – B
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Double walled drill pipe electrical conductor

H - Electricity – 01 – R
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Drilling tool for sinking wells in underground rock formations

E - Fixed Constructions – 21 – B
Patent

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Double walled drill pipe electrical conductor

H - Electricity – 01 – R
Patent

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Profile ID: LFCA-PAI-P-1204904

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