BE441002A - - Google Patents

Info

Publication number
BE441002A
BE441002A BE441002DA BE441002A BE 441002 A BE441002 A BE 441002A BE 441002D A BE441002D A BE 441002DA BE 441002 A BE441002 A BE 441002A
Authority
BE
Belgium
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE441002A publication Critical patent/BE441002A/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
BE441002D 1940-03-27 BE441002A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE220151X 1940-03-27

Publications (1)

Publication Number Publication Date
BE441002A true BE441002A (enrdf_load_html_response)

Family

ID=5832914

Family Applications (1)

Application Number Title Priority Date Filing Date
BE441002D BE441002A (enrdf_load_html_response) 1940-03-27

Country Status (3)

Country Link
BE (1) BE441002A (enrdf_load_html_response)
CH (1) CH220151A (enrdf_load_html_response)
FR (1) FR871080A (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924202C (de) * 1952-10-26 1955-02-28 Friedrich Heinrich Flottmann F Bohrhammer

Also Published As

Publication number Publication date
CH220151A (de) 1942-03-31
FR871080A (fr) 1942-04-07

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