FR554495A - - Google Patents

Info

Publication number
FR554495A
FR554495A FR554495DA FR554495A FR 554495 A FR554495 A FR 554495A FR 554495D A FR554495D A FR 554495DA FR 554495 A FR554495 A FR 554495A
Authority
FR
France
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Publication date
Application granted granted Critical
Publication of FR554495A publication Critical patent/FR554495A/fr
Expired legal-status Critical Current

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
    • E21B1/00—Percussion drilling
    • E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
    • E21B1/04—Devices for reversing the movement of the rod or cable at the surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
FR554495D Expired FR554495A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
FR554495A true FR554495A (enrdf_load_stackoverflow) 1923-06-12

Family

ID=1538603

Family Applications (1)

Application Number Title Priority Date Filing Date
FR554495D Expired FR554495A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
FR (1) FR554495A (enrdf_load_stackoverflow)

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