FR560212A - - Google Patents

Info

Publication number
FR560212A
FR560212A FR560212DA FR560212A FR 560212 A FR560212 A FR 560212A FR 560212D A FR560212D A FR 560212DA FR 560212 A FR560212 A FR 560212A
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 FR560212A publication Critical patent/FR560212A/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
    • 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
    • E21B6/08—Separate drives for percussion and rotation

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)
FR560212D Expired FR560212A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
FR560212A true FR560212A (enrdf_load_stackoverflow) 1923-10-01

Family

ID=1538833

Family Applications (1)

Application Number Title Priority Date Filing Date
FR560212D Expired FR560212A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
FR (1) FR560212A (enrdf_load_stackoverflow)

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