DE245831C - - Google Patents

Info

Publication number
DE245831C
DE245831C DENDAT245831D DE245831DA DE245831C DE 245831 C DE245831 C DE 245831C DE NDAT245831 D DENDAT245831 D DE NDAT245831D DE 245831D A DE245831D A DE 245831DA DE 245831 C DE245831 C DE 245831C
Authority
DE
Germany
Prior art keywords
handle
designed
drill
increasing
drilling
Prior art date
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.)
Active
Application number
DENDAT245831D
Other languages
German (de)
English (en)
Publication of DE245831C publication Critical patent/DE245831C/de
Active 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)
  • Earth Drilling (AREA)
DENDAT245831D Active DE245831C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE245831C true DE245831C (enrdf_load_stackoverflow)

Family

ID=504756

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT245831D Active DE245831C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE245831C (enrdf_load_stackoverflow)

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