CH551535A - Fallmeissel mit bohrrohr zur bohrlocherweiterung. - Google Patents

Fallmeissel mit bohrrohr zur bohrlocherweiterung.

Info

Publication number
CH551535A
CH551535A CH432572A CH432572A CH551535A CH 551535 A CH551535 A CH 551535A CH 432572 A CH432572 A CH 432572A CH 432572 A CH432572 A CH 432572A CH 551535 A CH551535 A CH 551535A
Authority
CH
Switzerland
Prior art keywords
drilling
chisel
drop
extension
tube
Prior art date
Application number
CH432572A
Other languages
English (en)
Original Assignee
Hochstrasser Wack Elisabeth
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.)
Filing date
Publication date
Priority claimed from DE19712117619 external-priority patent/DE2117619C/de
Application filed by Hochstrasser Wack Elisabeth filed Critical Hochstrasser Wack Elisabeth
Publication of CH551535A publication Critical patent/CH551535A/de

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
    • E21B11/00—Other drilling tools
    • E21B11/02—Boring rams
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
CH432572A 1971-04-05 1972-03-23 Fallmeissel mit bohrrohr zur bohrlocherweiterung. CH551535A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712117619 DE2117619C (de) 1971-04-05 Der Bohrlocherweiterung die nender Fallmeißel fur Bohrlocher, insbesondere zum Herstellen von Bohrpfahlen

Publications (1)

Publication Number Publication Date
CH551535A true CH551535A (de) 1974-07-15

Family

ID=5804462

Family Applications (1)

Application Number Title Priority Date Filing Date
CH432572A CH551535A (de) 1971-04-05 1972-03-23 Fallmeissel mit bohrrohr zur bohrlocherweiterung.

Country Status (3)

Country Link
CH (1) CH551535A (de)
DE (1) DE2117619B1 (de)
IT (1) IT952520B (de)

Also Published As

Publication number Publication date
DE2117619B1 (de) 1972-08-24
IT952520B (it) 1973-07-30

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Legal Events

Date Code Title Description
PL Patent ceased