CS172329B2 - - Google Patents

Info

Publication number
CS172329B2
CS172329B2 CS382070A CS382070A CS172329B2 CS 172329 B2 CS172329 B2 CS 172329B2 CS 382070 A CS382070 A CS 382070A CS 382070 A CS382070 A CS 382070A CS 172329 B2 CS172329 B2 CS 172329B2
Authority
CS
Czechoslovakia
Application number
CS382070A
Other languages
Czech (cs)
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
Application filed filed Critical
Publication of CS172329B2 publication Critical patent/CS172329B2/cs

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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
    • 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)
CS382070A 1969-05-30 1970-06-01 CS172329B2 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT513569A AT294728B (de) 1969-05-30 1969-05-30 Versenkhammer-Bohrgerät

Publications (1)

Publication Number Publication Date
CS172329B2 true CS172329B2 (enrdf_load_stackoverflow) 1976-12-29

Family

ID=3572313

Family Applications (1)

Application Number Title Priority Date Filing Date
CS382070A CS172329B2 (enrdf_load_stackoverflow) 1969-05-30 1970-06-01

Country Status (6)

Country Link
AT (1) AT294728B (enrdf_load_stackoverflow)
BE (1) BE751227A (enrdf_load_stackoverflow)
CH (1) CH516729A (enrdf_load_stackoverflow)
CS (1) CS172329B2 (enrdf_load_stackoverflow)
DE (1) DE2025439C3 (enrdf_load_stackoverflow)
FR (1) FR2043841A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758385C3 (de) * 1977-12-28 1981-03-26 Ing. G. Klemm Bohrtechnik GmbH, 57489 Drolshagen Schlag-Bohreinrichtung für Großlochbohrungen
US6892834B1 (en) * 1999-06-18 2005-05-17 Beck, Iii August H. Piloted drill barrel and method of using same
FI115245B (fi) 2002-11-18 2005-03-31 Hannu Paasonen Teräsovitelma iskevään poraan

Also Published As

Publication number Publication date
AT294728B (de) 1971-12-10
DE2025439A1 (de) 1970-12-17
BE751227A (fr) 1970-11-03
DE2025439C3 (de) 1980-10-09
DE2025439B2 (enrdf_load_stackoverflow) 1980-02-21
CH516729A (de) 1971-12-15
FR2043841A1 (enrdf_load_stackoverflow) 1971-02-19

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