FR2043841A1 - - Google Patents

Info

Publication number
FR2043841A1
FR2043841A1 FR7019791A FR7019791A FR2043841A1 FR 2043841 A1 FR2043841 A1 FR 2043841A1 FR 7019791 A FR7019791 A FR 7019791A FR 7019791 A FR7019791 A FR 7019791A FR 2043841 A1 FR2043841 A1 FR 2043841A1
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.)
Withdrawn
Application number
FR7019791A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Boehler and Co AG
Original Assignee
Gebrueder Boehler and Co AG
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 by Gebrueder Boehler and Co AG filed Critical Gebrueder Boehler and Co AG
Publication of FR2043841A1 publication Critical patent/FR2043841A1/fr
Withdrawn legal-status Critical Current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
    • 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)
FR7019791A 1969-05-30 1970-05-29 Withdrawn FR2043841A1 (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
FR2043841A1 true FR2043841A1 (enrdf_load_stackoverflow) 1971-02-19

Family

ID=3572313

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7019791A Withdrawn FR2043841A1 (enrdf_load_stackoverflow) 1969-05-30 1970-05-29

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004046496A1 (en) * 2002-11-18 2004-06-03 Teijo Hulkkonen Bit assembly for a hammering drill

Families Citing this family (2)

* 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004046496A1 (en) * 2002-11-18 2004-06-03 Teijo Hulkkonen Bit assembly for a hammering drill
US7124843B2 (en) 2002-11-18 2006-10-24 Teijo Hulkkonen Bit assembly for a hammering drill

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
CS172329B2 (enrdf_load_stackoverflow) 1976-12-29
CH516729A (de) 1971-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse