FR955978A - - Google Patents

Info

Publication number
FR955978A
FR955978A FR955978DA FR955978A FR 955978 A FR955978 A FR 955978A FR 955978D A FR955978D A FR 955978DA FR 955978 A FR955978 A FR 955978A
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 FR955978A publication Critical patent/FR955978A/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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion

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)
FR955978D Expired FR955978A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
FR955978A true FR955978A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1950-01-23

Family

ID=1558616

Family Applications (1)

Application Number Title Priority Date Filing Date
FR955978D Expired FR955978A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
FR (1) FR955978A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002264B (de) * 1952-09-29 1957-02-14 Josef Dionisotti Gesteinsdrehbohrer mit loesbar eingesetzten Schneidstaehlen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002264B (de) * 1952-09-29 1957-02-14 Josef Dionisotti Gesteinsdrehbohrer mit loesbar eingesetzten Schneidstaehlen

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