DE277803C - - Google Patents

Info

Publication number
DE277803C
DE277803C DENDAT277803D DE277803DA DE277803C DE 277803 C DE277803 C DE 277803C DE NDAT277803 D DENDAT277803 D DE NDAT277803D DE 277803D A DE277803D A DE 277803DA DE 277803 C DE277803 C DE 277803C
Authority
DE
Germany
Prior art keywords
knives
ring
head
drill
knife
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
DENDAT277803D
Other languages
German (de)
English (en)
Publication of DE277803C publication Critical patent/DE277803C/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
    • E21B10/00—Drill bits
    • E21B10/02—Core bits

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
DENDAT277803D Active DE277803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
DE277803C true DE277803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=533872

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT277803D Active DE277803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
DE (1) DE277803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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