DE147805C - - Google Patents

Info

Publication number
DE147805C
DE147805C DENDAT147805D DE147805DA DE147805C DE 147805 C DE147805 C DE 147805C DE NDAT147805 D DENDAT147805 D DE NDAT147805D DE 147805D A DE147805D A DE 147805DA DE 147805 C DE147805 C DE 147805C
Authority
DE
Germany
Prior art keywords
drill
edges
side surfaces
drills
drilling
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
DENDAT147805D
Other languages
German (de)
English (en)
Publication of DE147805C publication Critical patent/DE147805C/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
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts

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)
  • Drilling Tools (AREA)
DENDAT147805D Active DE147805C (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
DE147805C true DE147805C (cg-RX-API-DMAC7.html)

Family

ID=414949

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT147805D Active DE147805C (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
DE (1) DE147805C (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887631C (de) * 1951-05-23 1953-08-24 Alfred Kunkel Steinbohrer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887631C (de) * 1951-05-23 1953-08-24 Alfred Kunkel Steinbohrer

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