DE138619C - - Google Patents

Info

Publication number
DE138619C
DE138619C DENDAT138619D DE138619DA DE138619C DE 138619 C DE138619 C DE 138619C DE NDAT138619 D DENDAT138619 D DE NDAT138619D DE 138619D A DE138619D A DE 138619DA DE 138619 C DE138619 C DE 138619C
Authority
DE
Germany
Prior art keywords
ring
cutting edges
drill
drill shaft
cutting
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
DENDAT138619D
Other languages
German (de)
English (en)
Publication of DE138619C publication Critical patent/DE138619C/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)
  • Earth Drilling (AREA)
DENDAT138619D Active DE138619C (enExample)

Publications (1)

Publication Number Publication Date
DE138619C true DE138619C (enExample)

Family

ID=406417

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT138619D Active DE138619C (enExample)

Country Status (1)

Country Link
DE (1) DE138619C (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650071A (en) * 1950-03-10 1953-08-25 Central Mine Equipment Company Mining drill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650071A (en) * 1950-03-10 1953-08-25 Central Mine Equipment Company Mining drill

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