NL7306519A - - Google Patents

Info

Publication number
NL7306519A
NL7306519A NL7306519A NL7306519A NL7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A
Authority
NL
Netherlands
Application number
NL7306519A
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 filed Critical
Publication of NL7306519A publication Critical patent/NL7306519A/xx

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
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry

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)
NL7306519A 1972-05-11 1973-05-10 NL7306519A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25237172A 1972-05-11 1972-05-11

Publications (1)

Publication Number Publication Date
NL7306519A true NL7306519A (fr) 1973-11-13

Family

ID=22955735

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7306519A NL7306519A (fr) 1972-05-11 1973-05-10

Country Status (2)

Country Link
FR (1) FR2184092A1 (fr)
NL (1) NL7306519A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808885C2 (de) * 1978-03-02 1986-11-20 Hawera Probst Gmbh + Co, 7980 Ravensburg Drehschlagbohrer für Gestein und dergleichen
CH626557A5 (fr) * 1978-09-28 1981-11-30 Guex Philippe & Fils Sa
DE3014693A1 (de) * 1980-04-16 1981-10-22 Hilti AG, 9494 Schaan Gesteinsbohrer

Also Published As

Publication number Publication date
FR2184092A1 (fr) 1973-12-21

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