FR1014236A - Fleuret à plusieurs étages, notamment pour le forage de roches - Google Patents

Fleuret à plusieurs étages, notamment pour le forage de roches

Info

Publication number
FR1014236A
FR1014236A FR1014236DA FR1014236A FR 1014236 A FR1014236 A FR 1014236A FR 1014236D A FR1014236D A FR 1014236DA FR 1014236 A FR1014236 A FR 1014236A
Authority
FR
France
Prior art keywords
rock drilling
foil
stage
stage foil
rock
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.)
Expired
Application number
Other languages
English (en)
Inventor
Wilhelm Plehn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAAR HARTMETALLWERKZEUGE DIPL
Original Assignee
SAAR HARTMETALLWERKZEUGE DIPL
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 by SAAR HARTMETALLWERKZEUGE DIPL filed Critical SAAR HARTMETALLWERKZEUGE DIPL
Application granted granted Critical
Publication of FR1014236A publication Critical patent/FR1014236A/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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers

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)
FR1014236D 1950-03-08 1950-03-08 Fleuret à plusieurs étages, notamment pour le forage de roches Expired FR1014236A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1014236T 1950-03-08

Publications (1)

Publication Number Publication Date
FR1014236A true FR1014236A (fr) 1952-08-12

Family

ID=9572199

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1014236D Expired FR1014236A (fr) 1950-03-08 1950-03-08 Fleuret à plusieurs étages, notamment pour le forage de roches

Country Status (1)

Country Link
FR (1) FR1014236A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561812A (en) * 1981-10-12 1985-12-31 Linden Karl H Extensible drill
US5326196A (en) * 1993-06-21 1994-07-05 Noll Robert R Pilot drill bit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561812A (en) * 1981-10-12 1985-12-31 Linden Karl H Extensible drill
US5326196A (en) * 1993-06-21 1994-07-05 Noll Robert R Pilot drill bit

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