FR547312A - Bits or drills for drilling rock and other hard substances - Google Patents

Bits or drills for drilling rock and other hard substances

Info

Publication number
FR547312A
FR547312A FR547312DA FR547312A FR 547312 A FR547312 A FR 547312A FR 547312D A FR547312D A FR 547312DA FR 547312 A FR547312 A FR 547312A
Authority
FR
France
Prior art keywords
drills
bits
drilling rock
hard substances
substances
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
French (fr)
Inventor
Arthur Lee Hawkesworth
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
Application granted granted Critical
Publication of FR547312A publication Critical patent/FR547312A/en
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
    • E21B10/36—Percussion drill bits

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)
FR547312D 1921-11-21 1922-02-15 Bits or drills for drilling rock and other hard substances Expired FR547312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US189021XA 1921-11-21 1921-11-21

Publications (1)

Publication Number Publication Date
FR547312A true FR547312A (en) 1922-12-07

Family

ID=21790342

Family Applications (1)

Application Number Title Priority Date Filing Date
FR547312D Expired FR547312A (en) 1921-11-21 1922-02-15 Bits or drills for drilling rock and other hard substances

Country Status (2)

Country Link
FR (1) FR547312A (en)
GB (1) GB189021A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE912202C (en) * 1941-06-15 1954-05-28 Boehler & Co Ag Geb Rock drill or drill bit with carbide cutting edges
DE967371C (en) * 1943-07-03 1957-11-07 Boehler & Co Ag Geb Rock percussion drill for blast holes u. Like. With a pre-drilling cutting edge and a subsequent extension cutting edge
DE918741C (en) * 1949-09-03 1954-10-04 Boehler & Co Ag Geb Rock drill with single or multiple cutting edges
AT1513U1 (en) * 1995-11-23 1997-06-25 Techmo Entw & Vertriebs Gmbh DRILL BIT
DE50207010D1 (en) 2001-05-17 2006-07-06 Atlas Copco Mai Gmbh drill bit

Also Published As

Publication number Publication date
GB189021A (en) 1922-11-23

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