FR378024A - Steel drill bit for compressed air punches - Google Patents

Steel drill bit for compressed air punches

Info

Publication number
FR378024A
FR378024A FR378024DA FR378024A FR 378024 A FR378024 A FR 378024A FR 378024D A FR378024D A FR 378024DA FR 378024 A FR378024 A FR 378024A
Authority
FR
France
Prior art keywords
punches
compressed air
drill bit
steel drill
steel
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
Heinrich Lind
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR378024A publication Critical patent/FR378024A/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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure

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)
FR378024D 1906-05-29 1907-05-22 Steel drill bit for compressed air punches Expired FR378024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE378024X 1906-05-29

Publications (1)

Publication Number Publication Date
FR378024A true FR378024A (en) 1907-09-21

Family

ID=1424404

Family Applications (1)

Application Number Title Priority Date Filing Date
FR378024D Expired FR378024A (en) 1906-05-29 1907-05-22 Steel drill bit for compressed air punches

Country Status (1)

Country Link
FR (1) FR378024A (en)

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