FR975347A - Perfectionnements aux forets rotatifs à percussion - Google Patents

Perfectionnements aux forets rotatifs à percussion

Info

Publication number
FR975347A
FR975347A FR975347DA FR975347A FR 975347 A FR975347 A FR 975347A FR 975347D A FR975347D A FR 975347DA FR 975347 A FR975347 A FR 975347A
Authority
FR
France
Prior art keywords
rotary percussion
percussion drills
drills
rotary
percussion
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)
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.)
Timken Co
Original Assignee
Timken Roller Bearing Co
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 Timken Roller Bearing Co filed Critical Timken Roller Bearing Co
Application granted granted Critical
Publication of FR975347A publication Critical patent/FR975347A/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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion

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)
FR975347D 1948-11-22 1948-11-22 Perfectionnements aux forets rotatifs à percussion Expired FR975347A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR975347T 1948-11-22

Publications (1)

Publication Number Publication Date
FR975347A true FR975347A (fr) 1951-03-05

Family

ID=9518054

Family Applications (1)

Application Number Title Priority Date Filing Date
FR975347D Expired FR975347A (fr) 1948-11-22 1948-11-22 Perfectionnements aux forets rotatifs à percussion

Country Status (1)

Country Link
FR (1) FR975347A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1027608B (de) * 1952-09-06 1958-04-10 Boehler & Co Ag Geb Bohrkrone mit in Nuten an der Bohrermantelflaeche muendenden Spuelkanaelen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1027608B (de) * 1952-09-06 1958-04-10 Boehler & Co Ag Geb Bohrkrone mit in Nuten an der Bohrermantelflaeche muendenden Spuelkanaelen

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