FR378227A - Trépan à deux ou plusieurs lames d'élargissement - Google Patents

Trépan à deux ou plusieurs lames d'élargissement

Info

Publication number
FR378227A
FR378227A FR378227A FR378227DA FR378227A FR 378227 A FR378227 A FR 378227A FR 378227 A FR378227 A FR 378227A FR 378227D A FR378227D A FR 378227DA FR 378227 A FR378227 A FR 378227A
Authority
FR
France
Prior art keywords
trephine
widening blades
widening
blades
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
FR378227A
Other languages
English (en)
Inventor
Alexander Beldiman
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 FR378227A publication Critical patent/FR378227A/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
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools

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)
FR378227A 1907-05-29 1907-05-29 Trépan à deux ou plusieurs lames d'élargissement Expired FR378227A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR378227T 1907-05-29

Publications (1)

Publication Number Publication Date
FR378227A true FR378227A (fr) 1907-09-27

Family

ID=1424596

Family Applications (1)

Application Number Title Priority Date Filing Date
FR378227A Expired FR378227A (fr) 1907-05-29 1907-05-29 Trépan à deux ou plusieurs lames d'élargissement

Country Status (1)

Country Link
FR (1) FR378227A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758819A (en) * 1954-08-25 1956-08-14 Rotary Oil Tool Company Hydraulically expansible drill bits
US2814463A (en) * 1954-08-25 1957-11-26 Rotary Oil Tool Company Expansible drill bit with indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758819A (en) * 1954-08-25 1956-08-14 Rotary Oil Tool Company Hydraulically expansible drill bits
US2814463A (en) * 1954-08-25 1957-11-26 Rotary Oil Tool Company Expansible drill bit with indicator

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