FI892721A0 - Borrbett. - Google Patents

Borrbett.

Info

Publication number
FI892721A0
FI892721A0 FI892721A FI892721A FI892721A0 FI 892721 A0 FI892721 A0 FI 892721A0 FI 892721 A FI892721 A FI 892721A FI 892721 A FI892721 A FI 892721A FI 892721 A0 FI892721 A0 FI 892721A0
Authority
FI
Finland
Prior art keywords
borrbett
Prior art date
Application number
FI892721A
Other languages
English (en)
Other versions
FI892721A (fi
Inventor
Vincent Cunningham Tyler
Original Assignee
Boart Int Ltd
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 Boart Int Ltd filed Critical Boart Int Ltd
Publication of FI892721A0 publication Critical patent/FI892721A0/fi
Publication of FI892721A publication Critical patent/FI892721A/fi

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
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

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)
FI892721A 1988-06-03 1989-06-02 Borrbett. FI892721A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA883939 1988-06-03

Publications (2)

Publication Number Publication Date
FI892721A0 true FI892721A0 (fi) 1989-06-02
FI892721A FI892721A (fi) 1989-12-04

Family

ID=25579277

Family Applications (1)

Application Number Title Priority Date Filing Date
FI892721A FI892721A (fi) 1988-06-03 1989-06-02 Borrbett.

Country Status (3)

Country Link
EP (1) EP0345096A1 (fi)
FI (1) FI892721A (fi)
NO (1) NO892223L (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO316856B1 (no) * 2000-12-21 2004-06-01 Moe Per Thomas Fremgangsmåte ved boring og slagborekrone for utførelse av denne
GB2516626B (en) * 2013-07-25 2018-01-10 Padley & Venables Ltd Percussive Drill Bit
CN104329029A (zh) * 2014-11-25 2015-02-04 安徽理工大学 一种冲击钻头
EP3760828B1 (en) 2019-07-05 2022-04-20 Sandvik Mining and Construction Tools AB Drill bit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR983901A (fr) * 1948-04-30 1951-06-29 Joy Mfg Co Perfectionnement aux trépans ou fleurets à perforer les roches
US4296825A (en) * 1977-11-25 1981-10-27 Sandvik Aktiebolag Rock drill
US4304312A (en) * 1980-01-11 1981-12-08 Sandvik Aktiebolag Percussion drill bit having centrally projecting insert
SE452636B (sv) * 1983-09-20 1987-12-07 Santrade Ltd Bergborrkrona
US4730682A (en) * 1985-12-23 1988-03-15 Ingersoll-Rand Company Erosion resistant rock drill bit

Also Published As

Publication number Publication date
FI892721A (fi) 1989-12-04
NO892223L (no) 1989-12-04
NO892223D0 (no) 1989-06-01
EP0345096A1 (en) 1989-12-06

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: BOART INTERNATIONAL LIMITED