IE870259L - Drill bits - Google Patents

Drill bits

Info

Publication number
IE870259L
IE870259L IE870259A IE25987A IE870259L IE 870259 L IE870259 L IE 870259L IE 870259 A IE870259 A IE 870259A IE 25987 A IE25987 A IE 25987A IE 870259 L IE870259 L IE 870259L
Authority
IE
Ireland
Prior art keywords
inserts
shank
drill bits
hard metal
apertures
Prior art date
Application number
IE870259A
Original Assignee
Boart Internat 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 Internat Ltd filed Critical Boart Internat Ltd
Publication of IE870259L publication Critical patent/IE870259L/en

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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)

Abstract

A drill bit has inserts (14) of hard metal as cutting and abrading elements. The bit body is formed as a hollow cylinder (10) closed at one end and adapted to be screwed to a shank (11), the closed end is pierced by forwardly tapering apertures, and complementally tapered inserts (14) are positioned in the apertures and the shank is provided with a replaceable backing plate (18) of hard metal, to abut the rear ends of the inserts. [EP0233037A2]
IE870259A 1986-02-03 1987-02-02 Drill bits IE870259L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA86769 1986-02-03

Publications (1)

Publication Number Publication Date
IE870259L true IE870259L (en) 1987-08-03

Family

ID=25578265

Family Applications (1)

Application Number Title Priority Date Filing Date
IE870259A IE870259L (en) 1986-02-03 1987-02-02 Drill bits

Country Status (5)

Country Link
EP (1) EP0233037A3 (en)
AU (1) AU6822087A (en)
FI (1) FI870454A (en)
IE (1) IE870259L (en)
NO (1) NO870356L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2434086B1 (en) * 2010-09-22 2013-05-15 Sandvik Intellectual Property AB A rock drill bit and a drilling assembly for percussive rock drilling

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE249360C (en) *
US1388490A (en) * 1920-09-18 1921-08-23 John R Suman Rotary earth-boring drill
US4085809A (en) * 1977-01-10 1978-04-25 Robert Lovell Reconditionable drill bit assembly

Also Published As

Publication number Publication date
EP0233037A3 (en) 1988-09-14
NO870356L (en) 1987-08-04
NO870356D0 (en) 1987-01-28
FI870454A (en) 1987-08-04
EP0233037A2 (en) 1987-08-19
FI870454A0 (en) 1987-02-02
AU6822087A (en) 1988-08-04

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