EP0233037A3 - Drill bit with removable inserts - Google Patents

Drill bit with removable inserts

Info

Publication number
EP0233037A3
EP0233037A3 EP87300927A EP87300927A EP0233037A3 EP 0233037 A3 EP0233037 A3 EP 0233037A3 EP 87300927 A EP87300927 A EP 87300927A EP 87300927 A EP87300927 A EP 87300927A EP 0233037 A3 EP0233037 A3 EP 0233037A3
Authority
EP
European Patent Office
Prior art keywords
drill bit
inserts
removable inserts
shank
hard metal
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.)
Withdrawn
Application number
EP87300927A
Other languages
German (de)
French (fr)
Other versions
EP0233037A2 (en
Inventor
Richard Swiegers
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.)
Boart International Ltd
Original Assignee
Boart International 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 International Ltd filed Critical Boart International Ltd
Publication of EP0233037A2 publication Critical patent/EP0233037A2/en
Publication of EP0233037A3 publication Critical patent/EP0233037A3/en
Withdrawn legal-status Critical Current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
    • E21B10/62—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.
EP87300927A 1986-02-03 1987-02-03 Drill bit with removable inserts Withdrawn EP0233037A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA860769 1986-02-03
ZA86769 1986-02-03

Publications (2)

Publication Number Publication Date
EP0233037A2 EP0233037A2 (en) 1987-08-19
EP0233037A3 true EP0233037A3 (en) 1988-09-14

Family

ID=25578265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87300927A Withdrawn EP0233037A3 (en) 1986-02-03 1987-02-03 Drill bit with removable inserts

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

Citations (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

Patent Citations (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
NO870356L (en) 1987-08-04
FI870454A (en) 1987-08-04
EP0233037A2 (en) 1987-08-19
NO870356D0 (en) 1987-01-28
IE870259L (en) 1987-08-03
FI870454A0 (en) 1987-02-02
AU6822087A (en) 1988-08-04

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Inventor name: SWIEGERS, RICHARD