GB2000461A - Device for exposing worn carbide tips in drill bits. - Google Patents

Device for exposing worn carbide tips in drill bits.

Info

Publication number
GB2000461A
GB2000461A GB7827871A GB7827871A GB2000461A GB 2000461 A GB2000461 A GB 2000461A GB 7827871 A GB7827871 A GB 7827871A GB 7827871 A GB7827871 A GB 7827871A GB 2000461 A GB2000461 A GB 2000461A
Authority
GB
United Kingdom
Prior art keywords
exposing
drill bits
milling head
peg
button
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.)
Granted
Application number
GB7827871A
Other versions
GB2000461B (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.)
Fagersta AB
Original Assignee
Fagersta AB
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 Fagersta AB filed Critical Fagersta AB
Publication of GB2000461A publication Critical patent/GB2000461A/en
Application granted granted Critical
Publication of GB2000461B publication Critical patent/GB2000461B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/10—Bits for countersinking
    • 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
    • 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
    • E21B12/00—Accessories for drilling 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)
  • Earth Drilling (AREA)
  • Milling Processes (AREA)

Abstract

A device for exposing worn button pegs in drill bits comprising a milling head (1) with an axial recess (3) accommodating a centering pin (2) displaceable in the axial direction of the milling head. Said pin has an inner end (5) acted on by a compression spring means (4), and an outer end projecting from the milling head. The outer end (8) of the centering pin has a bowl-shaped recess (9) with a shape which is preferably hemispherical and corresponds to the shape of the button end of the carbide peg extending out of the drill bit. The button end of said peg is enclosed by the bowl-shaped recess when exposing the body portion of the peg. <IMAGE>
GB7827871A 1977-06-28 1978-06-26 Device for exposing worn carbide tips in drill bits Expired GB2000461B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7707478A SE406283B (en) 1977-06-28 1977-06-28 DEVICE FOR EXPOSED DROUGHT CARRIED METAL PINS IN DRILL CROWN

Publications (2)

Publication Number Publication Date
GB2000461A true GB2000461A (en) 1979-01-10
GB2000461B GB2000461B (en) 1982-01-06

Family

ID=20331713

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7827871A Expired GB2000461B (en) 1977-06-28 1978-06-26 Device for exposing worn carbide tips in drill bits

Country Status (11)

Country Link
JP (1) JPS5417306A (en)
AT (1) AT357500B (en)
AU (1) AU3731878A (en)
BR (1) BR7804089A (en)
CA (1) CA1077921A (en)
DE (1) DE2826957A1 (en)
FR (1) FR2395809A1 (en)
GB (1) GB2000461B (en)
IE (1) IE47422B1 (en)
SE (1) SE406283B (en)
ZA (1) ZA783634B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941041C2 (en) * 1979-10-10 1981-07-09 Daimler-Benz Ag, 7000 Stuttgart Spot weld milling cutter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
BR7804089A (en) 1979-01-16
AT357500B (en) 1980-07-10
SE7707478L (en) 1978-12-29
SE406283B (en) 1979-02-05
IE781274L (en) 1978-12-28
GB2000461B (en) 1982-01-06
AU3731878A (en) 1980-01-03
ZA783634B (en) 1979-06-27
DE2826957A1 (en) 1979-01-18
IE47422B1 (en) 1984-03-07
ATA457678A (en) 1979-12-15
FR2395809B3 (en) 1981-03-06
FR2395809A1 (en) 1979-01-26
JPS5417306A (en) 1979-02-08
CA1077921A (en) 1980-05-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee