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SE9100404L - PROCEDURE AND DEVICE FOR GRINDING BORRBITS - Google Patents

PROCEDURE AND DEVICE FOR GRINDING BORRBITS

Info

Publication number
SE9100404L
SE9100404L SE9100404A SE9100404A SE9100404L SE 9100404 L SE9100404 L SE 9100404L SE 9100404 A SE9100404 A SE 9100404A SE 9100404 A SE9100404 A SE 9100404A SE 9100404 L SE9100404 L SE 9100404L
Authority
SE
Sweden
Prior art keywords
grinding
borrbits
procedure
disclosed
chisel
Prior art date
Application number
SE9100404A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9100404D0 (en
Inventor
D S Willians
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 SE9100404D0 publication Critical patent/SE9100404D0/en
Publication of SE9100404L publication Critical patent/SE9100404L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/33—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of drills for stone
    • 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
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

Hardmetal buttons 21, 25 on a drill bit are restored by forming their heads to a chisel shape. Various chisel shapes and a machine for the purpose are disclosed. Also disclosed are grinding wheels having peripheral V-grooves for the purpose, and a method and means for simultaneously dressing the steel of the bit body. <IMAGE>
SE9100404A 1990-02-14 1991-02-11 PROCEDURE AND DEVICE FOR GRINDING BORRBITS SE9100404L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA901118 1990-02-14
ZA906616 1990-08-21

Publications (2)

Publication Number Publication Date
SE9100404D0 SE9100404D0 (en) 1991-02-11
SE9100404L true SE9100404L (en) 1991-08-15

Family

ID=67396391

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9100404A SE9100404L (en) 1990-02-14 1991-02-11 PROCEDURE AND DEVICE FOR GRINDING BORRBITS

Country Status (12)

Country Link
KR (1) KR910015368A (en)
AU (1) AU7099791A (en)
CA (1) CA2036284A1 (en)
DE (1) DE4104551A1 (en)
FI (1) FI910706A (en)
FR (1) FR2658106A1 (en)
GB (1) GB2240940A (en)
IE (1) IE910433A1 (en)
IT (1) IT1244731B (en)
NO (1) NO910583L (en)
SE (1) SE9100404L (en)
ZW (1) ZW1091A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463754B (en) * 1989-05-24 1991-01-21 Inovac Ab DEVICE FOR HANDHALLEN GRINDING MACHINE FOR GRIPPING CUTTER DRILLS

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442342A (en) * 1967-07-06 1969-05-06 Hughes Tool Co Specially shaped inserts for compact rock bits,and rolling cutters and rock bits using such inserts
US3830020A (en) * 1969-10-22 1974-08-20 S Gomi Grinding diamond wheel, and method of making same
US4254840A (en) * 1978-10-05 1981-03-10 Reed Tool Company Drill bit insert
SE434356B (en) * 1981-11-24 1984-07-23 Finsliparna Ab Arrangement for grinding of drill bits
FI67500C (en) * 1983-09-12 1985-04-10 Airam Ab Oy ANORDNING FOER VAESSNING AV STIFTKRONA FOER BERGSBORR
GB2193456B (en) * 1986-07-25 1990-06-06 Boart Int Ltd Restoration of drill buttons
US4722405A (en) * 1986-10-01 1988-02-02 Dresser Industries, Inc. Wear compensating rock bit insert

Also Published As

Publication number Publication date
FI910706A0 (en) 1991-02-13
FI910706A (en) 1991-08-15
KR910015368A (en) 1991-09-30
GB2240940A (en) 1991-08-21
FR2658106A1 (en) 1991-08-16
ITMI910364A1 (en) 1992-08-13
IT1244731B (en) 1994-08-08
ZW1091A1 (en) 1991-05-08
SE9100404D0 (en) 1991-02-11
NO910583D0 (en) 1991-02-13
GB9102944D0 (en) 1991-03-27
AU7099791A (en) 1991-08-15
CA2036284A1 (en) 1991-08-15
IE910433A1 (en) 1991-09-11
DE4104551A1 (en) 1991-08-22
ITMI910364A0 (en) 1991-02-13
NO910583L (en) 1991-08-15

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Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 9100404-4

Effective date: 19930730