FR2375435A1 - Rock drill boring head - has keyhole-shaped cutter inserts with radial extensions projecting from side of boring head (NL 27.6.78) - Google Patents

Rock drill boring head - has keyhole-shaped cutter inserts with radial extensions projecting from side of boring head (NL 27.6.78)

Info

Publication number
FR2375435A1
FR2375435A1 FR7735395A FR7735395A FR2375435A1 FR 2375435 A1 FR2375435 A1 FR 2375435A1 FR 7735395 A FR7735395 A FR 7735395A FR 7735395 A FR7735395 A FR 7735395A FR 2375435 A1 FR2375435 A1 FR 2375435A1
Authority
FR
France
Prior art keywords
boring head
keyhole
radial extensions
rock drill
head
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
FR7735395A
Other languages
French (fr)
Other versions
FR2375435B3 (en
Inventor
Otto Bohm
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.)
WERKZEUGBAU GmbH
Original Assignee
WERKZEUGBAU GmbH
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 WERKZEUGBAU GmbH filed Critical WERKZEUGBAU GmbH
Publication of FR2375435A1 publication Critical patent/FR2375435A1/en
Application granted granted Critical
Publication of FR2375435B3 publication Critical patent/FR2375435B3/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

A rock drill has a boring head (9) which can be cylindrical with flutes down it, and with a sloping face with holes (15) drilled in it, into which are inserted cutting tips (10, 11). An inner set of tips (10) can be cylindrical, and an outer set (11) may have cylindrical bodies with radial extensions (13, 18) which project beyond the dia. of the head. Thus, in end elevation, the outer cutters are keyhole shaped and their bodies are parallel to the body of the head. In side elevation, the pointed tip is formed by two sloping flats. In an alternative design, a ring shaped cutter (16) has a set of only one type of inserts (17) based on the keyhole design, but with two radial extensions (18) which thus project inwards and outwards from the ring.
FR7735395A 1976-12-24 1977-11-24 Rock drill boring head - has keyhole-shaped cutter inserts with radial extensions projecting from side of boring head (NL 27.6.78) Granted FR2375435A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762658826 DE2658826C3 (en) 1976-12-24 1976-12-24 Rock drill head with pin-shaped, radial attachments-bearing cutting edges and tool for making the openings for the radial attachments in the lateral surfaces of the drill head

Publications (2)

Publication Number Publication Date
FR2375435A1 true FR2375435A1 (en) 1978-07-21
FR2375435B3 FR2375435B3 (en) 1980-08-08

Family

ID=5996623

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7735395A Granted FR2375435A1 (en) 1976-12-24 1977-11-24 Rock drill boring head - has keyhole-shaped cutter inserts with radial extensions projecting from side of boring head (NL 27.6.78)

Country Status (5)

Country Link
DE (1) DE2658826C3 (en)
DK (1) DK514777A (en)
FR (1) FR2375435A1 (en)
NL (1) NL7713777A (en)
SE (1) SE7713089L (en)

Also Published As

Publication number Publication date
NL7713777A (en) 1978-06-27
DE2658826A1 (en) 1978-06-29
FR2375435B3 (en) 1980-08-08
DK514777A (en) 1978-06-25
DE2658826C3 (en) 1980-10-23
DE2658826B2 (en) 1979-01-18
SE7713089L (en) 1978-06-25

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse