ZA725246B - Drill bit - Google Patents

Drill bit

Info

Publication number
ZA725246B
ZA725246B ZA725246A ZA725246A ZA725246B ZA 725246 B ZA725246 B ZA 725246B ZA 725246 A ZA725246 A ZA 725246A ZA 725246 A ZA725246 A ZA 725246A ZA 725246 B ZA725246 B ZA 725246B
Authority
ZA
South Africa
Prior art keywords
drill bit
drill
bit
Prior art date
Application number
ZA725246A
Inventor
P Schumacher
Original Assignee
Murphy Ind Inc
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 Murphy Ind Inc filed Critical Murphy Ind Inc
Publication of ZA725246B publication Critical patent/ZA725246B/en

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
    • E21B10/08—Roller bits
    • E21B10/10—Roller bits with roller axle supported at both ends
    • 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
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
ZA725246A 1971-08-20 1972-07-31 Drill bit ZA725246B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17345171A 1971-08-20 1971-08-20

Publications (1)

Publication Number Publication Date
ZA725246B true ZA725246B (en) 1973-04-25

Family

ID=22632096

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA725246A ZA725246B (en) 1971-08-20 1972-07-31 Drill bit

Country Status (7)

Country Link
US (1) US3749188A (en)
JP (1) JPS5310521B2 (en)
AU (1) AU460979B2 (en)
CA (1) CA983010A (en)
DE (1) DE2238978B2 (en)
SE (2) SE392499B (en)
ZA (1) ZA725246B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921734A (en) * 1972-10-17 1975-11-25 Kennametal Inc Raise boring head and rolling cutter arrangement therefor
US3851718A (en) * 1972-11-09 1974-12-03 Jarva Inc Roller cutter
US3835944A (en) * 1973-06-12 1974-09-17 Hard Metals Ltd Cutting unit for use on rock boring machines
SE415994B (en) * 1975-01-27 1980-11-17 Sandvik Ab DEVICE FOR ROLL DRILL
DE2809951C3 (en) * 1978-03-08 1982-04-15 Mannesmann AG, 4000 Düsseldorf Boring head for tunnel boring machines
US4193637A (en) * 1978-08-07 1980-03-18 The Robbins Company Rotary cutterhead for an earth boring machine
USRE31511E (en) 1978-08-07 1984-01-31 The Robbins Company Rotary cutterhead for an earth boring machine
US4760890A (en) * 1987-05-18 1988-08-02 Tamrock Inc. Cutter assembly for rotary boring of earth
US5421422A (en) * 1993-11-19 1995-06-06 Boretec Inc Roller cutter mount for tunneling machine
US5487435A (en) * 1994-07-07 1996-01-30 Baker Hughes Incorporated Mounting system for raise and shaft cutters
AT413047B (en) 2002-01-23 2005-10-15 Voest Alpine Bergtechnik CARRIER FOR A FLYING CUTTING DISTANCE STORAGE
US8695732B2 (en) * 2008-09-16 2014-04-15 Stu Blattner Earth-boring cutter mount and assembly
CN104110262A (en) * 2014-07-21 2014-10-22 洛阳理工学院 Drilling and rolling combination cutter disc structure for TBM (tunnel boring machine)

Also Published As

Publication number Publication date
SE392499B (en) 1977-03-28
JPS5310521B2 (en) 1978-04-14
AU460979B2 (en) 1975-05-15
JPS4829601A (en) 1973-04-19
DE2238978B2 (en) 1978-03-09
CA983010A (en) 1976-02-03
DE2238978A1 (en) 1973-03-29
SE7514252L (en) 1975-12-17
AU4514772A (en) 1974-02-07
US3749188A (en) 1973-07-31

Similar Documents

Publication Publication Date Title
CA970146A (en) Drilling
ZA722781B (en) Borer
ZA722918B (en) Anti-tracking earth boring drill
ZA722924B (en) Rock drill
CA965629A (en) Drill bit device
ZA725246B (en) Drill bit
CA964291A (en) Boring tool
ZA721312B (en) Rock drill
ZA714955B (en) Rock drill
ZA724668B (en) High torque boring machine
ZA707462B (en) Rock drill
ZM672A1 (en) Improved large diameter earth boring bit
CA946825A (en) Drill bit
GB1388182A (en) Rock boring
GB1409249A (en) Boring tools
CA868781A (en) Rock drilling bit
AU460673B2 (en) Dual purpose drill rig
ZA718674B (en) Universal drilling rig
AU424259B2 (en) Drill bit
CA880178A (en) Drill bit
AU457353B2 (en) Drill
CA870463A (en) Bits for rock drills
ZA723865B (en) Rock drilling
IE34662B1 (en) Non-rifling drill bit
CA873753A (en) Rock drill