JPS629717B2 - - Google Patents

Info

Publication number
JPS629717B2
JPS629717B2 JP12620082A JP12620082A JPS629717B2 JP S629717 B2 JPS629717 B2 JP S629717B2 JP 12620082 A JP12620082 A JP 12620082A JP 12620082 A JP12620082 A JP 12620082A JP S629717 B2 JPS629717 B2 JP S629717B2
Authority
JP
Japan
Prior art keywords
base
cutter
center line
branch
central cutter
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.)
Expired
Application number
JP12620082A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5918890A (ja
Inventor
Sho Takano
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.)
Sumitomo Metal Mining Co Ltd
Original Assignee
Sumitomo Metal Mining Co 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 Sumitomo Metal Mining Co Ltd filed Critical Sumitomo Metal Mining Co Ltd
Priority to JP12620082A priority Critical patent/JPS5918890A/ja
Priority to GB08308848A priority patent/GB2123881B/en
Priority to IT48054/83A priority patent/IT1164645B/it
Priority to FR8306173A priority patent/FR2530722B1/fr
Priority to DE3314583A priority patent/DE3314583C2/de
Publication of JPS5918890A publication Critical patent/JPS5918890A/ja
Publication of JPS629717B2 publication Critical patent/JPS629717B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP12620082A 1982-07-20 1982-07-20 地中穿孔ドリルビツト Granted JPS5918890A (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP12620082A JPS5918890A (ja) 1982-07-20 1982-07-20 地中穿孔ドリルビツト
GB08308848A GB2123881B (en) 1982-07-20 1983-03-30 Well drilling bit
IT48054/83A IT1164645B (it) 1982-07-20 1983-04-06 Punta per trivellare pozzi
FR8306173A FR2530722B1 (fr) 1982-07-20 1983-04-15 Trepan de forage a molettes avec couteau central
DE3314583A DE3314583C2 (de) 1982-07-20 1983-04-22 Bohrwerkzeug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12620082A JPS5918890A (ja) 1982-07-20 1982-07-20 地中穿孔ドリルビツト

Publications (2)

Publication Number Publication Date
JPS5918890A JPS5918890A (ja) 1984-01-31
JPS629717B2 true JPS629717B2 (enExample) 1987-03-02

Family

ID=14929179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12620082A Granted JPS5918890A (ja) 1982-07-20 1982-07-20 地中穿孔ドリルビツト

Country Status (1)

Country Link
JP (1) JPS5918890A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11741685B2 (en) 2018-06-07 2023-08-29 Shiseido Company, Ltd. Commodity identification device, non-transitory computer-readable storage medium, and learning method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11741685B2 (en) 2018-06-07 2023-08-29 Shiseido Company, Ltd. Commodity identification device, non-transitory computer-readable storage medium, and learning method

Also Published As

Publication number Publication date
JPS5918890A (ja) 1984-01-31

Similar Documents

Publication Publication Date Title
US4203496A (en) Longitudinal axis roller drill bit with gage inserts protection
US5131480A (en) Rotary cone milled tooth bit with heel row cutter inserts
FI86760B (fi) Borrverktyg.
US20090166093A1 (en) Reamer With Stabilizers For Use In A Wellbore
CA2312272A1 (en) Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage
US2184067A (en) Drill bit
US5456328A (en) Drill bit with improved rolling cutter tooth pattern
US5429201A (en) Drill bit with improved rolling cutter tooth pattern
US20030217867A1 (en) Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling
US5372209A (en) Polycentric reamer
US7066288B2 (en) Asymmetric compact for drill bit
US20150090501A1 (en) Roller cutter drill bit with mixed bearing types
JPS629717B2 (enExample)
US6298929B1 (en) Bi-center bit assembly
US1859948A (en) Bit with cutters having scraping and rolling motions
US3786879A (en) Drill bit
US6112835A (en) Drilling apparatus having a radially displaceable reamer
RU2012761C1 (ru) Полицентричный расширитель
JPS6147273B2 (enExample)
US7011169B2 (en) Expanded coverage carbide compact
RU2715574C1 (ru) Буровая коронка
JP2001146886A (ja) 掘削工具
SU1546605A1 (ru) Расширитель скважин
US1867531A (en) Deep well drilling apparatus
EP0864723A1 (en) Boring bit and boring casing