JPS60112984A - 小口径拡孔ビット - Google Patents

小口径拡孔ビット

Info

Publication number
JPS60112984A
JPS60112984A JP21920283A JP21920283A JPS60112984A JP S60112984 A JPS60112984 A JP S60112984A JP 21920283 A JP21920283 A JP 21920283A JP 21920283 A JP21920283 A JP 21920283A JP S60112984 A JPS60112984 A JP S60112984A
Authority
JP
Japan
Prior art keywords
outer tube
tube
hole
bit
inner tube
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
JP21920283A
Other languages
English (en)
Japanese (ja)
Other versions
JPS633113B2 (enrdf_load_stackoverflow
Inventor
玉田 真作育
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP21920283A priority Critical patent/JPS60112984A/ja
Publication of JPS60112984A publication Critical patent/JPS60112984A/ja
Publication of JPS633113B2 publication Critical patent/JPS633113B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP21920283A 1983-11-21 1983-11-21 小口径拡孔ビット Granted JPS60112984A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21920283A JPS60112984A (ja) 1983-11-21 1983-11-21 小口径拡孔ビット

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21920283A JPS60112984A (ja) 1983-11-21 1983-11-21 小口径拡孔ビット

Publications (2)

Publication Number Publication Date
JPS60112984A true JPS60112984A (ja) 1985-06-19
JPS633113B2 JPS633113B2 (enrdf_load_stackoverflow) 1988-01-21

Family

ID=16731803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21920283A Granted JPS60112984A (ja) 1983-11-21 1983-11-21 小口径拡孔ビット

Country Status (1)

Country Link
JP (1) JPS60112984A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014159093A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159095A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159092A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159096A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2017105199A (ja) * 2017-01-18 2017-06-15 Fsテクニカル株式会社 拡径用ドリルビット

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014159093A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159095A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159092A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2014159096A (ja) * 2013-02-19 2014-09-04 Fs Technical Corp 拡径用ドリルビット
JP2017105199A (ja) * 2017-01-18 2017-06-15 Fsテクニカル株式会社 拡径用ドリルビット

Also Published As

Publication number Publication date
JPS633113B2 (enrdf_load_stackoverflow) 1988-01-21

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