JPS58124580U - 二重管式ドリルロツド - Google Patents

二重管式ドリルロツド

Info

Publication number
JPS58124580U
JPS58124580U JP1971682U JP1971682U JPS58124580U JP S58124580 U JPS58124580 U JP S58124580U JP 1971682 U JP1971682 U JP 1971682U JP 1971682 U JP1971682 U JP 1971682U JP S58124580 U JPS58124580 U JP S58124580U
Authority
JP
Japan
Prior art keywords
tube
circumferential surface
drill rod
outer tube
protrusion
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
JP1971682U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6239182Y2 (enrdf_load_stackoverflow
Inventor
三上　芳一
Original Assignee
古河鉱業株式会社
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 古河鉱業株式会社 filed Critical 古河鉱業株式会社
Priority to JP1971682U priority Critical patent/JPS58124580U/ja
Publication of JPS58124580U publication Critical patent/JPS58124580U/ja
Application granted granted Critical
Publication of JPS6239182Y2 publication Critical patent/JPS6239182Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP1971682U 1982-02-15 1982-02-15 二重管式ドリルロツド Granted JPS58124580U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1971682U JPS58124580U (ja) 1982-02-15 1982-02-15 二重管式ドリルロツド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971682U JPS58124580U (ja) 1982-02-15 1982-02-15 二重管式ドリルロツド

Publications (2)

Publication Number Publication Date
JPS58124580U true JPS58124580U (ja) 1983-08-24
JPS6239182Y2 JPS6239182Y2 (enrdf_load_stackoverflow) 1987-10-06

Family

ID=30031913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1971682U Granted JPS58124580U (ja) 1982-02-15 1982-02-15 二重管式ドリルロツド

Country Status (1)

Country Link
JP (1) JPS58124580U (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195194A (ja) * 1984-10-17 1986-05-13 玉田　真作育 拡孔ビツト

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195194A (ja) * 1984-10-17 1986-05-13 玉田　真作育 拡孔ビツト

Also Published As

Publication number Publication date
JPS6239182Y2 (enrdf_load_stackoverflow) 1987-10-06

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