JPH0439349Y2 - - Google Patents

Info

Publication number
JPH0439349Y2
JPH0439349Y2 JP6531587U JP6531587U JPH0439349Y2 JP H0439349 Y2 JPH0439349 Y2 JP H0439349Y2 JP 6531587 U JP6531587 U JP 6531587U JP 6531587 U JP6531587 U JP 6531587U JP H0439349 Y2 JPH0439349 Y2 JP H0439349Y2
Authority
JP
Japan
Prior art keywords
drill rod
ring
rod
port
drill
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
JP6531587U
Other languages
English (en)
Japanese (ja)
Other versions
JPS63176193U (enrdf_load_stackoverflow
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 filed Critical
Priority to JP6531587U priority Critical patent/JPH0439349Y2/ja
Publication of JPS63176193U publication Critical patent/JPS63176193U/ja
Application granted granted Critical
Publication of JPH0439349Y2 publication Critical patent/JPH0439349Y2/ja
Expired legal-status Critical Current

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Landscapes

  • Earth Drilling (AREA)
JP6531587U 1987-05-01 1987-05-01 Expired JPH0439349Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6531587U JPH0439349Y2 (enrdf_load_stackoverflow) 1987-05-01 1987-05-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6531587U JPH0439349Y2 (enrdf_load_stackoverflow) 1987-05-01 1987-05-01

Publications (2)

Publication Number Publication Date
JPS63176193U JPS63176193U (enrdf_load_stackoverflow) 1988-11-15
JPH0439349Y2 true JPH0439349Y2 (enrdf_load_stackoverflow) 1992-09-14

Family

ID=30902270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6531587U Expired JPH0439349Y2 (enrdf_load_stackoverflow) 1987-05-01 1987-05-01

Country Status (1)

Country Link
JP (1) JPH0439349Y2 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS63176193U (enrdf_load_stackoverflow) 1988-11-15

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