JPH0346589U - - Google Patents

Info

Publication number
JPH0346589U
JPH0346589U JP10694389U JP10694389U JPH0346589U JP H0346589 U JPH0346589 U JP H0346589U JP 10694389 U JP10694389 U JP 10694389U JP 10694389 U JP10694389 U JP 10694389U JP H0346589 U JPH0346589 U JP H0346589U
Authority
JP
Japan
Prior art keywords
kelly bar
groove
torque
cylindrical
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
JP10694389U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0527590Y2 (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 JP10694389U priority Critical patent/JPH0527590Y2/ja
Publication of JPH0346589U publication Critical patent/JPH0346589U/ja
Application granted granted Critical
Publication of JPH0527590Y2 publication Critical patent/JPH0527590Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP10694389U 1989-09-12 1989-09-12 Expired - Lifetime JPH0527590Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10694389U JPH0527590Y2 (enrdf_load_stackoverflow) 1989-09-12 1989-09-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10694389U JPH0527590Y2 (enrdf_load_stackoverflow) 1989-09-12 1989-09-12

Publications (2)

Publication Number Publication Date
JPH0346589U true JPH0346589U (enrdf_load_stackoverflow) 1991-04-30
JPH0527590Y2 JPH0527590Y2 (enrdf_load_stackoverflow) 1993-07-14

Family

ID=31655663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10694389U Expired - Lifetime JPH0527590Y2 (enrdf_load_stackoverflow) 1989-09-12 1989-09-12

Country Status (1)

Country Link
JP (1) JPH0527590Y2 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0527590Y2 (enrdf_load_stackoverflow) 1993-07-14

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