JPS569583A - Bit for slidinggdown bottommexcavation drilling - Google Patents

Bit for slidinggdown bottommexcavation drilling

Info

Publication number
JPS569583A
JPS569583A JP8469379A JP8469379A JPS569583A JP S569583 A JPS569583 A JP S569583A JP 8469379 A JP8469379 A JP 8469379A JP 8469379 A JP8469379 A JP 8469379A JP S569583 A JPS569583 A JP S569583A
Authority
JP
Japan
Prior art keywords
slidinggdown
bottommexcavation
drilling
bit
slidinggdown bottommexcavation
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
JP8469379A
Other languages
Japanese (ja)
Other versions
JPS5939033B2 (en
Inventor
Hachirou Inoue
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 JP54084693A priority Critical patent/JPS5939033B2/en
Publication of JPS569583A publication Critical patent/JPS569583A/en
Publication of JPS5939033B2 publication Critical patent/JPS5939033B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP54084693A 1979-07-03 1979-07-03 Sliding type bottom expansion method bit Expired JPS5939033B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54084693A JPS5939033B2 (en) 1979-07-03 1979-07-03 Sliding type bottom expansion method bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54084693A JPS5939033B2 (en) 1979-07-03 1979-07-03 Sliding type bottom expansion method bit

Publications (2)

Publication Number Publication Date
JPS569583A true JPS569583A (en) 1981-01-31
JPS5939033B2 JPS5939033B2 (en) 1984-09-20

Family

ID=13837740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54084693A Expired JPS5939033B2 (en) 1979-07-03 1979-07-03 Sliding type bottom expansion method bit

Country Status (1)

Country Link
JP (1) JPS5939033B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245043U (en) * 1975-09-19 1977-03-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245043U (en) * 1975-09-19 1977-03-30

Also Published As

Publication number Publication date
JPS5939033B2 (en) 1984-09-20

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