JPH0458557B2 - - Google Patents

Info

Publication number
JPH0458557B2
JPH0458557B2 JP3416785A JP3416785A JPH0458557B2 JP H0458557 B2 JPH0458557 B2 JP H0458557B2 JP 3416785 A JP3416785 A JP 3416785A JP 3416785 A JP3416785 A JP 3416785A JP H0458557 B2 JPH0458557 B2 JP H0458557B2
Authority
JP
Japan
Prior art keywords
rod
bit
drilling
fluid
guide shell
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
JP3416785A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61196097A (ja
Inventor
Takehisa Koyama
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.)
Furukawa Co Ltd
Original Assignee
Furukawa Co Ltd
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 Furukawa Co Ltd filed Critical Furukawa Co Ltd
Priority to JP3416785A priority Critical patent/JPS61196097A/ja
Publication of JPS61196097A publication Critical patent/JPS61196097A/ja
Publication of JPH0458557B2 publication Critical patent/JPH0458557B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
JP3416785A 1985-02-22 1985-02-22 穿孔装置 Granted JPS61196097A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3416785A JPS61196097A (ja) 1985-02-22 1985-02-22 穿孔装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3416785A JPS61196097A (ja) 1985-02-22 1985-02-22 穿孔装置

Publications (2)

Publication Number Publication Date
JPS61196097A JPS61196097A (ja) 1986-08-30
JPH0458557B2 true JPH0458557B2 (de) 1992-09-17

Family

ID=12406646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3416785A Granted JPS61196097A (ja) 1985-02-22 1985-02-22 穿孔装置

Country Status (1)

Country Link
JP (1) JPS61196097A (de)

Also Published As

Publication number Publication date
JPS61196097A (ja) 1986-08-30

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees