JPS5724789A - Method of expanding small-diameter hole gradually circulating mud water - Google Patents

Method of expanding small-diameter hole gradually circulating mud water

Info

Publication number
JPS5724789A
JPS5724789A JP9682180A JP9682180A JPS5724789A JP S5724789 A JPS5724789 A JP S5724789A JP 9682180 A JP9682180 A JP 9682180A JP 9682180 A JP9682180 A JP 9682180A JP S5724789 A JPS5724789 A JP S5724789A
Authority
JP
Japan
Prior art keywords
diameter hole
mud water
hole gradually
circulating mud
expanding small
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
JP9682180A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6221955B2 (enrdf_load_stackoverflow
Inventor
Nobuo Miyajima
Yasuo Sasaki
Hisashi Hasegawa
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP9682180A priority Critical patent/JPS5724789A/ja
Publication of JPS5724789A publication Critical patent/JPS5724789A/ja
Publication of JPS6221955B2 publication Critical patent/JPS6221955B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP9682180A 1980-07-17 1980-07-17 Method of expanding small-diameter hole gradually circulating mud water Granted JPS5724789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9682180A JPS5724789A (en) 1980-07-17 1980-07-17 Method of expanding small-diameter hole gradually circulating mud water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9682180A JPS5724789A (en) 1980-07-17 1980-07-17 Method of expanding small-diameter hole gradually circulating mud water

Publications (2)

Publication Number Publication Date
JPS5724789A true JPS5724789A (en) 1982-02-09
JPS6221955B2 JPS6221955B2 (enrdf_load_stackoverflow) 1987-05-15

Family

ID=14175234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9682180A Granted JPS5724789A (en) 1980-07-17 1980-07-17 Method of expanding small-diameter hole gradually circulating mud water

Country Status (1)

Country Link
JP (1) JPS5724789A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092439A (ja) * 2005-09-29 2007-04-12 Dowa Construction Co Ltd 立坑掘削工法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092439A (ja) * 2005-09-29 2007-04-12 Dowa Construction Co Ltd 立坑掘削工法

Also Published As

Publication number Publication date
JPS6221955B2 (enrdf_load_stackoverflow) 1987-05-15

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