JPH01127790A - アースドリル式拡底用回転掘削ビット装置 - Google Patents

アースドリル式拡底用回転掘削ビット装置

Info

Publication number
JPH01127790A
JPH01127790A JP28635987A JP28635987A JPH01127790A JP H01127790 A JPH01127790 A JP H01127790A JP 28635987 A JP28635987 A JP 28635987A JP 28635987 A JP28635987 A JP 28635987A JP H01127790 A JPH01127790 A JP H01127790A
Authority
JP
Japan
Prior art keywords
expansion
bit
earth
expanding
drill pipe
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
JP28635987A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0432188B2 (en, 2012
Inventor
Akira Ohashi
大橋　昭
Takashi Matsuo
隆司 松生
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.)
Konoike Construction Co Ltd
Original Assignee
Konoike Construction 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 Konoike Construction Co Ltd filed Critical Konoike Construction Co Ltd
Priority to JP28635987A priority Critical patent/JPH01127790A/ja
Publication of JPH01127790A publication Critical patent/JPH01127790A/ja
Publication of JPH0432188B2 publication Critical patent/JPH0432188B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP28635987A 1987-11-12 1987-11-12 アースドリル式拡底用回転掘削ビット装置 Granted JPH01127790A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28635987A JPH01127790A (ja) 1987-11-12 1987-11-12 アースドリル式拡底用回転掘削ビット装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28635987A JPH01127790A (ja) 1987-11-12 1987-11-12 アースドリル式拡底用回転掘削ビット装置

Publications (2)

Publication Number Publication Date
JPH01127790A true JPH01127790A (ja) 1989-05-19
JPH0432188B2 JPH0432188B2 (en, 2012) 1992-05-28

Family

ID=17703359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28635987A Granted JPH01127790A (ja) 1987-11-12 1987-11-12 アースドリル式拡底用回転掘削ビット装置

Country Status (1)

Country Link
JP (1) JPH01127790A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100880365B1 (ko) * 2008-06-10 2009-01-30 삼보이엔씨 주식회사 산업시설용 수중구조물의 수중설치를 위한 확공굴착용굴착장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100880365B1 (ko) * 2008-06-10 2009-01-30 삼보이엔씨 주식회사 산업시설용 수중구조물의 수중설치를 위한 확공굴착용굴착장치

Also Published As

Publication number Publication date
JPH0432188B2 (en, 2012) 1992-05-28

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