JPH0432188B2 - - Google Patents
Info
- Publication number
- JPH0432188B2 JPH0432188B2 JP28635987A JP28635987A JPH0432188B2 JP H0432188 B2 JPH0432188 B2 JP H0432188B2 JP 28635987 A JP28635987 A JP 28635987A JP 28635987 A JP28635987 A JP 28635987A JP H0432188 B2 JPH0432188 B2 JP H0432188B2
- Authority
- JP
- Japan
- Prior art keywords
- bit
- expanding
- drilling
- earth
- 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.)
- Expired
Links
- 238000005553 drilling Methods 0.000 claims description 69
- 238000009412 basement excavation Methods 0.000 claims description 31
- 239000004576 sand Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
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 JPH01127790A (ja) | 1989-05-19 |
| JPH0432188B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880365B1 (ko) * | 2008-06-10 | 2009-01-30 | 삼보이엔씨 주식회사 | 산업시설용 수중구조물의 수중설치를 위한 확공굴착용굴착장치 |
-
1987
- 1987-11-12 JP JP28635987A patent/JPH01127790A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127790A (ja) | 1989-05-19 |
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