JPS6239182Y2 - - Google Patents
Info
- Publication number
- JPS6239182Y2 JPS6239182Y2 JP1971682U JP1971682U JPS6239182Y2 JP S6239182 Y2 JPS6239182 Y2 JP S6239182Y2 JP 1971682 U JP1971682 U JP 1971682U JP 1971682 U JP1971682 U JP 1971682U JP S6239182 Y2 JPS6239182 Y2 JP S6239182Y2
- Authority
- JP
- Japan
- Prior art keywords
- outer tube
- bit
- circumferential surface
- rod
- inner rod
- 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 16
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1971682U JPS58124580U (ja) | 1982-02-15 | 1982-02-15 | 二重管式ドリルロツド |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1971682U JPS58124580U (ja) | 1982-02-15 | 1982-02-15 | 二重管式ドリルロツド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58124580U JPS58124580U (ja) | 1983-08-24 |
| JPS6239182Y2 true JPS6239182Y2 (ko) | 1987-10-06 |
Family
ID=30031913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1971682U Granted JPS58124580U (ja) | 1982-02-15 | 1982-02-15 | 二重管式ドリルロツド |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58124580U (ko) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195194A (ja) * | 1984-10-17 | 1986-05-13 | 玉田 真作育 | 拡孔ビツト |
-
1982
- 1982-02-15 JP JP1971682U patent/JPS58124580U/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58124580U (ja) | 1983-08-24 |
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