JPS648233B2 - - Google Patents
Info
- Publication number
- JPS648233B2 JPS648233B2 JP11289180A JP11289180A JPS648233B2 JP S648233 B2 JPS648233 B2 JP S648233B2 JP 11289180 A JP11289180 A JP 11289180A JP 11289180 A JP11289180 A JP 11289180A JP S648233 B2 JPS648233 B2 JP S648233B2
- Authority
- JP
- Japan
- Prior art keywords
- main pipe
- split joint
- drilling
- axis
- port
- 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 40
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 19
- 239000012530 fluid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11289180A JPS5737188A (en) | 1980-08-15 | 1980-08-15 | Uncutting-off type split coupling for branching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11289180A JPS5737188A (en) | 1980-08-15 | 1980-08-15 | Uncutting-off type split coupling for branching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737188A JPS5737188A (en) | 1982-03-01 |
| JPS648233B2 true JPS648233B2 (en]) | 1989-02-13 |
Family
ID=14598095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11289180A Granted JPS5737188A (en) | 1980-08-15 | 1980-08-15 | Uncutting-off type split coupling for branching |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5737188A (en]) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0358338A (ja) * | 1989-07-26 | 1991-03-13 | Matsushita Electric Ind Co Ltd | 磁気記録再生装置 |
-
1980
- 1980-08-15 JP JP11289180A patent/JPS5737188A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0358338A (ja) * | 1989-07-26 | 1991-03-13 | Matsushita Electric Ind Co Ltd | 磁気記録再生装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737188A (en) | 1982-03-01 |
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