JPS6226389B2 - - Google Patents
Info
- Publication number
- JPS6226389B2 JPS6226389B2 JP19446081A JP19446081A JPS6226389B2 JP S6226389 B2 JPS6226389 B2 JP S6226389B2 JP 19446081 A JP19446081 A JP 19446081A JP 19446081 A JP19446081 A JP 19446081A JP S6226389 B2 JPS6226389 B2 JP S6226389B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- shaft
- oil
- drain
- hydraulic
- 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
- 238000007789 sealing Methods 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 14
- 238000009412 basement excavation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000010720 hydraulic oil Substances 0.000 description 11
- 230000005484 gravity Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19446081A JPS57119087A (en) | 1981-12-04 | 1981-12-04 | Internal/external differential pressure adjustment of underwater shaft sealing apparatus for vertical excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19446081A JPS57119087A (en) | 1981-12-04 | 1981-12-04 | Internal/external differential pressure adjustment of underwater shaft sealing apparatus for vertical excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57119087A JPS57119087A (en) | 1982-07-24 |
| JPS6226389B2 true JPS6226389B2 (enrdf_load_stackoverflow) | 1987-06-09 |
Family
ID=16324927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19446081A Granted JPS57119087A (en) | 1981-12-04 | 1981-12-04 | Internal/external differential pressure adjustment of underwater shaft sealing apparatus for vertical excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57119087A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4633454B2 (ja) * | 2004-12-17 | 2011-02-16 | 株式会社 北斗工業 | 掘削装置 |
-
1981
- 1981-12-04 JP JP19446081A patent/JPS57119087A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57119087A (en) | 1982-07-24 |
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