NL6902809A - - Google Patents
Info
- Publication number
- NL6902809A NL6902809A NL6902809A NL6902809A NL6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A NL 6902809 A NL6902809 A NL 6902809A
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means
- E21B7/203—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means using down-hole drives
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/005—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6902809A NL6902809A (forum.php) | 1969-02-22 | 1969-02-22 | |
| BE732629D BE732629A (forum.php) | 1968-05-14 | 1969-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6902809A NL6902809A (forum.php) | 1969-02-22 | 1969-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6902809A true NL6902809A (forum.php) | 1970-08-25 |
Family
ID=19806234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6902809A NL6902809A (forum.php) | 1968-05-14 | 1969-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL6902809A (forum.php) |
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1969
- 1969-02-22 NL NL6902809A patent/NL6902809A/xx unknown