NL114978B - - Google Patents
Info
- Publication number
- NL114978B NL114978B NL114978A NL114978A NL114978B NL 114978 B NL114978 B NL 114978B NL 114978 A NL114978 A NL 114978A NL 114978 A NL114978 A NL 114978A NL 114978 B NL114978 B NL 114978B
- 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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/025—Surface drives for rotary drilling with a to-and-fro rotation of the tool
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL114978A NL114978B (es) | 1944-01-28 | 1944-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL114978A NL114978B (es) | 1944-01-28 | 1944-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL114978B true NL114978B (es) | 1948-01-02 |
Family
ID=1847844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL114978A NL114978B (es) | 1944-01-28 | 1944-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL114978B (es) |
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1944
- 1944-01-28 NL NL114978A patent/NL114978B/xx unknown