NL42021C - - Google Patents
Info
- Publication number
- NL42021C NL42021C NL42021DA NL42021C NL 42021 C NL42021 C NL 42021C NL 42021D A NL42021D A NL 42021DA NL 42021 C NL42021 C NL 42021C
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE800360X | 1935-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL42021C true NL42021C (https=) |
Family
ID=6712774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL42021D NL42021C (https=) | 1935-02-27 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR800360A (https=) |
| NL (1) | NL42021C (https=) |
-
0
- NL NL42021D patent/NL42021C/xx active
-
1936
- 1936-01-04 FR FR800360D patent/FR800360A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR800360A (fr) | 1936-07-03 |