NL42749C - - Google Patents
Info
- Publication number
- NL42749C NL42749C NL42749DA NL42749C NL 42749 C NL42749 C NL 42749C NL 42749D A NL42749D A NL 42749DA NL 42749 C NL42749 C NL 42749C
- 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 |
|---|---|---|---|
| FR796265T | 1935-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL42749C true NL42749C (en, 2012) |
Family
ID=9235047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL42749D NL42749C (en, 2012) | 1935-10-14 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR796265A (en, 2012) |
| NL (1) | NL42749C (en, 2012) |
-
0
- NL NL42749D patent/NL42749C/xx active
-
1935
- 1935-10-14 FR FR796265D patent/FR796265A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR796265A (fr) | 1936-04-03 |