BE441002A - - Google Patents
Info
- Publication number
- BE441002A BE441002A BE441002DA BE441002A BE 441002 A BE441002 A BE 441002A BE 441002D A BE441002D A BE 441002DA BE 441002 A BE441002 A BE 441002A
- Authority
- BE
- Belgium
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
- E21B6/00—Drives for drilling with combined rotary and percussive action
- E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (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 |
|---|---|---|---|
| DE220151X | 1940-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE441002A true BE441002A (sk) |
Family
ID=5832914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE441002D BE441002A (sk) | 1940-03-27 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE441002A (sk) |
| CH (1) | CH220151A (sk) |
| FR (1) | FR871080A (sk) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE924202C (de) * | 1952-10-26 | 1955-02-28 | Friedrich Heinrich Flottmann F | Bohrhammer |
-
0
- BE BE441002D patent/BE441002A/xx unknown
-
1941
- 1941-03-24 CH CH220151D patent/CH220151A/de unknown
- 1941-03-26 FR FR871080D patent/FR871080A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR871080A (fr) | 1942-04-07 |
| CH220151A (de) | 1942-03-31 |