FR570026A - - Google Patents
Info
- Publication number
- FR570026A FR570026A FR570026DA FR570026A FR 570026 A FR570026 A FR 570026A FR 570026D A FR570026D A FR 570026DA FR 570026 A FR570026 A FR 570026A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- E21B1/00—Percussion drilling
- E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
- E21B1/04—Devices for reversing the movement of the rod or cable at the surface
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR570026A true FR570026A (de) | 1924-04-22 |
Family
ID=1539210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR570026D Expired FR570026A (de) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR570026A (de) |
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0
- FR FR570026D patent/FR570026A/fr not_active Expired