DE157878C - - Google Patents
Info
- Publication number
- DE157878C DE157878C DENDAT157878D DE157878DA DE157878C DE 157878 C DE157878 C DE 157878C DE NDAT157878 D DENDAT157878 D DE NDAT157878D DE 157878D A DE157878D A DE 157878DA DE 157878 C DE157878 C DE 157878C
- Authority
- DE
- Germany
- Prior art keywords
- drum
- cylinder
- air
- piston
- space
- Prior art date
- 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.)
- Active
Links
- 238000005553 drilling Methods 0.000 claims description 9
- 239000000872 buffer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE157878C true DE157878C (da) |
Family
ID=424104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT157878D Active DE157878C (da) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE157878C (da) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2904665A1 (de) * | 1979-02-08 | 1980-08-14 | Hans Maul | Spezialstativ fuer schwere foto und filmkameras |
-
0
- DE DENDAT157878D patent/DE157878C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2904665A1 (de) * | 1979-02-08 | 1980-08-14 | Hans Maul | Spezialstativ fuer schwere foto und filmkameras |
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