DE170716C - - Google Patents
Info
- Publication number
- DE170716C DE170716C DENDAT170716D DE170716DA DE170716C DE 170716 C DE170716 C DE 170716C DE NDAT170716 D DENDAT170716 D DE NDAT170716D DE 170716D A DE170716D A DE 170716DA DE 170716 C DE170716 C DE 170716C
- Authority
- DE
- Germany
- Prior art keywords
- rock
- lever
- foot lever
- hammer
- blow
- 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
- 239000011435 rock Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 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
- 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
- E21B6/08—Separate drives for percussion and rotation
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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE170716C true DE170716C (enrdf_load_html_response) |
Family
ID=435739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT170716D Active DE170716C (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE170716C (enrdf_load_html_response) |
-
0
- DE DENDAT170716D patent/DE170716C/de active Active
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