DE248922C - - Google Patents
Info
- Publication number
- DE248922C DE248922C DENDAT248922D DE248922DA DE248922C DE 248922 C DE248922 C DE 248922C DE NDAT248922 D DENDAT248922 D DE NDAT248922D DE 248922D A DE248922D A DE 248922DA DE 248922 C DE248922 C DE 248922C
- Authority
- DE
- Germany
- Prior art keywords
- drill
- ratchet
- lever
- spindle
- feed
- 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
- 239000003245 coal Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 3
- 241000131971 Bradyrhizobiaceae Species 0.000 description 1
- 238000006073 displacement reaction Methods 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
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)
- Drilling And Boring (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE248922C true DE248922C (enrdf_load_stackoverflow) |
Family
ID=507591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT248922D Active DE248922C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE248922C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT248922D patent/DE248922C/de active Active
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