DE301868C - - Google Patents
Info
- Publication number
- DE301868C DE301868C DENDAT301868D DE301868DA DE301868C DE 301868 C DE301868 C DE 301868C DE NDAT301868 D DENDAT301868 D DE NDAT301868D DE 301868D A DE301868D A DE 301868DA DE 301868 C DE301868 C DE 301868C
- Authority
- DE
- Germany
- Prior art keywords
- borehole
- arms
- motor
- carrier
- closes
- 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
- 238000005065 mining Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 206010067171 Regurgitation Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004804 winding 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (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 |
|---|---|
| DE301868C true DE301868C (enrdf_load_stackoverflow) |
Family
ID=555708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT301868D Active DE301868C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE301868C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT301868D patent/DE301868C/de active Active
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