DE277803C - - Google Patents
Info
- Publication number
- DE277803C DE277803C DENDAT277803D DE277803DA DE277803C DE 277803 C DE277803 C DE 277803C DE NDAT277803 D DENDAT277803 D DE NDAT277803D DE 277803D A DE277803D A DE 277803DA DE 277803 C DE277803 C DE 277803C
- Authority
- DE
- Germany
- Prior art keywords
- knives
- ring
- head
- drill
- knife
- 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 3
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
- E21B10/00—Drill bits
- E21B10/02—Core bits
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE277803C true DE277803C (enrdf_load_stackoverflow) |
Family
ID=533872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT277803D Active DE277803C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE277803C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT277803D patent/DE277803C/de active Active
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