DE208432C - - Google Patents
Info
- Publication number
- DE208432C DE208432C DENDAT208432D DE208432DA DE208432C DE 208432 C DE208432 C DE 208432C DE NDAT208432 D DENDAT208432 D DE NDAT208432D DE 208432D A DE208432D A DE 208432DA DE 208432 C DE208432 C DE 208432C
- Authority
- DE
- Germany
- Prior art keywords
- gaps
- drill
- pipe
- drill according
- openings
- 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 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004575 stone 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
- E21B10/00—Drill bits
- E21B10/02—Core bits
-
- 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
- E21B10/36—Percussion drill bits
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)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE208432C true DE208432C (es) |
Family
ID=470467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT208432D Active DE208432C (es) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE208432C (es) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3467209A (en) * | 1965-07-19 | 1969-09-16 | Dibotec Ag | Self-drilling anchor with enlarged bore zone |
US7227879B2 (en) | 2003-06-27 | 2007-06-05 | Nichia Corporation | Nitride semiconductor laser device having current blocking layer and method of manufacturing the same |
-
0
- DE DENDAT208432D patent/DE208432C/de active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3467209A (en) * | 1965-07-19 | 1969-09-16 | Dibotec Ag | Self-drilling anchor with enlarged bore zone |
US7227879B2 (en) | 2003-06-27 | 2007-06-05 | Nichia Corporation | Nitride semiconductor laser device having current blocking layer and method of manufacturing the same |
US7817692B2 (en) | 2003-06-27 | 2010-10-19 | Nichia Corporation | Nitride semiconductor laser device having current blocking layer and method of manufacturing the same |
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