DE258329C - - Google Patents
Info
- Publication number
- DE258329C DE258329C DENDAT258329D DE258329DA DE258329C DE 258329 C DE258329 C DE 258329C DE NDAT258329 D DENDAT258329 D DE NDAT258329D DE 258329D A DE258329D A DE 258329DA DE 258329 C DE258329 C DE 258329C
- Authority
- DE
- Germany
- Prior art keywords
- drill
- serpentines
- snake
- turns
- diameter
- 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
- 241000270295 Serpentes Species 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE258329C true DE258329C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=516166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT258329D Active DE258329C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE258329C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080093A (en) * | 1974-11-18 | 1978-03-21 | Hartmetallwerkzeugfabrik Andreas Maier Kg | Drill for electronic conductor plates |
| DE3317989A1 (de) * | 1983-05-18 | 1984-11-22 | Hawera Probst Gmbh + Co, 7980 Ravensburg | Bohrwerkzeug |
| US10695951B2 (en) | 2015-11-09 | 2020-06-30 | Robert Bosch Gmbh | Drilling tool |
-
0
- DE DENDAT258329D patent/DE258329C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080093A (en) * | 1974-11-18 | 1978-03-21 | Hartmetallwerkzeugfabrik Andreas Maier Kg | Drill for electronic conductor plates |
| DE3317989A1 (de) * | 1983-05-18 | 1984-11-22 | Hawera Probst Gmbh + Co, 7980 Ravensburg | Bohrwerkzeug |
| US10695951B2 (en) | 2015-11-09 | 2020-06-30 | Robert Bosch Gmbh | Drilling tool |
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