NL77228C - - Google Patents
Info
- Publication number
- NL77228C NL77228C NL77228DA NL77228C NL 77228 C NL77228 C NL 77228C NL 77228D A NL77228D A NL 77228DA NL 77228 C NL77228 C NL 77228C
- Authority
- NL
- Netherlands
Links
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
- E21B10/08—Roller bits
- E21B10/16—Roller bits characterised by tooth form or arrangement
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH6871A DE838586C (de) | 1950-12-05 | 1950-12-05 | Drehbohrmeissel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL77228C true NL77228C (en:Method) |
Family
ID=7144840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL77228D NL77228C (en:Method) | 1950-12-05 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE499617A (en:Method) |
| CH (1) | CH300472A (en:Method) |
| DE (1) | DE838586C (en:Method) |
| FR (1) | FR1028209A (en:Method) |
| NL (1) | NL77228C (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1123637B (de) * | 1958-05-23 | 1962-02-15 | Hartmetall U Hartmetallwerkzeu | Drehbohrmeissel |
| DE1224230B (de) * | 1964-07-06 | 1966-09-08 | Soeding & Halbach J C | Schneidrolle fuer Erweiterungsrollenmeissel und andere Vorrichtungen zum Abtragen von Gestein |
-
0
- NL NL77228D patent/NL77228C/xx active
- BE BE499617D patent/BE499617A/xx unknown
-
1950
- 1950-11-20 FR FR1028209D patent/FR1028209A/fr not_active Expired
- 1950-12-05 DE DEH6871A patent/DE838586C/de not_active Expired
- 1950-12-08 CH CH300472D patent/CH300472A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE838586C (de) | 1952-05-08 |
| CH300472A (de) | 1954-08-15 |
| BE499617A (en:Method) | |
| FR1028209A (fr) | 1953-05-20 |