BE650054A - - Google Patents
Info
- Publication number
- BE650054A BE650054A BE650054DA BE650054A BE 650054 A BE650054 A BE 650054A BE 650054D A BE650054D A BE 650054DA BE 650054 A BE650054 A BE 650054A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW32143U DE1891805U (en) | 1964-02-19 | 1964-02-19 | ROCK AND MINERAL DRILLS WITH MULTIPLE STEP CHISELS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE650054A true BE650054A (en) | 1964-11-03 |
Family
ID=33184975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE650054D BE650054A (en) | 1964-02-19 | 1964-07-03 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE650054A (en) |
| CH (1) | CH416513A (en) |
| DE (1) | DE1891805U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2751848C3 (en) * | 1977-11-19 | 1981-04-02 | Vereinigte Edelstahlwerke AG (VEW) Wien Niederlassung Vereinigte Edelstahlwerke AG (VEW) Verkaufsniederlassung Büderich, 4005 Merbusch | Step drill bit |
-
1964
- 1964-02-19 DE DEW32143U patent/DE1891805U/en not_active Expired
- 1964-06-18 CH CH797564A patent/CH416513A/en unknown
- 1964-07-03 BE BE650054D patent/BE650054A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1891805U (en) | 1964-04-30 |
| CH416513A (en) | 1966-07-15 |