NL7306519A - - Google Patents
Info
- Publication number
- NL7306519A NL7306519A NL7306519A NL7306519A NL7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A NL 7306519 A NL7306519 A NL 7306519A
- Authority
- NL
- Netherlands
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
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25237172A | 1972-05-11 | 1972-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7306519A true NL7306519A (en) | 1973-11-13 |
Family
ID=22955735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7306519A NL7306519A (en) | 1972-05-11 | 1973-05-10 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2184092A1 (en) |
| NL (1) | NL7306519A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2808885C2 (en) * | 1978-03-02 | 1986-11-20 | Hawera Probst Gmbh + Co, 7980 Ravensburg | Rotary percussion drills for rock and the like |
| CH626557A5 (en) * | 1978-09-28 | 1981-11-30 | Guex Philippe & Fils Sa | |
| DE3014693A1 (en) * | 1980-04-16 | 1981-10-22 | Hilti AG, 9494 Schaan | ROCK DRILL |
-
1973
- 1973-05-10 NL NL7306519A patent/NL7306519A/xx unknown
- 1973-05-10 FR FR7316993A patent/FR2184092A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2184092A1 (en) | 1973-12-21 |