FR955978A - - Google Patents
Info
- Publication number
- FR955978A FR955978A FR955978DA FR955978A FR 955978 A FR955978 A FR 955978A FR 955978D A FR955978D A FR 955978DA FR 955978 A FR955978 A FR 955978A
- Authority
- FR
- France
- 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.)
- Expired
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
- E21B10/36—Percussion drill bits
- E21B10/40—Percussion drill bits with leading portion
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR955978A true FR955978A (nl) | 1950-01-23 |
Family
ID=1558616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR955978D Expired FR955978A (nl) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR955978A (nl) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1002264B (de) * | 1952-09-29 | 1957-02-14 | Josef Dionisotti | Gesteinsdrehbohrer mit loesbar eingesetzten Schneidstaehlen |
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0
- FR FR955978D patent/FR955978A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1002264B (de) * | 1952-09-29 | 1957-02-14 | Josef Dionisotti | Gesteinsdrehbohrer mit loesbar eingesetzten Schneidstaehlen |