FR1014236A - Fleuret à plusieurs étages, notamment pour le forage de roches - Google Patents
Fleuret à plusieurs étages, notamment pour le forage de rochesInfo
- Publication number
- FR1014236A FR1014236A FR1014236DA FR1014236A FR 1014236 A FR1014236 A FR 1014236A FR 1014236D A FR1014236D A FR 1014236DA FR 1014236 A FR1014236 A FR 1014236A
- Authority
- FR
- France
- Prior art keywords
- rock drilling
- foil
- stage
- stage foil
- rock
- 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.)
- Expired
Links
- 238000005553 drilling Methods 0.000 title 1
- 239000011888 foil Substances 0.000 title 1
- 239000011435 rock Substances 0.000 title 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
- 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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1014236T | 1950-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1014236A true FR1014236A (fr) | 1952-08-12 |
Family
ID=9572199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1014236D Expired FR1014236A (fr) | 1950-03-08 | 1950-03-08 | Fleuret à plusieurs étages, notamment pour le forage de roches |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1014236A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561812A (en) * | 1981-10-12 | 1985-12-31 | Linden Karl H | Extensible drill |
US5326196A (en) * | 1993-06-21 | 1994-07-05 | Noll Robert R | Pilot drill bit |
-
1950
- 1950-03-08 FR FR1014236D patent/FR1014236A/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561812A (en) * | 1981-10-12 | 1985-12-31 | Linden Karl H | Extensible drill |
US5326196A (en) * | 1993-06-21 | 1994-07-05 | Noll Robert R | Pilot drill bit |
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