NL42573C - - Google Patents
Info
- Publication number
- NL42573C NL42573C NL42573DA NL42573C NL 42573 C NL42573 C NL 42573C NL 42573D A NL42573D A NL 42573DA NL 42573 C NL42573 C NL 42573C
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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 |
|---|---|---|---|
| DEP68949D DE631395C (de) | 1934-02-15 | 1934-02-15 | Mitnehmer fuer hydraulische Tiefbohrzylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL42573C true NL42573C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html) |
Family
ID=7391322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL42573D NL42573C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html) | 1934-02-15 |
Country Status (3)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE833334C (de) * | 1950-09-14 | 1952-03-06 | Rautenkranz Int Hermann | Einrichtung zum Herstellen von Grossbohrloechern, insbesondere fuer bergmaennische Zwecke |
-
0
- NL NL42573D patent/NL42573C/xx active
-
1934
- 1934-02-15 DE DEP68949D patent/DE631395C/de not_active Expired
-
1935
- 1935-10-17 FR FR796447D patent/FR796447A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR796447A (fr) | 1936-04-07 |
| DE631395C (de) | 1936-06-19 |