RO54725A2 - - Google Patents
Info
- Publication number
- RO54725A2 RO54725A2 RO6504570A RO6504570A RO54725A2 RO 54725 A2 RO54725 A2 RO 54725A2 RO 6504570 A RO6504570 A RO 6504570A RO 6504570 A RO6504570 A RO 6504570A RO 54725 A2 RO54725 A2 RO 54725A2
- Authority
- RO
- Romania
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Float Valves (AREA)
- Check Valves (AREA)
- Lift Valve (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO6504570A RO54725A2 (ro) | 1970-11-20 | 1970-11-20 | |
| DE19712157403 DE2157403C3 (de) | 1970-11-20 | 1971-11-19 | Zementierrohrschuh |
| FR7141520A FR2115286A1 (en) | 1970-11-20 | 1971-11-19 | Cement-lining tube shoe - for casing boreholes with replaceable valve components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO6504570A RO54725A2 (ro) | 1970-11-20 | 1970-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO54725A2 true RO54725A2 (ro) | 1973-09-20 |
Family
ID=20088357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO6504570A RO54725A2 (ro) | 1970-11-20 | 1970-11-20 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2157403C3 (ro) |
| FR (1) | FR2115286A1 (ro) |
| RO (1) | RO54725A2 (ro) |
-
1970
- 1970-11-20 RO RO6504570A patent/RO54725A2/ro unknown
-
1971
- 1971-11-19 DE DE19712157403 patent/DE2157403C3/de not_active Expired
- 1971-11-19 FR FR7141520A patent/FR2115286A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2157403C3 (de) | 1974-01-24 |
| FR2115286B1 (ro) | 1976-06-04 |
| DE2157403B2 (de) | 1973-06-28 |
| FR2115286A1 (en) | 1972-07-07 |
| DE2157403A1 (de) | 1972-07-06 |