JPS5022962B1 - - Google Patents
Info
- Publication number
- JPS5022962B1 JPS5022962B1 JP3396870A JP3396870A JPS5022962B1 JP S5022962 B1 JPS5022962 B1 JP S5022962B1 JP 3396870 A JP3396870 A JP 3396870A JP 3396870 A JP3396870 A JP 3396870A JP S5022962 B1 JPS5022962 B1 JP S5022962B1
- Authority
- JP
- Japan
- 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.)
- Pending
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Valves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81826169A | 1969-04-22 | 1969-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5022962B1 true JPS5022962B1 (en) | 1975-08-04 |
Family
ID=25225088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3396870A Pending JPS5022962B1 (en) | 1969-04-22 | 1970-04-22 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5022962B1 (en) |
| AT (1) | AT297628B (en) |
| DE (1) | DE2017939B2 (en) |
| FR (1) | FR2039358B1 (en) |
| GB (1) | GB1266306A (en) |
| NL (1) | NL7005693A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2739801A1 (en) * | 1977-09-03 | 1979-03-15 | Waletzko Alfred Apparatebau | BACKFLOW PREVENTORS, IN PARTICULAR FOR PIPE CUTTERS |
| FR2502683A1 (en) * | 1981-03-24 | 1982-10-01 | Flopetrol | Rotary drilling method for subterranean layer - using drill string under pressure but no drilling mud |
| GB8326961D0 (en) * | 1983-10-08 | 1983-11-09 | Hogarth P J M | Bore-hole drilling device |
| DE102011082728A1 (en) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Check valve, in particular for a high-pressure fuel pump, and pump with check valve |
| CN103234067B (en) * | 2013-05-10 | 2015-11-11 | 四川宏华石油设备有限公司 | A kind of one-way valve for downhole tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1592988A (en) * | 1926-07-20 | Valve | ||
| US2023189A (en) * | 1932-01-23 | 1935-12-03 | George J Armstrong | Float valve |
| US2289946A (en) * | 1940-09-06 | 1942-07-14 | Weatherhead Co | Needle check valve |
| US2977980A (en) * | 1958-04-22 | 1961-04-04 | Axel R Scholin | Unidirectional valve for metering pumps and the like |
| NL287976A (en) * | 1962-01-22 | 1900-01-01 |
-
1970
- 1970-03-02 GB GB1266306D patent/GB1266306A/en not_active Expired
- 1970-04-15 DE DE19702017939 patent/DE2017939B2/en active Granted
- 1970-04-20 NL NL7005693A patent/NL7005693A/xx unknown
- 1970-04-21 AT AT361270A patent/AT297628B/en not_active IP Right Cessation
- 1970-04-22 JP JP3396870A patent/JPS5022962B1/ja active Pending
- 1970-04-22 FR FR7014641A patent/FR2039358B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT297628B (en) | 1972-04-10 |
| DE2017939A1 (en) | 1971-01-14 |
| DE2017939B2 (en) | 1973-03-22 |
| FR2039358A1 (en) | 1971-01-15 |
| NL7005693A (en) | 1970-10-26 |
| FR2039358B1 (en) | 1973-04-06 |
| GB1266306A (en) | 1972-03-08 |
| DE2017939C3 (en) | 1973-10-18 |