GB2269411B - A drill string - Google Patents
A drill stringInfo
- Publication number
- GB2269411B GB2269411B GB9216635A GB9216635A GB2269411B GB 2269411 B GB2269411 B GB 2269411B GB 9216635 A GB9216635 A GB 9216635A GB 9216635 A GB9216635 A GB 9216635A GB 2269411 B GB2269411 B GB 2269411B
- Authority
- GB
- United Kingdom
- Prior art keywords
- drill string
- drill
- string
- 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 - Fee Related
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)
- 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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9216635A GB2269411B (en) | 1992-08-05 | 1992-08-05 | A drill string |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9216635A GB2269411B (en) | 1992-08-05 | 1992-08-05 | A drill string |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9216635D0 GB9216635D0 (en) | 1992-09-16 |
GB2269411A GB2269411A (en) | 1994-02-09 |
GB2269411B true GB2269411B (en) | 1996-03-06 |
Family
ID=10719869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9216635A Expired - Fee Related GB2269411B (en) | 1992-08-05 | 1992-08-05 | A drill string |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2269411B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3850191A (en) * | 1973-01-09 | 1974-11-26 | Brown Oil Tools | Check valve assembly |
US4263936A (en) * | 1979-10-09 | 1981-04-28 | Brown Oil Tools, Inc. | Erosion resistant check valve assembly |
US4294314A (en) * | 1979-12-31 | 1981-10-13 | Hydril Company | Inside blowout preventer well tool |
GB2102474A (en) * | 1981-07-13 | 1983-02-02 | Hughes Tool Co | Inside downhole blowout preventer |
WO1984001600A1 (en) * | 1982-10-12 | 1984-04-26 | Hydril Co | Retrievable inside blowout preventer valve apparatus |
-
1992
- 1992-08-05 GB GB9216635A patent/GB2269411B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3850191A (en) * | 1973-01-09 | 1974-11-26 | Brown Oil Tools | Check valve assembly |
US4263936A (en) * | 1979-10-09 | 1981-04-28 | Brown Oil Tools, Inc. | Erosion resistant check valve assembly |
US4294314A (en) * | 1979-12-31 | 1981-10-13 | Hydril Company | Inside blowout preventer well tool |
GB2102474A (en) * | 1981-07-13 | 1983-02-02 | Hughes Tool Co | Inside downhole blowout preventer |
WO1984001600A1 (en) * | 1982-10-12 | 1984-04-26 | Hydril Co | Retrievable inside blowout preventer valve apparatus |
Also Published As
Publication number | Publication date |
---|---|
GB2269411A (en) | 1994-02-09 |
GB9216635D0 (en) | 1992-09-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20090805 |