ZA975507B - Drill tube for forming drill strings. - Google Patents
Drill tube for forming drill strings.Info
- Publication number
- ZA975507B ZA975507B ZA9705507A ZA975507A ZA975507B ZA 975507 B ZA975507 B ZA 975507B ZA 9705507 A ZA9705507 A ZA 9705507A ZA 975507 A ZA975507 A ZA 975507A ZA 975507 B ZA975507 B ZA 975507B
- Authority
- ZA
- South Africa
- Prior art keywords
- drill
- restriction
- valve body
- seat
- drill tube
- Prior art date
Links
- 238000011010 flushing procedure Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 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
- 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)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Check Valves (AREA)
- Drilling Tools (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Tubes (AREA)
Abstract
In a first aspect the invention relates to a drill-string-forming drill tube which includes a channel (15) intended for passing flushing liquid, inside of which there is a restriction which forms a seat (14) for a valve body (16) serving as a check valve. Said drill tube comprises, in addition to a partly spherical skittle member (17) for engagement in the seat (14), two or more tangentially separated blocking elements (21). The purpose of said elements is, when flushing liquid is fed from the valve seat towards a second restriction distanced therefrom, to stop the valve body against said second restriction without sealing thereagainst. Therefore, one and the same drill tube may be used for upwardly directed as well as downwardly directed drilling. In a second aspect, the invention relates to the valve body as such.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9602472A SE506855C2 (en) | 1996-06-24 | 1996-06-24 | Drill pipe for forming drill strings and valve body for such drill pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA975507B true ZA975507B (en) | 1998-01-23 |
Family
ID=20403117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA9705507A ZA975507B (en) | 1996-06-24 | 1997-06-20 | Drill tube for forming drill strings. |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0907820B1 (en) |
AT (1) | ATE257214T1 (en) |
AU (1) | AU712137B2 (en) |
DE (1) | DE69727056D1 (en) |
SE (1) | SE506855C2 (en) |
WO (1) | WO1997049891A1 (en) |
ZA (1) | ZA975507B (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE922221C (en) * | 1952-09-09 | 1955-01-10 | Baker Oil Tools Inc | Pipe shoe for the installation of pipe runs in deep boreholes filled with liquid |
GB8518218D0 (en) * | 1985-07-19 | 1985-08-29 | Drilex Ltd | Drop ball sub-assembly |
US5174392A (en) * | 1991-11-21 | 1992-12-29 | Reinhardt Paul A | Mechanically actuated fluid control device for downhole fluid motor |
SE503367C2 (en) * | 1993-04-27 | 1996-06-03 | Sandvik Ab | Drill pipe element for top hammer drilling |
-
1996
- 1996-06-24 SE SE9602472A patent/SE506855C2/en not_active IP Right Cessation
-
1997
- 1997-06-18 AU AU32821/97A patent/AU712137B2/en not_active Ceased
- 1997-06-18 AT AT97928611T patent/ATE257214T1/en not_active IP Right Cessation
- 1997-06-18 WO PCT/SE1997/001085 patent/WO1997049891A1/en active IP Right Grant
- 1997-06-18 DE DE69727056T patent/DE69727056D1/en not_active Expired - Lifetime
- 1997-06-18 EP EP97928611A patent/EP0907820B1/en not_active Expired - Lifetime
- 1997-06-20 ZA ZA9705507A patent/ZA975507B/en unknown
Also Published As
Publication number | Publication date |
---|---|
AU3282197A (en) | 1998-01-14 |
AU712137B2 (en) | 1999-10-28 |
ATE257214T1 (en) | 2004-01-15 |
SE9602472D0 (en) | 1996-06-24 |
DE69727056D1 (en) | 2004-02-05 |
EP0907820A1 (en) | 1999-04-14 |
WO1997049891A1 (en) | 1997-12-31 |
SE9602472L (en) | 1997-12-25 |
EP0907820B1 (en) | 2004-01-02 |
SE506855C2 (en) | 1998-02-16 |
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