CN204511369U - A kind of float collar of double seal system - Google Patents
A kind of float collar of double seal system Download PDFInfo
- Publication number
- CN204511369U CN204511369U CN201520138504.XU CN201520138504U CN204511369U CN 204511369 U CN204511369 U CN 204511369U CN 201520138504 U CN201520138504 U CN 201520138504U CN 204511369 U CN204511369 U CN 204511369U
- Authority
- CN
- China
- Prior art keywords
- righting
- float collar
- orifice plate
- seal valve
- seal
- 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
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Abstract
The utility model discloses a kind of float collar of double seal system, comprise float collar body, be positioned at the righting orifice plate of float collar body cavity, seal valve in the top of righting orifice plate is provided with, the bottom of righting orifice plate is provided with lower interior seal valve, in upper, seal valve is connected with float collar body with thread forms with lower interior seal valve, and realize the sealing between float collar body by O type circle, upper ball sealer is arranged between interior seal valve and righting orifice plate, lower seal ball is arranged on below lower interior seal valve, upper ball sealer and lower seal ball are connected to the two ends of the connecting rod through righting orifice plate, connecting rod between upper ball sealer and righting orifice plate overlaps the spring having control connection bar to move up and down, righting orifice surface is provided with multiple through holes that mud is circulated.The erosion attack that the utility model causes the single ball sealer of float collar effectively to avoid mud circulation, thus significantly improve the application life of float collar float plug.
Description
Technical field
The utility model relates to float collar, the float collar of the double seal system in especially a kind of cementing operation that can be used for any well type, the down-hole accident that can effectively prevent from mud from returning causing.
Background technology
Float collar is cementing tool the most frequently used in cementing operation, and currently used form mainly comprises Spring driving, hyoplastron and ball float three kinds of forms.Its effect is used to the lowered position controlling plug, when preventing from cementing the well, cement paste flows backwards, and the design that the down-hole situation become increasingly complex determines float collar will constantly update, and it is poor that existing most of float collar design exists sealing performance, be chronically exposed in mud circulation passage, abrasion resistance is poor.The sealing mechanism of float collar, once be destroyed, cannot be formed and effectively seal, and cause the serious well cementation accident of " sausage-filling ".And once back-pressure valve is malfunctioning, cement paste produces flowing in bonding process, directly will affect cementing quality, even cause cementing operation failure, heavy then whole mouth well will be caused to scrap.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of and adopts double sealing structure, reduce the fatigue damage that single ball sealer is subject to, thus significantly improve the float collar of the double seal system in the application life of float collar float plug.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of float collar of double seal system, comprise float collar body, be positioned at the righting orifice plate of float collar body cavity, seal valve in the top of righting orifice plate is provided with, the bottom of righting orifice plate is provided with lower interior seal valve, in upper, seal valve is connected with float collar body with thread forms with lower interior seal valve, and realize the sealing between float collar body by O type circle, upper ball sealer is arranged between interior seal valve and righting orifice plate, lower seal ball is arranged on below lower interior seal valve, upper ball sealer and lower seal ball are connected to the two ends of the connecting rod through righting orifice plate, connecting rod between upper ball sealer and righting orifice plate overlaps the spring having control connection bar to move up and down, righting orifice surface is provided with multiple through holes that mud is circulated.
Described righting orifice plate and float collar body, for being threaded, are matched in clearance with connecting rod, play centralizing function.
The even cloth of described righting orifice surface 6 through holes.
Described upper ball sealer and lower seal ball by with being threaded togather of connecting rod two ends.
The beneficial effects of the utility model are: effectively can avoid the erosion attack that mud circulation causes the single ball sealer of float collar, thus significantly improve the application life of float collar float plug.
Accompanying drawing explanation
Fig. 1 is the float collar schematic diagram of double seal system of the present utility model;
In figure, 1. float collar body; 2. seal valve in going up; 3. go up ball sealer; 4. spring; 5. righting orifice plate; 6. connecting rod; 7. seal valve time; 8. lower seal ball.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1, the float collar of double seal system of the present utility model, comprise float collar body 1, be positioned at the righting orifice plate 5 of float collar body 1 cavity, seal valve 2 in the top of righting orifice plate 5 is provided with, the bottom of righting orifice plate 5 is provided with lower interior seal valve 7, in upper, seal valve 2 is connected with float collar body 1 with thread forms with lower interior seal valve 7, and realize the sealing between float collar body 1 by O type circle, upper ball sealer 3 is arranged between interior seal valve 2 and righting orifice plate 5, lower seal ball 8 is arranged on below lower interior seal valve 7, upper ball sealer 3 and lower seal ball 8 are connected to the two ends of the connecting rod 6 through righting orifice plate 5, connecting rod 6 between upper ball sealer 3 and righting orifice plate 5 overlaps the spring 4 having control connection bar 6 to move up and down, righting orifice plate 5 surface is provided with multiple through holes 9 that mud is circulated.
Described righting orifice plate 5 and float collar body 1, for being threaded, are matched in clearance with connecting rod 6, play centralizing function.
The surperficial even cloth of described righting orifice plate 56 through holes 9.
Described upper ball sealer 3 and lower seal ball 8 by with being threaded togather of connecting rod 6 two ends.
The utility model upper-lower seal ball, by being threaded togather with connecting rod, realizes synchronously opening and closing radial circulation passage under the effect of spring and mud thrust.Axial and radial sealing mechanism forms double sealing insurance, thus realizes sealing efficiently.
The main failure forms of existing float collar is because single sealing glueballs is in mud circulation passage, because circulation is easy to cause ball sealer surface by erosion for a long time.Generation local damage caves in, and causes seal failure.The utility model changes existing float collar Problems existing from structure design, to improve float collar sealing effectiveness, significantly improves the application life of float collar.
In sum, content of the present utility model is not limited in the above-described embodiment, knowledgeable people in same area can propose other embodiment easily within technological guidance's thought of the present utility model, but this embodiment is all included within scope of the present utility model.
Claims (4)
1. the float collar of a double seal system, comprise float collar body (1), be positioned at the righting orifice plate (5) of float collar body (1) cavity, it is characterized in that, the top of righting orifice plate (5) is provided with upper interior seal valve (2), the bottom of righting orifice plate (5) is provided with lower interior seal valve (7), in upper, seal valve (2) is connected with float collar body (1) with thread forms with lower interior seal valve (7), and realize the sealing between float collar body (1) by O type circle, upper ball sealer (3) is arranged between interior seal valve (2) and righting orifice plate (5), lower seal ball (8) is arranged on lower interior seal valve (7) below, upper ball sealer (3) and lower seal ball (8) are connected to the two ends of the connecting rod (6) through righting orifice plate (5), the spring (4) that the upper cover of connecting rod (6) between upper ball sealer (3) and righting orifice plate (5) has control connection bar (6) to move up and down, righting orifice plate (5) surface is provided with multiple through holes (9) that mud is circulated.
2. the float collar of double seal system according to claim 1, is characterized in that, described righting orifice plate (5) and float collar body (1), for being threaded, are matched in clearance with connecting rod (6), plays centralizing function.
3. the float collar of double seal system according to claim 1, is characterized in that, the surperficial even cloth of described righting orifice plate (5) 6 through holes (9).
4. the float collar of double seal system according to claim 1, is characterized in that, described upper ball sealer (3) and lower seal ball (8) by with being threaded togather of connecting rod (6) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138504.XU CN204511369U (en) | 2015-03-11 | 2015-03-11 | A kind of float collar of double seal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520138504.XU CN204511369U (en) | 2015-03-11 | 2015-03-11 | A kind of float collar of double seal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511369U true CN204511369U (en) | 2015-07-29 |
Family
ID=53709362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520138504.XU Expired - Fee Related CN204511369U (en) | 2015-03-11 | 2015-03-11 | A kind of float collar of double seal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204511369U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030668A (en) * | 2022-08-10 | 2022-09-09 | 东营百利源信息技术有限公司 | Float collar float shoe for well cementation construction |
-
2015
- 2015-03-11 CN CN201520138504.XU patent/CN204511369U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030668A (en) * | 2022-08-10 | 2022-09-09 | 东营百利源信息技术有限公司 | Float collar float shoe for well cementation construction |
| CN115030668B (en) * | 2022-08-10 | 2022-11-15 | 盘锦恒奥瑞佳实业有限公司 | Float collar float shoe for well cementation construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20170311 |