CN2703870Y - Blowout-proof sieve tube - Google Patents
Blowout-proof sieve tube Download PDFInfo
- Publication number
- CN2703870Y CN2703870Y CN 200420067158 CN200420067158U CN2703870Y CN 2703870 Y CN2703870 Y CN 2703870Y CN 200420067158 CN200420067158 CN 200420067158 CN 200420067158 U CN200420067158 U CN 200420067158U CN 2703870 Y CN2703870 Y CN 2703870Y
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- CN
- China
- Prior art keywords
- central tube
- blowout prevention
- blowout
- seating nipple
- utility
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- 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 relates to a blowout-proof sieve tube, principally aiming at solving the problem of the inconvenience of the apparatus installation of the existing down-hole blowout prevention and liquid intake, the limitation of the application scope, and the great difficulty of the construction. The utility model is characterized in that the upper part of a central tube (8) with a key slot is fastened in a working barrel (3) and is fixed by a releasing pin (5). The sidewalls of the working barrel (3) and the central tube (8) are respectively provided with a corresponding hole (9, 10); the corresponding part of the lower part of the working barrel (3) and the key slot of the central tube (8) is fixed with a diving key (6); the upper part of the working barrel (3) is connected and sealed with an upper contact (1). The blowout-proof sieve tube can make the oil well realize liquid intake under well and the blowout prevention of the quadratic operation. The utility model has the characteristics of convenient installation, favorable blowout prevention, simple technique, and repeatable utilization and simultaneously the utility model is applicable to pumping wells, screw pump wells, and deviation grinding wells.
Description
Technical field:
The utility model relates to the down-hole blowout prevention of a kind of oil well, feed liquor instrument, especially blowout prevention screen casing.
Background technology:
During the oil well job execution, make owing to borehole pressure is high in the oil pipe outside liquid ejection or the discharger, contaminated environment so not only, and influence the job execution progress, need use not kill-job technology for this reason.Down-hole blowout prevention, the feed liquor instrument of Oilfield using have shape for hat valve, blowout-prevention connecting-tripping device, Y445 (3)-114 not kill string, big pump pump-packing device etc. at present, but all correspondingly have a following problem: the shape for hat valve requires relatively stricter to the pipe arrangement post, rod collar can not pass through valve during the oil pumper motion, inapplicable eccentric wear well, the scope of application is limited; Blowout-prevention connecting-tripping device docks difficulty sometimes, and inconvenience is installed; Y445 (3)-114 not kill string salvages difficulty, particularly milling packer complex procedures, and difficulty of construction is big; Big pump pump-packing device does not close sometimes, and adopts switch in the pump, and switch motion is not obvious on ground, only is applicable to rod-pumped well.
The utility model content:
In order to overcome the blowout prevention of existing down-hole, feed liquor instrument the deficiency inconvenient, that the scope of application is limited and difficulty of construction is big is installed, the utility model provides a kind of blowout prevention screen casing, this blowout prevention screen casing can reach and make oil well realize that down-hole liquid flows to the effect of liquid, secondary operation blowout prevention, have easy for installation, blowout prevention is effective, technology is simple and the characteristics that can reuse, and is applicable to rod-pumped well, screw bolt well and eccentric wear well simultaneously.
The technical solution of the utility model is: this blowout prevention screen casing comprises central tube, the central tube top that has keyway is stuck in the seating nipple and by release pin mutually to be fixed, seating nipple and the sidewall of central tube have can be corresponding the hole, seating nipple lower end and central tube keyway corresponding position are fixed with feather key, and the seating nipple upper end is connected with top connection and sealing with it.
The above-mentioned central tube and the middle part of seating nipple along the circumferential direction evenly have 8 holes respectively; The central tube upper end is threaded and blocks mutually with seating nipple behind the cap fully; The connection of thread of seating nipple and top connection is equipped with packing; Feather key is locked by pin for suppressing metal.
The utlity model has following beneficial effect: owing to take such scheme, the blowout prevention screen casing is owing to adopt the structure of slideway and eyelet, make the blowout prevention screen casing promptly have the function of feed liquor to reach the purpose of blowout prevention again, compare with former not kill-job technology and to have that construction is simple, blowout prevention is effective, can reuse, be applicable to rod-pumped well, screw bolt well simultaneously.
Description of drawings:
Accompanying drawing 1 is a structure half sectional view of the present utility model.
1-top connection among Fig. 1, the 2-packing, the 3-seating nipple, 4-is equipped with cap, 5-release pin, 6-feather key, 7-pin for suppressing metal, 8-central tube, 9,10-hole.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in fig. 1, this blowout prevention screen casing comprises central tube 8, the middle and lower part of central tube 8 is fixed in the seating nipple 3 by 4 release pins 5, release pin 5 plays the instrument of preventing when going into the well seat envelope feed liquor midway, the middle part of seating nipple 3 evenly has the effect that feed liquor is played in 8 holes 9, the middle part of central tube 8 evenly has the effect that feed liquor is played in 8 holes 10, central tube 8 upper ends are threaded and block mutually with seating nipple 3 behind the cap 4 fully, be equipped with cap 4 and can prevent that central tube 8 from coming off, 8 of seating nipple 3 lower ends and central tubes are equipped with the feather key 6 by 7 lockings of 3 pins for suppressing metal, feather key 6 guarantees that it moves on slideway under pin for suppressing metal 7 lockings, seating nipple 3 upper end screw threads are connected with top connection 1 and the junction is equipped with packing 2, and packing 2 guarantees sealing.
This blowout prevention screen casing lower end is connected with supporting slip, and its upper end is connected the lower end of pump.Under the oil well operation during pump, seating nipple 3 is fixed on the top of slideway under the locking of release pin 5,8 holes 9 of seating nipple 3 and 8 holes 10 of central tube 8 contact with the sealing surface of central tube 8 and the sealing surface of seating nipple 3 respectively, have sealed the passage that liquid in the well enters oil pipe, realize blowout prevention.Supporting slip seat envelope after the completion, cut off release pin 5, seating nipple moves down, when seating nipple 3 moves down into the slideway lower end, 8 holes 9 of seating nipple 3 communicate with 8 holes 10 of central tube 8, the interior liquid of well this moment flows into central tube 8 and enters in the pump outside the hole that is communicated with, this moment, oil well can pumping production.Upper lifting pipe post when the oil well secondary operation, top connection 1 drive seating nipple 3 and move up along slideway, and central tube 8 is motionless, when moving on to the slideway upper end on the feather key, stagger with 8 holes 9 of central tube 8 in 8 holes 10 of central tube 8, this moment, feed pathway was closed, and realized snubbing serving.
Claims (5)
1, a kind of blowout prevention screen casing, comprise central tube (8), it is characterized in that: central tube (8) top that has keyway is stuck in the seating nipple (3) and by release pin (5) mutually to be fixed, seating nipple (3) and the sidewall of central tube (8) have can be corresponding hole (9,10), seating nipple (3) lower end and central tube (8) keyway corresponding position are fixed with feather key (6), and seating nipple (3) upper end is connected with top connection (1) and sealing with it.
2, blowout prevention screen casing according to claim 1 is characterized in that: the middle part of central tube (8) and seating nipple (3) along the circumferential direction evenly has 8 holes (9,10) respectively.
3, blowout prevention screen casing according to claim 1 is characterized in that: central tube (8) upper end is threaded and blocks mutually with seating nipple (3) behind the cap (4) fully.
4, blowout prevention screen casing according to claim 1 is characterized in that: seating nipple (3) is equipped with packing (2) with the connection of thread of top connection (1)
5, according to claim 1,2,3 or 4 described blowout prevention screen casings, it is characterized in that: feather key (6) is locked by pin for suppressing metal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420067158 CN2703870Y (en) | 2004-06-16 | 2004-06-16 | Blowout-proof sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420067158 CN2703870Y (en) | 2004-06-16 | 2004-06-16 | Blowout-proof sieve tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2703870Y true CN2703870Y (en) | 2005-06-08 |
Family
ID=34777805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420067158 Expired - Fee Related CN2703870Y (en) | 2004-06-16 | 2004-06-16 | Blowout-proof sieve tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2703870Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134121A (en) * | 2015-08-21 | 2015-12-09 | 梁伟成 | Screw pump blowout prevention supporting slips anchoring tool |
| CN107355192A (en) * | 2016-05-10 | 2017-11-17 | 辽宁新华仪器有限公司 | A kind of screw pump anti-blowout anchoring tool |
-
2004
- 2004-06-16 CN CN 200420067158 patent/CN2703870Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134121A (en) * | 2015-08-21 | 2015-12-09 | 梁伟成 | Screw pump blowout prevention supporting slips anchoring tool |
| CN107355192A (en) * | 2016-05-10 | 2017-11-17 | 辽宁新华仪器有限公司 | A kind of screw pump anti-blowout anchoring tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050608 Termination date: 20130616 |