CN202431222U - Casing head for tie-back in well repair - Google Patents
Casing head for tie-back in well repair Download PDFInfo
- Publication number
- CN202431222U CN202431222U CN2011204169434U CN201120416943U CN202431222U CN 202431222 U CN202431222 U CN 202431222U CN 2011204169434 U CN2011204169434 U CN 2011204169434U CN 201120416943 U CN201120416943 U CN 201120416943U CN 202431222 U CN202431222 U CN 202431222U
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- CN
- China
- Prior art keywords
- casing
- casing head
- head housing
- production string
- flange
- 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
A casing head for tie-back in well repair relates to a device for well repair in an oil field, solves the problems existing in other technologies, and adopts the structure that the upper end of an intermediate casing is connected to the lower end of a casing head housing; an oil-string casing is positioned in the intermediate casing; a press plate is fixed on the outer wall at the upper end of the oil-string casing through jackscrews; an integrated slip hanger is mounted in a position 10 MM below an oil-string casing collar and directly sits on the inner conical surface of the casing head to be guided and hung by the internal taper of the casing head housing; an injection flange is mounted at the upper part of the casing head housing, and a sealing gasket is arranged between the injection flange and the casing head housing for sealing; meanwhile, the oil-string casing collar is sealed by the injection flange; the injection flange wraps the oil-string casing collar; and the injection flange and the casing head housing are connected and fixed through flange bolts.
Description
Technical field: the utility model relates to the oil field well workover and uses device, and especially a kind of well workover tieback is used casing head.
Background technology: in normal production operation; Because underground environment is abominable, sleeve pipe possibly produce breakage owing to reasons such as long-term corrosions, and influence is produced; Tend to solve through technology such as sleeve pipe tiebacks this moment; And the control that sleeve pipe tieback technology is transferred the degree of depth to sleeve pipe requires than higher, so the slip-type hitch becomes the only choosing of this type of suspension operation, however conventional slip-type hanger structure relative complex; The annular space space there is certain requirement, is not suitable in the less casing head in annular space space, using.
Summary of the invention: the purpose of the utility model provides a kind of well workover tieback easy for installation simple in structure and uses casing head; It has solved the problem that other technology exists; The purpose of the utility model is to realize like this; It is to be formed by connecting production string box cupling, injection moulding flange, gasket ring, pressing plate, integral type slips hanger, casing head housing, production string, protective casing, jackscrew, and the upper end of protective casing is connected the lower end of casing head housing, and production string is positioned at protective casing; Outer wall is being fixed pressing plate by jackscrew in the upper end of production string; The integral type slips hanger is installed in the 10MM place, below of production string box cupling, and directly seat is hung by the guiding of casing head housing internal taper on the casing head inner conical surface; The injection moulding flange is installed in the top of casing head housing, and there is gasket ring sealing the centre, and the production string box cupling is by the injection moulding flange seal simultaneously, and the injection moulding flange is enclosed within production string box cupling outside, and the injection moulding flange is connected with flange bolt with the casing head housing and fixes.
The beneficial effect of the utility model is; 1. having made full use of limited annular space space is beneficial to circulation well cementation 2. integral type slips hangers 3. integral type slip-types easy for installation simple in structure and hangs reliable and stable easy operating 4. and kept casing coupling; Make after finishing sleeve pipe down, to not be used in and employ torch operation; Especially at the construction field (site) complicated, when naked light can not be seen in the well site, this utility model provided safety assurance.
Description of drawings: Fig. 1 is the structural representation of a kind of well workover tieback with casing head, among the figure 1, production string box cupling 2, injection moulding flange 3, gasket ring 4, pressing plate 5, integral type slips hanger 6, casing head housing 7, production string 8, protective casing 9, jackscrew.
The specific embodiment: embodiment 1, the utility model are to be formed by connecting production string box cupling 1, injection moulding flange 2, gasket ring 3, pressing plate 4, integral type slips hanger 5, casing head housing 6, production string 7, protective casing 8, jackscrew 9; The upper end of protective casing 8 is connected the lower end of casing head housing 6, and production string 7 is positioned at protective casing 8; Outer wall is being fixed pressing plate 4 by jackscrew 9 in the upper end of production string 7.
Embodiment 2, integral type slips hanger 5 are installed in the 10MM place, below of production string box cupling 1, and directly seat is hung by the guiding of casing head housing 6 internal tapers on the casing head inner conical surface.
Embodiment 3, injection moulding flange 2 are installed in the top of casing head housing 6; And there are gasket ring 3 sealings the centre; Production string box cupling 1 is by 2 sealings of injection moulding flange simultaneously, and injection moulding flange 2 is enclosed within production string box cupling 1 outside, and injection moulding flange 2 is connected fixing with casing head housing 6 usefulness flange bolts.
Claims (3)
1. a well workover tieback is used casing head; It is to be formed by connecting production string box cupling (1), injection moulding flange (2), gasket ring (3), pressing plate (4), integral type slips hanger (5), casing head housing (6), production string (7), protective casing (8), jackscrew (9); It is characterized in that: the upper end of protective casing (8) is connected the lower end of casing head housing (6), and production string (7) is positioned at protective casing (8); Upper end outer wall at production string (7) is being fixed pressing plate (4) by jackscrew (9).
2. a kind of well workover tieback according to claim 1 is used casing head; It is characterized in that: integral type slips hanger (5) is installed in the 10MM place, below of production string box cupling (1); And directly seat is on the casing head inner conical surface, by casing head housing (6) internal taper guiding suspension.
3. a kind of well workover tieback according to claim 1 is used casing head; It is characterized in that: injection moulding flange (2) is installed in the top of casing head housing (6); And there is gasket ring (3) sealing the centre; Production string box cupling (1) is by injection moulding flange (2) sealing simultaneously, and injection moulding flange (2) is enclosed within production string box cupling (1) outside, and injection moulding flange (2) is connected fixing with casing head housing (6) with flange bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204169434U CN202431222U (en) | 2011-10-28 | 2011-10-28 | Casing head for tie-back in well repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204169434U CN202431222U (en) | 2011-10-28 | 2011-10-28 | Casing head for tie-back in well repair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431222U true CN202431222U (en) | 2012-09-12 |
Family
ID=46780682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204169434U Expired - Fee Related CN202431222U (en) | 2011-10-28 | 2011-10-28 | Casing head for tie-back in well repair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431222U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670289A (en) * | 2013-12-08 | 2014-03-26 | 无锡蚂蚁微威科技有限公司 | Oil well pipeline |
-
2011
- 2011-10-28 CN CN2011204169434U patent/CN202431222U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670289A (en) * | 2013-12-08 | 2014-03-26 | 无锡蚂蚁微威科技有限公司 | Oil well pipeline |
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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: 20120912 Termination date: 20131028 |