CN105275422A - Thermal recovery casing head - Google Patents
Thermal recovery casing head Download PDFInfo
- Publication number
- CN105275422A CN105275422A CN201410233503.3A CN201410233503A CN105275422A CN 105275422 A CN105275422 A CN 105275422A CN 201410233503 A CN201410233503 A CN 201410233503A CN 105275422 A CN105275422 A CN 105275422A
- Authority
- CN
- China
- Prior art keywords
- casing
- guide rail
- casing head
- hanger
- sleeve pipe
- 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.)
- Pending
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- Earth Drilling (AREA)
Abstract
The invention provides a casing head, comprising a casing head housing, a casing hanger, a hanger sealing set, a casing gate, a casing telescopic guide rail, and a jackscrew assembly. A casing head hanger is sealed in the casing head housing. A casing annular space is sealed through the hanger sealing set. The upper part is compressed through the jackscrew assembly, preventing pushing the casing out of the housing because of excessive pressure.
Description
Technical field
In oil drilling oil recovery process, casing head is a kind of parts of splicing sleeve and various wellhead assembly.In order to the gravity of supporting technology sleeve pipe and production string, seal the annular space between each layer pipe, preventer is installed.The top wellhead assemblies such as tubing head and production tree provide transition to be connected, and by two side mouths on casing head body, can carry out benefits squeeze method, and monitoring well is heavy and note the work operations such as equilibrium liquid.
Background technology
In thickened oil recovery process, main technique has steam viscosity reduction, electrical heating, mix chemical agent etc., well depth adopts steam injection at the heavy oil wells great majority of about 800m, vexed well, blowing, the oil extraction technique that machine is taken out, different according to the technique of drilling completion, anti-highly also difference to some extent on well cementation mud, generally, on mud, anti-distance ground level is 6-10 rice, existing production string carries out completion by welding doughnut-shaped steel plate, install simple, but need at the scene pit shaft to weld, bring very large potential safety hazard, effectively preventer can not be installed when drilling well two is simultaneously opened, two occur that emergency episode not easily processes when opening, add the danger of drilling well.
By producing the problem of upper sudden and violent leakage above, in conjunction with on-the-spot, in line with principle that is simple to operate, that improve use safety, we devise this thermal extraction casing head.
Summary of the invention
This invention thermal extraction casing head comprises casing head housing 1, casing hanger 4, hanger seal group 3, casing pressure outlet plug 2, telescopic extension guide rail 6, jackscrew assembly 5 form, casing head hanger sets in casing head enclosure interior, Sealed casing pipe annular space space is come by hanger seal group, top is compressed by jackscrew assembly, avoids crossing senior general's sleeve pipe due to pressure and ejects housing.
Production string is connected on telescopic extension guide rail, and guide rail forms expansion rails by eight guide rail jackscrews, when steam injection, can free-extension, and ensure the thermal compensation of sleeve pipe, after avoiding sleeve pipe expanded by heating, stress can not discharge and cause casing deformation.
Casing head housing be provided with medium clamp-on, counter go out passage, and supporting pipe pressure outlet plug, simultaneously can carry out by this passage the vapours that formed in relief sleeve, reduce cover tube load.
Hanger seal group adopts shape metallic leak-proof structure, is furnished with nonmetal graphite sealing simultaneously, avoids sealing at high temperature to lose efficacy.
Accompanying drawing explanation
Accompanying drawing is the overall structure of thermal extraction casing head, comprises casing head housing 1, casing hanger 4, hanger seal group 3, casing pressure outlet plug 2, telescopic extension guide rail 6, jackscrew assembly 5.
Detailed description of the invention
In drilling process after complete under surface pipe, casing head housing is connected with surface pipe, then preventer is installed, prepare two and open, machining after the forging of casing head housing.
Two end into after, under enter production string and carry out oil jacket completion practice, last root sleeve pipe is connected with casing hanger, in company with hanger black box, casing hanger is set in casing head housing simultaneously, screw jackscrew, set sealing pressure testing, carry out well cementing operation after qualified, install.
Casing head housing is and other metal parts adopt forged material, and by machining, modifier treatment improves its mechanical performance, and jackscrew black box is that expanded graphite is compressing.
Claims (3)
1. production string is connected on telescopic extension guide rail, and guide rail forms expansion rails by eight guide rail jackscrews, when steam injection, can free-extension, and ensure the thermal compensation of sleeve pipe, after avoiding sleeve pipe expanded by heating, stress can not discharge and cause casing deformation.
2. casing head housing be provided with medium clamp-on, counter go out passage, and supporting pipe pressure outlet plug, simultaneously can carry out by this passage the vapours that formed in relief sleeve, reduce cover tube load.
3. hanger seal group adopts shape metallic leak-proof structure, is furnished with nonmetal graphite sealing simultaneously, avoids sealing at high temperature to lose efficacy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233503.3A CN105275422A (en) | 2014-05-29 | 2014-05-29 | Thermal recovery casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233503.3A CN105275422A (en) | 2014-05-29 | 2014-05-29 | Thermal recovery casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105275422A true CN105275422A (en) | 2016-01-27 |
Family
ID=55145154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410233503.3A Pending CN105275422A (en) | 2014-05-29 | 2014-05-29 | Thermal recovery casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105275422A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999585A (en) * | 2018-06-21 | 2018-12-14 | 中国石油天然气股份有限公司 | Thermal extraction casing head, hot exploitation system and completion method |
| CN111577193A (en) * | 2019-02-18 | 2020-08-25 | 中海油能源发展股份有限公司 | Installation method of split casing head locking device |
| CN114000850A (en) * | 2021-12-31 | 2022-02-01 | 纬达石油装备有限公司 | Straight-through type thermal recovery casing head and using method thereof |
-
2014
- 2014-05-29 CN CN201410233503.3A patent/CN105275422A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999585A (en) * | 2018-06-21 | 2018-12-14 | 中国石油天然气股份有限公司 | Thermal extraction casing head, hot exploitation system and completion method |
| CN111577193A (en) * | 2019-02-18 | 2020-08-25 | 中海油能源发展股份有限公司 | Installation method of split casing head locking device |
| CN114000850A (en) * | 2021-12-31 | 2022-02-01 | 纬达石油装备有限公司 | Straight-through type thermal recovery casing head and using method thereof |
| CN114000850B (en) * | 2021-12-31 | 2022-03-04 | 纬达石油装备有限公司 | Straight-through type thermal recovery casing head and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |