CN203022675U - Thermal recovery well mouth protecting device - Google Patents
Thermal recovery well mouth protecting device Download PDFInfo
- Publication number
- CN203022675U CN203022675U CN 201220713442 CN201220713442U CN203022675U CN 203022675 U CN203022675 U CN 203022675U CN 201220713442 CN201220713442 CN 201220713442 CN 201220713442 U CN201220713442 U CN 201220713442U CN 203022675 U CN203022675 U CN 203022675U
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- CN
- China
- Prior art keywords
- slips
- well mouth
- flange
- slip
- layer casing
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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 - Lifetime
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Abstract
The utility model relates to a thermal recovery well mouth protecting device. The thermal recovery wellhead protecting device comprises a bolt, a nut, a well mouth cap, a well completion flange, an outer seal ring, a backing ring, a slip cover, an upper slip, a lower slip, a slip seat, an inner seal ring, screwed plugs, a bottom flange, an oil-layer casing and an surface-layer casing, wherein the surface-layer casing is sequentially connected with the bottom flange, the well completion flange and the well mouth cap, the slip seat is mounted among the oil-layer casing, an surface-layer casing and the bottom flange, and the lower slip, the upper slip and the slip cover are sequentially mounted and connected between the slip seat and the oil-layer casing. The thermal recovery well mouth protecting device has the characteristics that the arrangement is reasonable, the performance is reliable and safe, and the function is strong; and when the oil-layer casing is clamped by the slips, the casings and the slips can simultaneously ascend and descend during expansion caused by heat and contraction caused by cold before and after the steam is injected, the damaging on the casings can be effectively avoided, meanwhile, the well mouth and Christmas trees can be more effectively compensated and protected, so that unsafe factors such as raising of a well mouth connecting pipe caused during preheating are eliminated, and the thermal recovery well mouth protecting device is widely applied to thermal recovery processes of recovery of petroleum and thickened oil.
Description
Technical field
The utility model relates to thermal production well mouth protection facility, particularly a kind of thermal production well mouth protective device in oil exploitation.
Background technology
Traditional petroleum thermal recovery well head protective device, its structure is: only block production string with slips, rely on the production string dead weight, make slips and sleeve pipe form a kind of firm combination.The thermal production well mouth protection facility of this structure, for effect has been brought into play in the protection of petroleum thermal recovery well head, but it exists following shortcoming or deficiency simultaneously: 1. existing product is just taked: with slips, sleeve pipe is tightly blocked, the while slips is limited can not moving up and down also, sleeve pipe can only rise and can not fall after rise in the production string expanded by heating, in the process of annotating high-temperature steam, the strength of expanding with heat and contract with cold of production string is with production string necking deformation in slips, so that slips or sleeve pipe generation damage in various degree; 2. due to the damage of sleeve pipe, cause recovery well to be difficult to operation, make production, economy suffer huge loss; 3. sleeve pipe can only rise to fall and cause pushing up at last bad well head; 4. the damage slips that expands with heat and contract with cold of sleeve pipe is even cause the slips coupling mechanism force to lose efficacy not.
Summary of the invention
The purpose of this utility model is to provide a kind of improved thermal production well mouth protective device; adopt production string, surface pipe and completion flange, end flange and slips lid, upper slips, lower slips, the combined sleeve type structure of slip spider; slips blocks production string; when expanding with heat and contract with cold, sleeve pipe and slips can rise simultaneously or descend, the shortcoming or the deficiency that effectively overcome or avoid existing in above-mentioned prior art.
Thermal production well mouth protective device described in the utility model comprises bolt, nut, wellhead cap, completion flange, exterior seal ring, gasket ring, slips lid, upper slips, lower slips, slip spider, inner seal ring, plug, end flange, production string, surface pipe.Be connected with wellhead cap with end flange, completion flange in turn on described surface pipe, between described production string and surface pipe, end flange, slip spider be installed, install in turn between this slip spider and production string and be connected with lower slips, upper slips and slips lid.
Wherein, described slip spider is bowl structure, and its external surface matches with end flange inner surface, matches with production string in the inner surface bottom, and this auxiliary section is equipped with inner seal ring.The bottom of described slip spider is provided with inner conical surface, matches with the male cone (strobilus masculinus) of lower slips.Described slips lid, upper slips, lower slips are installed in the bowl structure of slip spider in turn.The bottom of flange of the described end is provided with the inner conical surface step, and the bottom conical surface of slip spider is seated on this inner conical surface step.On the hole of flange bottom, the described end, plug is installed.Described upper slips is provided with male cone (strobilus masculinus), and this male cone (strobilus masculinus) matches with the lower conical surface of slips lid.On described completion flange and end flange, exterior seal ring is installed.
The utility model has following advantage compared with prior art:
1, dependable performance safety is set rationally;
2, function is strong, and when slips blocked production string, when expanding with heat and contract with cold before and after steam injection, sleeve pipe and slips can rise simultaneously or descend, and protective casing and well head and ground connecting line are avoided damage effectively;
3, hermetically-sealed construction is reasonable, and slip spider moves and seal is motionless, and sealing is reliable;
4, adopt dual-grip, strong locking ability.
Description of drawings
Fig. 1 is a kind of example structure schematic diagram of utility model.
The specific embodiment
Consult Fig. 1; a kind of thermal production well mouth protective device comprises bolt 1, nut 2, wellhead cap 3, completion flange 4, exterior seal ring 5, gasket ring 6, slips lid 7, upper slips 8, lower slips 9, slip spider 10, inner seal ring 11, plug 12, end flange 13, production string 14, surface pipe 15.Be connected with end flange 13, completion flange 4 and wellhead cap 3 in turn on surface pipe 15, between production string 14 and surface pipe 15, end flange 13, slip spider 10 is installed, installs in turn between this slip spider 10 and production string 14 and be connected with lower slips 9, upper slips 8 and slips lid 7.
Claims (8)
1. thermal production well mouth protective device; comprise bolt, nut, wellhead cap, completion flange, exterior seal ring, gasket ring, slips lid, upper slips, lower slips, slip spider, inner seal ring, plug, end flange, production string, surface pipe; it is characterized in that being connected with wellhead cap with end flange, completion flange in turn on described surface pipe; between described production string and surface pipe, end flange, slip spider is installed, installs in turn between this slip spider and production string and be connected with lower slips, upper slips and slips lid.
2. thermal production well mouth protective device according to claim 1, is characterized in that described slip spider is bowl structure, and its external surface matches with end flange inner surface, matches with production string in the inner surface bottom, and this auxiliary section is equipped with inner seal ring.
3. thermal production well mouth protective device according to claim 2, is characterized in that the bottom of described slip spider is provided with inner conical surface, matches with the male cone (strobilus masculinus) of lower slips.
4. thermal production well mouth protective device according to claim 1 and 2, is characterized in that described slips lid, upper slips, lower slips are installed in the bowl structure of slip spider in turn.
5. thermal production well mouth protective device according to claim 1, is characterized in that the bottom of flange of the described end is provided with the inner conical surface step, and the bottom conical surface of slip spider is seated on this inner conical surface step.
6. thermal production well mouth protective device according to claim 1 or 5 is characterized in that on the hole of flange bottom, the described end, plug being installed.
7. thermal production well mouth protective device according to claim 1, is characterized in that described upper slips is provided with male cone (strobilus masculinus), and this male cone (strobilus masculinus) matches with the lower conical surface of slips lid.
8. thermal production well mouth protective device according to claim 1, is characterized in that on described completion flange and end flange, exterior seal ring being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713442 CN203022675U (en) | 2012-12-21 | 2012-12-21 | Thermal recovery well mouth protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713442 CN203022675U (en) | 2012-12-21 | 2012-12-21 | Thermal recovery well mouth protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022675U true CN203022675U (en) | 2013-06-26 |
Family
ID=48646666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220713442 Expired - Lifetime CN203022675U (en) | 2012-12-21 | 2012-12-21 | Thermal recovery well mouth protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203022675U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747121A (en) * | 2013-12-25 | 2015-07-01 | 深圳市百勤石油技术有限公司 | Protective jacket for Christmas tree |
| 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 |
-
2012
- 2012-12-21 CN CN 201220713442 patent/CN203022675U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747121A (en) * | 2013-12-25 | 2015-07-01 | 深圳市百勤石油技术有限公司 | Protective jacket for Christmas tree |
| CN104747121B (en) * | 2013-12-25 | 2017-07-07 | 深圳市百勤石油技术有限公司 | Casing head protective sleeve |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 257000 underground operation company, West Fourth Road, Dongying District, Dongying, Shandong Patentee after: Weida Petroleum Equipment Co.,Ltd. Address before: 257000 underground operation company, West Fourth Road, Dongying District, Dongying, Shandong Patentee before: DONGYING XIN HUALIAN PETROLEUM MACHINERY Co. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |
|
| CX01 | Expiry of patent term |