CN202047790U - Steam injection valve - Google Patents
Steam injection valve Download PDFInfo
- Publication number
- CN202047790U CN202047790U CN2011201800701U CN201120180070U CN202047790U CN 202047790 U CN202047790 U CN 202047790U CN 2011201800701 U CN2011201800701 U CN 2011201800701U CN 201120180070 U CN201120180070 U CN 201120180070U CN 202047790 U CN202047790 U CN 202047790U
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- CN
- China
- Prior art keywords
- injection valve
- steam injection
- central tube
- steam
- extension tube
- Prior art date
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Abstract
The utility model provides a steam injection valve, which comprises a central pipe and an outer connecting pipe, wherein the outer connecting pipe is sleeved at the outer side of the central pipe, an annular flow passage is formed between the central pipe and the outer connecting pipe, one end of the outer connecting pipe is fixedly connected with the central pipe, guiding grooves are formed on the inner circumferential wall on the other end of the outer connecting pipe at intervals, each guiding groove is communicated with the annular flow passage, the side wall of the central pipe is provided with injection holes corresponding to the annular flow passage, and the annular flow passage is communicated with the interior of the central pipe through the injection holes. Due to the adoption of the steam injection valve, the wall of a horizontal oil well can be protected while the steam is injected, and the weakness of the prior art can be overcome.
Description
Technical field
The utility model relates to a kind of steam injection valve, especially a kind of steam injection valve that is applicable to horizontal well.
Background technology
At present, utilize horizontal well to improve heavy crude reservoir oil well productivity and recovery ratio, become a kind of cost-effective means and the approach of taping the latent power in oil field, and the horizontal well horizontal segment is subjected to the influence of reservoir heterogeneity and peripheral recovery percent of reserves on stream, vapour is scurried particularly thorny between well, oil reservoir is difficult to employ, a large amount of horizontal well well temperature monitor data analysis and research exploitations are found, all there is the uneven situation of employing in 80% horizontal well horizontal segment, for the better effect of performance horizontal well, evenly employ horizontal segment, develop the horizontal well even steam injection technology.
Steam injection valve is the important component part of horizontal well even steam injection technology, horizontal well steam injection valve in the past adopts an oil pipe to beat several holes replacement steam injection valves, because injecting the steam in shaft bottom can not adjust according to the rerum natura of oil reservoir, and the steam of high temperature can reduce the application life of oil well to the injury of damaging property of the horizontal segment completion borehole wall.
Because the defective that above-mentioned known technology exists, the design people develops steam injection valve of the present utility model according to the production design experiences of being engaged in this area and association area for many years.
The utility model content
The purpose of this utility model is to be to provide a kind of steam injection valve, and it can protect horizontal well when annotating vapour oil-well wall has overcome the defective of prior art.
For this reason, the utility model proposes a kind of steam injection valve, it includes a central tube and an extension tube attached, described extension tube attached is set in the outside of described central tube, form an annular channel between the two, one end of described extension tube attached and described central tube Joint, the internal perisporium of its other end is formed with guiding gutter at interval, described guiding gutter and described annular channel are conducted, offer the injection allocation hole corresponding to described annular channel on the sidewall of described central tube, described annular channel is connected with the inside of described central tube by described injection allocation hole.
Aforesaid steam injection valve, wherein, the outer wall at described central tube middle part is along circumferentially being formed with first recess, and described extension tube attached is provided with second recess with the corresponding inwall of described first recess, and described first recess, second recess constitute described annular channel.
Aforesaid steam injection valve, wherein, an end of described extension tube attached is connected on the described central tube by pin.
Aforesaid steam injection valve, wherein, the threaded one end of described extension tube attached is connected on the described central tube.
Aforesaid steam injection valve, wherein, the internal perisporium of the other end of described extension tube attached is along circumferentially being evenly equipped with three described guiding gutters.
Aforesaid steam injection valve, wherein, the sidewall of described central tube is along circumferentially being provided with a plurality of described injection allocations hole.
Aforesaid steam injection valve, wherein, an end of described central tube is bolted with a tubing coupling, and its other end is provided with external screw thread.
The steam injection valve that the utility model proposes; by sheathed extension tube attached outside central tube; and between is provided with annular channel; make steam by in the central tube through the injection allocation hole; annular channel and guiding gutter enter in the horizontal well; compared with prior art; changed the flow direction that injects stratum steam; on the one hand; make high temperature; high steam stream can directly not cause rigid injury to oil well completion borehole wall middle sleeve or screen casing; can play a protective role to oil well, on the other hand, can also avoid steam to advance by leaps and bounds and form the Shuitu phenomenon towards a direction; further enlarge the active area of steam, reached the purpose that makes steam evenly inject the stratum.
The steam injection valve that the utility model proposes designs ingeniously, simple in structure, and dependable performance can satisfy the requirement of horizontal well even steam injection technology, can realize that steam evenly injects the stratum, reaches the purpose of evenly employing oil reservoir, finally improves the producing well recovery ratio.In addition, this steam injection valve volume is little, in light weight, easy construction, and dependable performance in shaft bottom work can satisfy down to such an extent that go, propose the requirement that draws.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the sectional view along A-A line among Fig. 1.
The critical element label declaration:
1 steam injection valve, 11 central tubes
111 injection allocation holes, 112 first recesses
12 extension tube attached, 121 guiding gutters
122 second recesses, 13 annular channels
15 tubing couplings of 14 pins
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model:
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the sectional view along A-A line among Fig. 1.
Referring to Fig. 1, a kind of steam injection valve 1 that the utility model proposes, include a central tube 11 and an extension tube attached 12, wherein, described extension tube attached 12 is set in the outside of described central tube 11, form an annular channel 13 between the two, one end of described extension tube attached 12 and described central tube 11 Joints, the internal perisporium of its other end is formed with guiding gutter 121 at interval, described guiding gutter 121 is conducted with described annular channel 13, offer injection allocation hole 111 corresponding to described annular channel 13 on the sidewall of described central tube 11, described annular channel 13 is connected with the inside of described central tube 11 by described injection allocation hole 111.
A possible implementation is, the outer wall at described central tube 11 middle parts is along circumferentially being formed with first recess 112, described extension tube attached 12 is provided with second recess 122 with described first recess, 112 corresponding inwalls, and described first recess 112, second recess 122 constitute described annular channel 13.
Wherein, an end of described extension tube attached 12 is connected on the described central tube 11 by pin 14, and position is between the two interfixed, and can relative displacement not take place because of the external force effect.Certainly, the connected mode of central tube and extension tube attached is not limited thereto, such as, in other embodiment, an end of described extension tube attached also can be by being threadedly connected on the described central tube.
Further, as shown in Figure 2, the internal perisporium of the other end of preferred described extension tube attached 12 is along circumferentially being evenly equipped with three described guiding gutters 121, with to the even injection allocation steam of the oil well perisporium of horizontal well.
In addition, the sidewall of described central tube 11 is along circumferentially being provided with a plurality of described injection allocations hole 111, and its concrete quantity is decided according to actual conditions, does not do qualification at this.It is to be noted, the big I in 111 apertures, injection allocation hole is passed through the analog computation of formation physical property is decided by computer software, promptly annotate vapour engineering design software and calculate, make the steam that injects in the horizontal well horizontal segment can more reasonably injection allocation according to the hole deviation digital simulation of given notes vapour time, well head pressure, well head mass dryness fraction, steam injection rate and horizontal well by steam flooding.
As shown in the figure, an end of described central tube 11 is bolted with a tubing coupling 15, and its other end is provided with external screw thread so that play the sealing and with the supporting connection of tubing string in the oil well.Wherein, the external screw thread specification of this central tube is preferably 31/2 " tubing thread.
Principle of the present utility model is, this steam injection valve is connected on the tubing string, and is lowered to tubing string this steam injection valve is lowered in the horizontal well; Steam in jection in tubing string, steam enters annular channel 13 by central tube 11 inside through injection allocation hole 111, and passes through the borehole wall place of the guiding gutter 121 of extension tube attached 12 to oil well subsequently, and the well section of horizontal well is employed evenly.Wherein, by extension tube attached is set, on the one hand, changed the flow direction that injects stratum steam, make high temperature, high steam stream can directly not cause rigid injury, on the other hand, avoided steam to advance by leaps and bounds and formed the Shuitu phenomenon towards a direction to oil well completion borehole wall middle sleeve or screen casing, can further enlarge the active area of steam, reach the purpose that makes steam evenly inject the stratum.
As can be known above-mentioned, steam injection valve design of the present utility model is ingenious, simple in structure, and dependable performance can satisfy the requirement of horizontal well even steam injection technology, can realize that steam evenly injects the stratum, reaches the purpose of evenly employing oil reservoir, finally improves the producing well recovery ratio; Its volume is little, in light weight, easy construction, and dependable performance in shaft bottom work can satisfy down to such an extent that go, propose the requirement that draws.
In addition, for the utility model, in actual use, also can connect a plurality of described steam injection valves 1 at interval, act on simultaneously, can realize the oil-well wall multiple spot is annotated the function of vapour with diverse location under the condition of mobile tubing string not to horizontal segment by tubing string.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (7)
1. steam injection valve, it is characterized in that, described steam injection valve includes a central tube and an extension tube attached, described extension tube attached is set in the outside of described central tube, form an annular channel between the two, one end of described extension tube attached and described central tube Joint, the internal perisporium of its other end is formed with guiding gutter at interval, described guiding gutter and described annular channel are conducted, offer the injection allocation hole corresponding to described annular channel on the sidewall of described central tube, described annular channel is connected with the inside of described central tube by described injection allocation hole.
2. steam injection valve as claimed in claim 1, it is characterized in that, the outer wall at described central tube middle part is along circumferentially being formed with first recess, and described extension tube attached is provided with second recess with the corresponding inwall of described first recess, and described first recess, second recess constitute described annular channel.
3. steam injection valve as claimed in claim 1 or 2 is characterized in that, an end of described extension tube attached is connected on the described central tube by pin.
4. steam injection valve as claimed in claim 1 or 2 is characterized in that the threaded one end of described extension tube attached is connected on the described central tube.
5. steam injection valve as claimed in claim 2 is characterized in that, the internal perisporium of the other end of described extension tube attached is along circumferentially being evenly equipped with three described guiding gutters.
6. steam injection valve as claimed in claim 1 is characterized in that, the sidewall of described central tube is along circumferentially being provided with a plurality of described injection allocations hole.
7. steam injection valve as claimed in claim 6 is characterized in that, an end of described central tube is bolted with a tubing coupling, and its other end is provided with external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201800701U CN202047790U (en) | 2011-05-31 | 2011-05-31 | Steam injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201800701U CN202047790U (en) | 2011-05-31 | 2011-05-31 | Steam injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202047790U true CN202047790U (en) | 2011-11-23 |
Family
ID=44988101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201800701U Expired - Lifetime CN202047790U (en) | 2011-05-31 | 2011-05-31 | Steam injection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202047790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536183A (en) * | 2012-01-31 | 2012-07-04 | 中国石油化工股份有限公司 | Underground gas injection pipe column |
-
2011
- 2011-05-31 CN CN2011201800701U patent/CN202047790U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536183A (en) * | 2012-01-31 | 2012-07-04 | 中国石油化工股份有限公司 | Underground gas injection pipe column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111123 |
|
| CX01 | Expiry of patent term |