CN202673263U - Pressure control water injection well safety valve - Google Patents
Pressure control water injection well safety valve Download PDFInfo
- Publication number
- CN202673263U CN202673263U CN 201220263968 CN201220263968U CN202673263U CN 202673263 U CN202673263 U CN 202673263U CN 201220263968 CN201220263968 CN 201220263968 CN 201220263968 U CN201220263968 U CN 201220263968U CN 202673263 U CN202673263 U CN 202673263U
- Authority
- CN
- China
- Prior art keywords
- injection well
- water injection
- pressure
- safety valve
- water
- 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 - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims abstract description 105
- 239000007924 injection Substances 0.000 title claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000007789 sealing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Flow Control (AREA)
Abstract
The utility model discloses a pressure control water injection well safety valve. The safety valve comprises water injection tubular columns and water flow regulators. The water flow regulators are sleeved on the water injection tubular columns, and parent tubes of the water flow regulator are provided with water nozzles. Sliding sleeves are sleeved outside the water flow regulators, and openings in a circumference direction are arranged on the sliding sleeves. The top portions of the sliding sleeves are communicated with pressure chambers, the inner walls of the pressure chambers are provided with the water flow regulators, and pressure balance holes are arranged on the outer walls of the pressure chambers. The bottoms of the sliding sleeves are communicated with spring chambers, the inner walls of the spring chambers are provided with the water flow regulators, springs are arranged in the spring chambers, and the vertical direction of the springs is consistent with the radial direction of the water injection tubular columns. Constant pressure control and pressure safe control can be chosen as needed. When a linear water nozzle is processed, the pressure control water injection well safety valve can achieve the constant pressure control and play a role of the pressure safe control. When the linear water nozzle is not processed, the pressure control water injection well safety valve can achieve the function of the pressure safe control and therefore is flexible in function. The pressure control water injection well safety valve can be applied to water injection wells widely.
Description
Technical field
The utility model relates to a kind of pressure control water injection well safety valve, belongs to water injection well injection valve in a kind of petroleum production engineering.
Background technology
At present water injection well usually occurs because of the water quality of injected water not up to standardly in injection process, and therefore the phenomenon that causes sand control screen and near wellbore zone to stop up causes the water injection well injection pressure to increase, and injection rate descends.For separate water injection well, to cause the injection well downhole flow regulator throttling to be lost efficacy after certain one deck injection rate descends, thereby the injection pressure that surpasses expection is acted directly on the stratum, if this pressure surpasses the fracture pressure on this stratum, to cause the stratum to be broken, cause the water injection well geological disaster.
But for water injection well, adopt shaft bottom dynamic pressure monitoring to avoid the scheme of water injection well geological disaster, its cost is higher, be difficult to spread, therefore the needs design is a kind of can be by the injection valve of control of injection pressure, in the situation that does not need the dynamic pressure monitoring, stop water filling according to the injection pressure autoshutdown, thereby guarantee the safety of water injection well.
The utility model content
The purpose of this utility model provides a kind of pressure control water injection well safety valve, and it is simple in structure, safe and reliable, can guarantee effectively that water injection well injects safety.
A kind of pressure control water injection well safety valve provided by the utility model comprises water injection string and injection well downhole flow regulator; Described injection well downhole flow regulator is set on the described water injection string, and the parent tube of described injection well downhole flow regulator is provided with water nozzle; Described injection well downhole flow regulator is arranged with sliding sleeve outward, and described sliding sleeve is provided with circumferential opening; The top of described sliding sleeve is connected with pressure chamber, and the inwall of this pressure chamber is described injection well downhole flow regulator, and the outer wall of described pressure chamber is provided with pressure compensation opening; The bottom of described sliding sleeve is connected with the spring cabin, and the inwall in this spring cabin is described injection well downhole flow regulator, and described spring is provided with spring in the cabin, and the vertical direction of described spring is radially consistent with described water injection string.
Above-mentioned pressure control water injection well safety valve, described injection well downhole flow regulator can be pressure control injection well downhole flow regulator.
Above-mentioned pressure control water injection well safety valve, described water nozzle can be the line style water nozzle, to realize throttling function.
Above-mentioned pressure control water injection well safety valve, described water injection string and injection well downhole flow regulator all are arranged on upper bed-plate and the lower bottom base.
Above-mentioned pressure control water injection well safety valve all can be threaded connection between described water injection string and injection well downhole flow regulator and described upper bed-plate and the lower bottom base.
Above-mentioned pressure control water injection well safety valve can be provided with sealing ring between described sliding sleeve and the described injection well downhole flow regulator, to seal.
Above-mentioned pressure control water injection well safety valve is provided with sealing ring between the outer wall of described sliding sleeve and described pressure chamber, is provided with sealing ring between the outer wall in described sliding sleeve and described spring cabin, to seal.
The utility model is owing to take above technical scheme, and it has the following advantages:
1, the utility model can be installed on outside the conventional waterflooding tubing string, does not affect the use of conventional waterflooding tubing string, can effectively keep the drift diameter area in the conventional waterflooding tubing string.
2, the utility model is simple in structure, and is safe and reliable, can guarantee the injection safety of water injection well.
3, the utility model can be selected two functions of constant voltage control and pressure security control as required, be processed with the line style water nozzle, utility model patent can be realized constant voltage control and play pressure security control function, do not process the line style water nozzle, the utility model patent can realize pressure security control function, flexible function.The utility model can be widely used in the water injection well.
Description of drawings
The pressure that Fig. 1 provides for the utility model is controlled the sectional drawing of water injection well safety valve.
Each mark is as follows among the figure: 1 pressure control injection well downhole flow regulator, 2 water injection strings, 3 line style water nozzles, 4 openings, 5 pressure control sliding sleeve, 6 upper bed-plates, 7 pressure chambers, 8 pressure compensation openings, 9 sealing rings, 10 springs, 11 spring cabins, 12 lower bottom bases.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further, but the utility model is not limited to following examples.
As described in Figure 1, the pressure control water injection well safety valve that provides of the utility model comprises water injection string 2 and pressure control injection well downhole flow regulator 1; Water injection string 2 and 1 all is threaded connection (not shown) and is installed on upper bed-plate 6 and the lower bottom base 12; This pressure control injection well downhole flow regulator 1 is set on the water injection string 2, and the parent tube of this pressure control injection well downhole flow regulator 1 is provided with line style water nozzle 3, can realize throttling function; This pressure control injection well downhole flow regulator 1 outer pressure control sliding sleeve 5 that is arranged with, this pressure control sliding sleeve 5 is provided with circumferential opening 4, realizes throttling and turn-off function to cooperate with line style water nozzle 3; Be provided with sealing ring 9 between this pressure control sliding sleeve 5 and the pressure control injection well downhole flow regulator 1, be used for realizing sealing; The top of pressure control sliding sleeve 5 is connected with pressure chamber 7, and the inwall of this pressure chamber 7 is this pressure control injection well downhole flow regulator 1, and its outer wall is provided with pressure compensation opening 8, links to each other with extraneous liquid; Be provided with sealing ring 9 between pressure control sliding sleeve 5 and pressure chamber 7 outer walls, be used for realizing sealing; The bottom of pressure control sliding sleeve 5 is connected with spring cabin 11, the inwall in this spring cabin 11 is this pressure control injection well downhole flow regulator, be provided with spring 10 in the spring cabin 11, the vertical direction of spring 10 is radially consistent with water injection string 2, and pressure control sliding sleeve 5 is moved up and down under the elastic force effect of spring 10; Be provided with sealing ring 9 between the outer wall in pressure control sliding sleeve 5 and spring cabin 11, be used for realizing sealing.
In the above-mentioned pressure control water injection well safety valve, water injection string and injection well downhole flow regulator can be selected other conventional model and type; Water nozzle on the injection well downhole flow regulator parent tube also may be selected to be other shape; Also can be fixed by alternate manner between water injection string and injection well downhole flow regulator and upper bed-plate and the lower bottom base and cooperate.
When using above-mentioned pressure control water injection well safety valve, injected water flows out by the water nozzle on the water injection string 2, then enter the oil jacket annular space by the line style water nozzle 3 on this safety valve, because the water in the annular space is delivered to pressure chamber 7 with pressure by pressure compensation opening 8, pressure-acting in the pressure chamber 7 is realized pressure balance with the spring 10 in the spring cabin 11 on the top of pressure control sliding sleeve 5; After injection pressure increased, the pressure that acts in the pressure chamber 7 increased thereupon, promoted pressure control sliding sleeve 5 and moved downwards, reduced effective area of passage of line style water nozzle 3, realized throttling, thereby reduced the pressure in the annular space; After injection pressure reduced, the pressure that acts in the pressure chamber 7 decreased, and spring 10 promotes the 5 upwards operations of pressure control sliding sleeve, increased effective area of passage of line style water nozzle 3, reduced restriction loss, thereby increased the pressure in the annular space; When the pressure in the annular space surpassed some limit values, the pressure pushing pressure control sliding sleeve 5 that acts in the pressure chamber 7 moved downwards, complete closing passage, thus turn-off the water filling operation that changes layer; When strata pressure progressively after the pressure release, the pressure that act in the pressure chamber 7 decrease, and spring 10 promotes the 5 upwards operations of pressure control sliding sleeves, and line style water nozzle 3 is opened, and again realizes water filling.
The various embodiments described above only are used for explanation the utility model; wherein the structure of each parts and connected mode etc. all can change to some extent; every equivalents and improvement of carrying out on the basis of technical solutions of the utility model all should do not got rid of outside protection domain of the present utility model.
Claims (7)
1. a pressure is controlled the water injection well safety valve, and it is characterized in that: this safety valve comprises water injection string and injection well downhole flow regulator; Described injection well downhole flow regulator is set on the described water injection string, and the parent tube of described injection well downhole flow regulator is provided with water nozzle; Described injection well downhole flow regulator is arranged with sliding sleeve outward, and described sliding sleeve is provided with circumferential opening; The top of described sliding sleeve is connected with pressure chamber, and the inwall of this pressure chamber is described injection well downhole flow regulator, and the outer wall of described pressure chamber is provided with pressure compensation opening; The bottom of described sliding sleeve is connected with the spring cabin, and the inwall in this spring cabin is described injection well downhole flow regulator, and described spring is provided with spring in the cabin, and the vertical direction of described spring is radially consistent with described water injection string.
2. water injection well safety valve according to claim 1 is characterized in that: described injection well downhole flow regulator is pressure control injection well downhole flow regulator.
3. water injection well safety valve according to claim 1 and 2, it is characterized in that: described water nozzle is the line style water nozzle.
4. water injection well safety valve according to claim 1 and 2, it is characterized in that: described water injection string and injection well downhole flow regulator all are arranged on upper bed-plate and the lower bottom base.
5. water injection well safety valve according to claim 4 is characterized in that: all be threaded connection between described water injection string and injection well downhole flow regulator and described upper bed-plate and the lower bottom base.
6. water injection well safety valve according to claim 1 and 2 is characterized in that: be provided with sealing ring between described sliding sleeve and the described injection well downhole flow regulator.
7. water injection well safety valve according to claim 1 and 2 is characterized in that: be provided with sealing ring between the outer wall of described sliding sleeve and described pressure chamber, be provided with sealing ring between the outer wall in described sliding sleeve and described spring cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263968 CN202673263U (en) | 2012-06-05 | 2012-06-05 | Pressure control water injection well safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263968 CN202673263U (en) | 2012-06-05 | 2012-06-05 | Pressure control water injection well safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673263U true CN202673263U (en) | 2013-01-16 |
Family
ID=47494173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220263968 Expired - Lifetime CN202673263U (en) | 2012-06-05 | 2012-06-05 | Pressure control water injection well safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673263U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720471A (en) * | 2012-06-05 | 2012-10-10 | 中国海洋石油总公司 | Safety valve of pressure control water injection well |
| CN108547602A (en) * | 2018-04-24 | 2018-09-18 | 西南石油大学 | A kind of air water dispenser and method |
-
2012
- 2012-06-05 CN CN 201220263968 patent/CN202673263U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720471A (en) * | 2012-06-05 | 2012-10-10 | 中国海洋石油总公司 | Safety valve of pressure control water injection well |
| CN108547602A (en) * | 2018-04-24 | 2018-09-18 | 西南石油大学 | A kind of air water dispenser and method |
| CN108547602B (en) * | 2018-04-24 | 2020-07-17 | 西南石油大学 | Gas-water separate injection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20150624 |
|
| RGAV | Abandon patent right to avoid regrant |