CN204266985U - A kind of backflow proof device - Google Patents
A kind of backflow proof device Download PDFInfo
- Publication number
- CN204266985U CN204266985U CN201420585388.1U CN201420585388U CN204266985U CN 204266985 U CN204266985 U CN 204266985U CN 201420585388 U CN201420585388 U CN 201420585388U CN 204266985 U CN204266985 U CN 204266985U
- Authority
- CN
- China
- Prior art keywords
- valve
- shell body
- valve seat
- valve core
- proof device
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract description 2
- 235000020681 well water Nutrition 0.000 abstract 1
- 239000002349 well water Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Check Valves (AREA)
Abstract
A kind of backflow proof device, relates to the well head corollary apparatus in a kind of oil exploitation oil-field flooding technique.Its principal character is, lower contact is welded on shell body lower end, and top connection is welded on the left of shell body, valve ball is contained in valve core, and valve seat is sleeved in valve core, and valve seat pressure cap is arranged on the lower end of valve core by screw thread, valve core is arranged in shell body by screw thread, has through hole in the middle part of shell body.Its usefulness is, owing to being fall on valve seat by valve ball deadweight to carry out shutoff, rely on the pressure in well that valve ball and valve seat are closely combined, the return of valve ball is strong, and sealing is reliable, and this backflow proof device can bear higher pressure.Be applicable to reflux water injection well preventing from inject into well water.
Description
Technical field
The utility model relates to the well head corollary apparatus in a kind of oil exploitation oil-field flooding technique.
Background technology
At present in oil-field flooding technique, be that large for water filling tank, water injecting pump and wellhead assembly are linked together by pipeline, utilize water injecting pump to be injected in oil reservoir by the tubing string in wellhead assembly and oil well by the water in large tank.Wellhead assembly is not generally all installed the device preventing from injecting water backflow, if when therefore stopping note for a certain reason, oil reservoir can be caused to return instantaneously tell, oil reservoir excitement is caused to shake out in a large number, there is such situation and will injure oil reservoir, the tubing string in harm oil well and water injecting pump device, and make that great amount of injection water is counter tells ground, cause reduction flood effectiveness, cause mass energy to waste.Although have now various different ball-and-seat, their external and internal compositions, connected mode, be not all suitable for the supporting connection of Water injection well head device.
Utility model content
The purpose of this utility model is to provide a kind of backflow proof device, can prevent the aqueous reflux in water injection well pipeline.
Technical solution of the present utility model realizes like this, a kind of backflow proof device, by shell body 2, lower contact 8, top connection 9 is bound up formation, its special character is, lower contact 8 is welded on shell body 2 lower end, top connection 9 is welded on the left of shell body 2, valve ball 4 is contained in valve core 1, valve seat 5 is sleeved in valve core 1, valve seat pressure cap 6 is arranged on the lower end of valve core 1 by screw thread, valve core 1 is arranged in shell body 2 by screw thread, sealing ring 3 is installed between them, sealing ring 7 is installed between valve seat pressure cap 6 and shell body 2, shell body 2 middle and upper part has the through hole of a transverse direction.
Usefulness of the present utility model is, (1) is fall on valve seat by valve ball deadweight due to this backflow proof device, is blocked by valve base center hole, in well liquid pressure under realize sealing, the return of valve ball is strong, and sealing is reliable.(2) valve core 1 can take out together with valve ball 4, valve seat pressure cap 6 etc. by the utility model, can change valve ball or valve seat easily, easy to maintenance.(3) the utility model is linked by steel clamping band and pipeline, can bear higher (40Mpa) operating pressure.
Accompanying drawing explanation
Accompanying drawing is complete section structural representation of the present utility model.
In figure: 1, valve core; 2, shell body; 3, sealing ring; 4, valve ball; 5, valve seat; 6, valve seat pressure cap; 7, sealing ring; 8, lower contact; 9, top connection.
Detailed description of the invention
Be described further below in conjunction with accompanying drawing: there is in valve core 1 axial blind hole, its middle wall is evenly equipped with the rectangular through holes that 4 longitudinal directions are longer, top has external screw thread and a road sealing groove, bottom has internal thread, the top of valve core 1 has a blind hole, and its sidewall has 4 manholes.Valve seat 5 is one circular, and top has accurate interior chamfering as sealing surface, matches, plays sealing function, can pass through by barrier liquid with valve ball 4 surface.Valve seat pressure cap 6 is a cylindrical shape, and its top has external screw thread, and middle part has 2 road sealing grooves, and its inside is a longitudinal hole.Shell body 2 is a cylindrical shape, and top has internal thread, has step in the endoporus of bottom, has a cross through hole at position on the upper side, the middle part of shell 2.Lower contact 8 has longitudinal center's through hole, and outside is stairstepping cylinder, and it is that trapezoidal ring groove is as seal groove that its lower surface has a cross section.Top connection 9 has transverse center through hole, and outside is stairstepping cylinder, and it is that trapezoidal ring groove is as seal groove that its left side has a cross section.Lower contact 8 is welded on the lower end of shell 2, top connection 9 is welded on shell 2 through hole.Valve ball 4 is a spherosome.Valve ball 4, valve seat 5 are contained in valve core 1 successively, in 2 road sealing grooves of valve seat pressure cap 6, sealing ring 7 are respectively housed, valve seat pressure cap 6 are arranged on the lower end of valve core 1 by screw thread, and valve seat 5 is compressed.In the seal groove of valve core 1, sealing ring 3 is installed, valve core 1 is arranged on shell body 2 by screw thread, form this backflow proof device.
The lower contact 8 of backflow proof device is connected by steel clamping band with the joint carrying out water pipeline of water injection pipe, the water inlet connection of top connection 9 with Water injection well head device is connected by steel clamping band, between the joint of docking mutually, all ring gasket is installed.Make backflow proof device be in vertical state during installation, namely valve ball is seated on the sealing surface of valve seat.When water filling, the water of water injection pipe enters this backflow proof device by lower contact 8, and hydraulic pressure carrys out valve ball 4 jack-up, and water enters water injection well by upper binding head 9, then enters stratum by the water injection string in well.When termination of pumping, valve ball 4 under gravity, can fall immediately, is blocked by the passage of water, in pipeline under hydraulic pressure effect, valve ball is closely combined with sealing surface of seat, avoids the water backflow of injecting stratum.Hydraulic pressure in well in water injection pipe and in wellhead assembly is higher, and larger to the pressure of valve ball, the sealing between valve ball and valve seat is tightr.When it is time for repair, steel rod can be inserted in the hole on valve core 1 top, rotary valve core body 1, takes out valve core 1 together with valve ball 4, valve seat pressure cap 6 etc., replaceable sealing ring, valve ball or valve seat.
The utility model also can be used in other high pressure line, prevents the liquid backflow in pipeline.
Claims (1)
1. a backflow proof device, by shell body (2), lower contact (8), top connection (9) is bound up formation, it is characterized in that, lower contact (8) is welded on shell body (2) lower end, top connection (9) is welded on shell body (2) left side, valve ball (4) is contained in valve core (1), valve seat (5) is sleeved in valve core (1), valve seat pressure cap (6) is arranged on the lower end of valve core (1) by screw thread, valve core (1) is arranged in shell body (2) by screw thread, sealing ring (3) is installed between them, sealing ring (7) is installed between valve seat pressure cap (6) and shell body (2), shell body (2) middle and upper part has the through hole of a transverse direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585388.1U CN204266985U (en) | 2014-09-22 | 2014-09-22 | A kind of backflow proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585388.1U CN204266985U (en) | 2014-09-22 | 2014-09-22 | A kind of backflow proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204266985U true CN204266985U (en) | 2015-04-15 |
Family
ID=52801857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585388.1U Expired - Fee Related CN204266985U (en) | 2014-09-22 | 2014-09-22 | A kind of backflow proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204266985U (en) |
-
2014
- 2014-09-22 CN CN201420585388.1U patent/CN204266985U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 |