CN204492715U - A kind of screw pump backwash valve - Google Patents
A kind of screw pump backwash valve Download PDFInfo
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- CN204492715U CN204492715U CN201520109174.1U CN201520109174U CN204492715U CN 204492715 U CN204492715 U CN 204492715U CN 201520109174 U CN201520109174 U CN 201520109174U CN 204492715 U CN204492715 U CN 204492715U
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- backwash
- valve
- die cavity
- backwash valve
- screw pump
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Abstract
A kind of screw pump backwash valve, belongs to oil exploration equipment field.It is characterized in that: comprise valve chest, valve chest lower end is backwash valve seat (1), valve chest upper end is backwash valve linkage section (2), described valve chest inside is provided with the backwash valve body (3) coaxial with valve chest, backwash valve body (3) inside offers interior die cavity (4), interior die cavity is provided with one or more levels anti-backflow device in (4), interior die cavity (4) top is connected with valve chest, the backwash mouth (9) of die cavity (4) bottom in valve chest sidepiece offers and is communicated with, liquid can be passed through backwash mouth (9), interior die cavity (4) and anti-backflow device and enters in valve chest.This screw pump backwash valve when well-flushing without the need to lift-bolt pump rotor, can be increased work efficiency, safety simple to operate, and can balance petroleum pipeline external and internal pressure, improves underground screw pump group application life.
Description
Technical field
A kind of screw pump backwash valve, belongs to oil exploration equipment field.
Background technology
When utilizing screw pump crude oil extraction, well-flushing is an important ring of exploitation work.The material such as mud skin, paraffin of screw pump petroleum pipeline inwall can wash by well-flushing, thus reaches mining operations requirement.Under prior art, during well-flushing, needing just can carry out well-flushing work by after screw pump rotor taking-up, also needing just can complete by other equipment such as cranes when cleaning.Well-flushing operation is comparatively complicated, and not only cost is high, and greatly affects oil extraction progress, reduces operating efficiency.Simultaneously, to at present in the screw rod electric pump group down-hole operation process of underground, because internal pressure is low, external pressure constantly increases in the increase of depth of falling well, when reaching more than underground screw rod electric pump group frictional resistance, and pump group rotation and initial velocity is very large, reduction rotating speed along with pressure differential reduces until stop the rotation of pump group, motor some mechanical can convert electric energy to, makes cable be in state with voltage, increases the personal safety hidden danger of operating personnel; Due to depth of falling well relation, the pump group rotation frequency is many and rotation rotating speed exceedes pump group rated speed, causes the overload operation of pump group parts, reduces underground screw pump group application life.In order to overcome the above problems, need design one can carry out well-flushing work without the need to lift-bolt pump, and adjustably can descend the backwash valve device of screw rod electric pump group petroleum pipeline internal and external pressure balance in down-hole operation process.
Utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, there is provided one when well-flushing without the need to lift-bolt pump rotor, avoid flushing fluid to the damage of screw pump stator and rotor, increase work efficiency, safety simple to operate, and petroleum pipeline external and internal pressure can be balanced, improve the screw pump backwash valve in underground screw pump group application life.
The utility model solves the technical scheme that its technical problem adopts: this kind of screw pump backwash valve, comprise valve chest, valve chest lower end is backwash valve seat, valve chest upper end is backwash valve linkage section, described valve chest inside is provided with the backwash valve body coaxial with valve chest, backwash valve inner offers interior die cavity, one or more levels anti-backflow device is provided with in interior die cavity, interior die cavity top is connected with valve chest, the backwash mouth of die cavity bottom in valve chest sidepiece offers and is communicated with, liquid can be passed through backwash mouth, interior die cavity and anti-backflow device and enters in valve chest.Liquid is hot water or flushing fluid, and main purpose is the materials such as the paraffin of removal screw pump inwall, after liquid enters valve chest inside, upwards flows, cleans screw pump petroleum pipeline inwall; Anti-backflow device can prevent hot water or flushing fluid from interior die cavity and backwash mouth reflux outside to valve chest.
Preferably, described inner mold cavity wall is provided with multi-stage stairs, every grade of step is equipped with one group of anti-backflow device.Arrange and organize anti-backflow device more, liquid countercurrent can be prevented further.
Described anti-backflow device comprises baffle plate, back-up ring and steel ball, baffle plate is arranged on the step of interior die cavity, baffle plate outer ring and interior die cavity inner ring adapt, back-up ring is arranged on baffle plate top, back-up ring excircle embeds and is arranged in inner mold cavity wall groove, steel ball lower part embeds in the circular hole that is arranged on and baffle plate and back-up ring center offers, and baffle plate, back-up ring centre and backwash valve body offer the passage be connected with backwash mouth.
Described baffle plate outer ring offers a circle seal groove, mounting O-shaped sealing ring in seal groove.The sealing performance at baffle plate place can be ensured.
Described valve chest is docked by upper and lower two parts and forms.Easy to make, conveniently can take apart when needing repairing inner components, safeguarding simple and convenient.
Described backwash valve seat profile is for being provided with externally threaded conical section, and backwash valve seat inside has cylindrical hole.
Described backwash valve linkage section profile is cylindrical, and the female round taper hole of band is offered in backwash valve linkage section inside.Backwash valve seat is all communicated with valve chest inside with backwash valve linkage section is inner.
Compared with prior art, the beneficial effect that this screw pump backwash valve has is:
1, backwash operation can be carried out without the need to lift-bolt pump rotor, increase work efficiency, simple to operate: during well-flushing, liquid can be passed through backwash mouth, interior die cavity and anti-backflow device and enters in valve chest, liquid is hot water or flushing fluid, main purpose is the materials such as the paraffin of removal screw pump petroleum pipeline inwall, after liquid enters valve chest inside, upwards flows, screw pump petroleum pipeline inwall is cleaned, simple to operate, can backwash operation be carried out without the need to lift-bolt pump rotor, increase work efficiency; Meanwhile, this backwash valve is contained in the exit near screw pump, makes flushing fluid not by the stators and rotators of screw pump, avoids the damage of flushing fluid to screw pump stator and rotor.
2, petroleum pipeline external and internal pressure can be balanced, reduce potential safety hazard: petroleum pipeline environmental liquids enters in valve chest by backwash mouth, interior die cavity and anti-backflow device in underground screw rod electric pump group goes into the well process, make petroleum pipeline internal and external pressure balance, pump group is remained static all the time, stop cable and carry out down-hole operation under state with voltage, reduce personal safety hidden danger.
3, underground screw pump group application life is improved: after down-hole operation completes petroleum pipeline internal and external pressure balance, anti-backflow device is closed, and closes backwash valve inner and outside connection, makes pump group parts keep good application life, maintain longer turn(a)round, reduce maintenance cost.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of this screw pump backwash valve.
Wherein: 1, backwash valve seat 2, backwash valve linkage section 3, backwash valve body 4, interior die cavity 5, baffle plate 6, back-up ring 7, steel ball 8, O RunddichtringO 9, backwash mouth.
Detailed description of the invention
Fig. 1 is most preferred embodiment of the present utility model, is described further below in conjunction with accompanying drawing 1 pair of the utility model.
With reference to accompanying drawing 1: a kind of screw pump backwash valve, comprises valve chest, valve chest is docked by upper and lower two parts and forms.Valve chest lower end is backwash valve seat 1, and valve chest upper end is backwash valve linkage section 2, and backwash valve seat 1 profile is for being provided with externally threaded conical section, and backwash valve seat 1 inside has cylindrical hole.Backwash valve linkage section 2 profile is cylindrical, and the female round taper hole of band is offered in backwash valve linkage section 2 inside.
Valve chest inside is provided with the backwash valve body 3 coaxial with valve chest, backwash valve body 3 inside offers interior die cavity 4, two-stage anti-backflow device is provided with in interior die cavity 4, interior die cavity 4 top is connected with valve chest, the backwash mouth 9 of die cavity 4 bottom in valve chest sidepiece offers and is communicated with, liquid can be passed through backwash mouth 9, interior die cavity 4 and anti-backflow device and enters in valve chest.
Anti-backflow device comprises baffle plate 5, back-up ring 6 and steel ball 7, baffle plate 5 is arranged on the step of interior die cavity 4, baffle plate 5 outer ring and interior die cavity 4 inner ring adapt, back-up ring 6 is arranged on baffle plate 5 top, back-up ring 6 excircle embeds and is arranged in interior die cavity 4 inboard wall groove, baffle plate 5 outer ring offers a circle seal groove, mounting O-shaped sealing ring 8 in seal groove.Steel ball 7 lower part embeds in the circular hole that is arranged on and baffle plate 5 and back-up ring 6 center offers, realizes sealing.Baffle plate 5, back-up ring 6 centre offer with backwash valve body 3 passage be connected with backwash mouth 9.
This screw pump backwash valve is arranged on the centre position of screw pump petroleum pipeline, distance import about 500 meters.On the one hand, just can reach the effect of well-flushing with a small amount of hot water or flushing fluid when anti-flushing well.In addition on the one hand, below 500 meters, well temperature is higher, and the possibility of petroleum pipeline wax deposition is smaller, so consider, only needs more than the 500 meters positions cleaning petroleum pipeline.During well-flushing, hot water or flushing fluid are introduced in oil well, after hot water or flushing fluid pass through the passage of backwash mouth 9 and backwash valve body 3 bottom, the steel ball 7 that fluid pressure promotes bottom moves upward, open channel, it is inner that liquid enters backwash valve body 3, then the steel ball 7 on jack-up top, then flow out from backwash valve body 3 top, hot water or flushing fluid continue to add, finally along screw pump petroleum pipeline inwall upwards flow circuit to well head, screw pump petroleum pipeline inwall is cleaned.Anti-backflow device can prevent hot water or flushing fluid from interior die cavity 4 and backwash mouth 9 reflux outside to valve chest.
Owing to arranging this screw pump backwash valve, in underground, screw rod electric pump group is gone into the well in process, after environmental liquids passes through the passage of backwash mouth 9 and backwash valve body 3 bottom, the weight overcoming steel ball 7 enters into backwash valve body 3 inside, make internal and external pressure balance, pump group is remained static all the time, prevent changes mechanical energy from being electric energy, stop cable and carry out down-hole operation under state with voltage, reduce personal safety hidden danger.
After down-hole operation completes, steel ball 7 falls after rise under the effect of own wt, closes the connection that backwash valve body 3 is inner and outside, makes underground screw pump group parts keep good application life, maintain longer turn(a)round, reduces maintenance cost.
This backwash valve is contained in the exit near screw pump, makes flushing fluid not by the stators and rotators of screw pump, avoids the damage of flushing fluid to screw pump stator and rotor.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (7)
1. a screw pump backwash valve, it is characterized in that: comprise valve chest, valve chest lower end is backwash valve seat (1), valve chest upper end is backwash valve linkage section (2), described valve chest inside is provided with the backwash valve body (3) coaxial with valve chest, backwash valve body (3) inside offers interior die cavity (4), interior die cavity is provided with one or more levels anti-backflow device in (4), interior die cavity (4) top is connected with valve chest, the backwash mouth (9) of die cavity (4) bottom in valve chest sidepiece offers and is communicated with, liquid can be passed through backwash mouth (9), interior die cavity (4) and anti-backflow device enter in valve chest.
2. a kind of screw pump backwash valve according to claim 1, is characterized in that: described interior die cavity (4) inwall is provided with multi-stage stairs, every grade of step is equipped with one group of anti-backflow device.
3. a kind of screw pump backwash valve according to claim 1 and 2, it is characterized in that: described anti-backflow device comprises baffle plate (5), back-up ring (6) and steel ball (7), baffle plate (5) is arranged on the step of interior die cavity (4), baffle plate (5) outer ring and interior die cavity (4) inner ring adapt, back-up ring (6) is arranged on baffle plate (5) top, back-up ring (6) excircle embeds and is arranged in interior die cavity (4) inboard wall groove, steel ball (7) lower part embeds in the circular hole that is arranged on and baffle plate (5) and back-up ring (6) center offers, baffle plate (5), back-up ring (6) centre and backwash valve body (3) offer the passage be connected with backwash mouth (9).
4. a kind of screw pump backwash valve according to claim 3, is characterized in that: described baffle plate (5) outer ring offers a circle seal groove, mounting O-shaped sealing ring (8) in seal groove.
5. a kind of screw pump backwash valve according to claim 1, is characterized in that: described valve chest is docked by upper and lower two parts and forms.
6. a kind of screw pump backwash valve according to claim 1, is characterized in that: described backwash valve seat (1) profile is for being provided with externally threaded conical section, and backwash valve seat (1) inside has cylindrical hole.
7. a kind of screw pump backwash valve according to claim 1, is characterized in that: described backwash valve linkage section (2) profile is cylindrical, and the female round taper hole of band is offered in backwash valve linkage section (2) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109174.1U CN204492715U (en) | 2015-02-15 | 2015-02-15 | A kind of screw pump backwash valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109174.1U CN204492715U (en) | 2015-02-15 | 2015-02-15 | A kind of screw pump backwash valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204492715U true CN204492715U (en) | 2015-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520109174.1U Active CN204492715U (en) | 2015-02-15 | 2015-02-15 | A kind of screw pump backwash valve |
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| Country | Link |
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| CN (1) | CN204492715U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594836A (en) * | 2015-02-15 | 2015-05-06 | 山东颜山泵业有限公司 | Backwash valve of screw pump |
| CN108050265A (en) * | 2017-12-07 | 2018-05-18 | 东北石油大学 | A kind of wide range pressure-regulating valve |
-
2015
- 2015-02-15 CN CN201520109174.1U patent/CN204492715U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594836A (en) * | 2015-02-15 | 2015-05-06 | 山东颜山泵业有限公司 | Backwash valve of screw pump |
| CN108050265A (en) * | 2017-12-07 | 2018-05-18 | 东北石油大学 | A kind of wide range pressure-regulating valve |
| CN108050265B (en) * | 2017-12-07 | 2019-07-02 | 东北石油大学 | A kind of wide range pressure-regulating valve |
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