CN206972202U - Water injection well impressed current method anti-corrosive apparatus - Google Patents
Water injection well impressed current method anti-corrosive apparatus Download PDFInfo
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- CN206972202U CN206972202U CN201720490333.6U CN201720490333U CN206972202U CN 206972202 U CN206972202 U CN 206972202U CN 201720490333 U CN201720490333 U CN 201720490333U CN 206972202 U CN206972202 U CN 206972202U
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- water injection
- sleeve pipe
- oil pipe
- injection well
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Abstract
The anti-corrosive apparatus on water injection well in oil fields is the utility model is related to, more particularly to a kind of water injection well impressed current method anti-corrosive apparatus.Lead to including water injection pipe, non-conductive centralizer, oil pipe, sleeve pipe and power supply, its middle sleeve is arranged in pit shaft, in oil pipe tripping in sleeve pipe and upper end is connected with set pipe insulation, spacer sleeve is provided with multiple non-conductive centralizers on the oil pipe, the logical bottom of the water injection pipe is connected with oil pipe, the plus earth of the power supply, negative electrode leads to water injection pipe to be connect, the tail end of the oil pipe is with sleeve pipe by contacting conducting, electric current is set to be transmitted to from the upper end of oil pipe through tail end on sleeve pipe, then the anode through the earth and dc source forms closed-loop path.The utility model improves the oil pipe, sleeve pipe, the service life of downhole tool of water injection well, reduces the workover treatment of water injection well, reduces water filling cost, improves the economic benefit in oil field.
Description
Technical field
The anti-corrosive apparatus on water injection well in oil fields is the utility model is related to, is prevented more particularly to a kind of water injection well impressed current method
Rotten device.
Background technology
All there is etching problem in oil pipe, sleeve pipe, the downhole tool of water injection well, prevent the measure of above-mentioned corrosion at present and have a lot
Kind, but be all that individually a kind of instrument carries out anti-corrosion to it, it is entitled such as Patent No. 201220522703.7《The poly- second of high pressure
Alkene antisepsis oil pipe》Chinese utility model patent, be exactly oil pipe anti-corrosive can only can not to be prevented the other instruments and sleeve pipe in well
Corruption, and for example Patent No. 201220650010.6, entitled《The long anti-casing corrosion Well-cleaning protection device of tail pipe》China it is practical
New patent, and anti-corrosion can only be unable to the other instruments and oil pipe in well to casing tube anti-corrosive.Office be present in above-mentioned anti-corrosion measure
It is sex-limited, so, oil pipe, sleeve pipe, the downhole tool of water injection well still have etching problem, cause the oil pipe, sleeve pipe, well of water injection well
The service life of lower instrument is short, it is necessary to which frequent workover treatment, the oil field production cost of waterflooding extraction is high, deficiency in economic performance.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of water injection well impressed current method anti-corrosive apparatus, with
Overcome the above-mentioned oil pipe, sleeve pipe, the service life of downhole tool that problem be present, improve water injection well, the well workover for reducing water injection well is made
Industry, water filling cost is reduced, improve the economic benefit in oil field.
To achieve these goals, the utility model uses following technical scheme：
A kind of water injection well impressed current method anti-corrosive apparatus, including water injection pipe is logical, non-conductive centralizer, oil pipe, sleeve pipe and straight
Flow power supply, its middle sleeve is arranged in pit shaft, and in oil pipe tripping in sleeve pipe and upper end is connected with covering pipe insulation, on the oil pipe between
Spacer is provided with multiple non-conductive centralizers, and the logical bottom of the water injection pipe is connected with oil pipe, the plus earth of the dc source,
Negative electrode leads to water injection pipe to be connect, and the tail end of the oil pipe, by contacting conducting, allows electric current to be passed through from the upper end of oil pipe with sleeve pipe
Tail end is transmitted on sleeve pipe, then the anode through the earth and dc source forms closed-loop path.
The logical side of the water injection pipe is provided with water inlet, and the water inlet connects with surface line insulation.
Conductor is installed in the tail end of the oil pipe, the outside of the conductor contacts with described sleeve pipe, the conductor
The conductance of the oil pipe tail end is entered into sleeve pipe.
The top installation set pipe connection of described sleeve pipe, the oil pipe top connection hanger, the oil pipe it is upper
Portion is suspended on sleeve pipe connection device by hanger, and the logical bottom of the water injection pipe is connected with hanger, in hanger and set
Mounting insulation tube between pipe connection.
The side of described sleeve pipe attachment means is provided with valve, and the valve is used to control the pressure in sleeve pipe.The set
Pipe connection is provided with the antifleeing mechanism for preventing the oil pipe axial float.
The logical lower end of the water injection pipe is connected dress with described sleeve pipe by flange and described sleeve pipe attachment means, the flange
Insulating element is provided between putting.
Described sleeve pipe attachment means and the hanger are cone match, and the insulating cylinder is conical sleeve.
The advantages of the utility model and beneficial effect are：The negative electrode of dc source is connected to water injection pipe and led to by the utility model
On, the plus earth of dc source, after circuit communication, oil pipe, sleeve pipe, downhole tool are thus cathodically polarised, and obtain oil pipe, sleeve pipe
Complete cathodic protection, so as to preventing oil pipe, sleeve pipe, downhole tool to be corroded.Therefore, the utility model is overcome in water filling
It is insufficient present in the existing aseptic technic used in well, the oil pipe, sleeve pipe, downhole tool of water injection well can be prevented to be corroded, energy
The oil pipe, sleeve pipe, the service life of downhole tool of water injection well are improved, reduces the workover treatment of water injection well, water filling cost is reduced, carries
The economic benefit in high oil field.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1 leads to for water injection pipe, and 2 be hanger, and 3 be insulating cylinder, and 4 be muff-joint device, and 5 be non-conductive centralizer,
6 be oil pipe, and 7 be sleeve pipe, and 8 be conductor, and 9 be dc source.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in detail example.
As shown in figure 1, a kind of water injection well impressed current method anti-corrosive apparatus provided by the utility model, including water injection pipe lead to 1,
Non-conductive centralizer 5, oil pipe 6, sleeve pipe 7 and dc source 9, its middle sleeve 7 are arranged in pit shaft, in the tripping in sleeve pipe 7 of oil pipe 6,
And the insulation of upper end and sleeve pipe 7 connects, spacer sleeve is provided with multiple non-conductive centralizers 5 on oil pipe 6, make oil pipe 6 in addition to tail end not with
Sleeve pipe 7 is contacted, and the bottom of water injection pipe logical 1 is connected with oil pipe 6.The plus earth of dc source 9, negative electrode are connected with water injection pipe logical 1,
The tail end of oil pipe 6 is turned on sleeve pipe 7 by contacting, and electric current is transmitted to from the upper end of oil pipe 6 through tail end on sleeve pipe 7, then
Anode through the earth and dc source 9 forms closed-loop path.
The side of water injection pipe logical 1 is provided with water inlet, and water inlet is insulated with surface line by insulating element to be connected.Water-injection station
Water injected into well by surface line, insulating element is connected on surface line, electric current is blocked at insulating element,
Electric current will not flow away along surface line, allow electric current to be flowed according to the circuit of design, described insulating element is close to lead to 1 with water injection pipe
Junction.
Further, conductor 8 is installed in the tail end of oil pipe 6, the outside of conductor 8 contacts with sleeve pipe 7, and conductor 8 will
The conductance of the tail end of oil pipe 6 enters sleeve pipe 7.Conductor 8 uses conductive metal material, and its profile is similar to centralizer, can make oil pipe 6 with
Sleeve pipe 7 is forcibly turned on conduction.
Further, the top installation set pipe connection 4 of sleeve pipe 7, the top connection hanger 2 of oil pipe 6, oil pipe 6
Top is suspended on sleeve pipe connection device 4 by hanger 2, and the bottom of water injection pipe logical 1 is connected with hanger 2, in hanger 2 and
Mounting insulation tube 3 between sleeve pipe connection device 4, make the top of sleeve pipe 7 and the top of oil pipe 6 and water injection pipe logical 1 non-conductive.Sleeve pipe
The side of attachment means 4 is provided with valve, and valve is used to control the pressure in sleeve pipe 7.
In an embodiment of the present utility model, the upper end of sleeve pipe connection device 4 is provided with bellmouth, and the lower end of hanger 2 is
Pyramidal structure and coordinated by the bellmouth of the pyramidal structure and the upper end of sleeve pipe connection device 4, positioned at sleeve pipe connection device 4 with
Insulating cylinder 3 between hanger 2 is conical sleeve.
Further, sleeve pipe connection device 4 is provided with the antifleeing mechanism for preventing the axial float of oil pipe 6.Antifleeing mechanism can be adopted
With the jackscrew for being arranged at sleeve pipe connection device 4 (i.e. the big four of well head) upper flange, its effect is exactly to suppress hanger 2, to prevent
The only play of hanger 2.
Other downhole tools, such as packer instrument can also be connected on oil pipe 6, the downhole tool of institute's tripping in will not make
Oil pipe 6 is conductive with sleeve pipe 7, ensures that electric current flows away by the circuit of design.
The namely water injection pipe of oil pipe 6, is also referred to as oil pipe by the water injection pipe in water injection well at the scene.If water injection pipe logical 1
Bottom is connected by flange with sleeve pipe connection device 4, then needs to add insulating element, this technical scheme in both junctions
It is the scope of protection of the utility model.
The utility model is also applied for the anti-corrosion of gas recovery well, flowing well.If inclined shaft, the tail end of oil pipe 6 just can be with set
Pipe 7 contacts, it is not necessary to installs conductor 8.
Operation principle of the present utility model is：
The negative electrode of dc source 9 is connected on water injection pipe logical 1, the plus earth of dc source 9, after circuit communication, oil
Pipe 6, sleeve pipe 7 and downhole tool are thus cathodically polarised, and oil pipe 6 and sleeve pipe 7 is obtained complete cathodic protection, so as to prevent oil pipe
6th, sleeve pipe 7 and downhole tool are corroded.
In summary, the utility model overcomes insufficient present in the existing aseptic technic used in water injection well, energy
Prevent the oil pipe, sleeve pipe, downhole tool of water injection well to be corroded, the oil pipe, sleeve pipe, the use longevity of downhole tool of water injection well can be improved
Life, the workover treatment of water injection well is reduced, reduce water filling cost, improve the economic benefit in oil field.
Embodiment of the present utility model is the foregoing is only, is not intended to limit the scope of protection of the utility model.It is all
Made within spirit of the present utility model and principle any modification, equivalent substitution and improvements, extension etc., are all contained in this reality
With in new protection domain.
Claims (8)
1. a kind of water injection well impressed current method anti-corrosive apparatus, it is characterised in that lead to (1), non-conductive centralizer including water injection pipe
(5), oil pipe (6), sleeve pipe (7) and dc source (9), its middle sleeve (7) are arranged in pit shaft, oil pipe (6) tripping in sleeve pipe (7)
Interior and upper end connects with sleeve pipe (7) insulation, and spacer sleeve is provided with multiple non-conductive centralizers (5), the note on the oil pipe (6)
The bottom that water pipe leads to (1) is connected with oil pipe (6), and negative electrode and the water injection pipe of the dc source (9) lead to (1) and be connected, plus earth,
The tail end of the oil pipe (6) by contacting conducting, allows electric current to be transmitted to from the upper end of oil pipe (6) through tail end with sleeve pipe (7)
On sleeve pipe (7), then the anode through the earth and dc source (9) forms closed-loop path.
2. water injection well impressed current method anti-corrosive apparatus according to claim 1, it is characterised in that the water injection pipe leads to (1)
Side be provided with water inlet, the water inlet connects with surface line insulation.
3. water injection well impressed current method anti-corrosive apparatus according to claim 1, it is characterised in that the tail of the oil pipe (6)
End installation conductor (8), the outside of the conductor (8) contacts with described sleeve pipe (7), and the conductor (8) is by the oil pipe
(6) electric current of tail end imports sleeve pipe (7).
4. water injection well impressed current method anti-corrosive apparatus according to claim 1, it is characterised in that described sleeve pipe (7) it is upper
Portion's installation set pipe connection (4), the top connection hanger (2) of the oil pipe (6), the top of the oil pipe (6), which passes through, to hang
Hanging device (2) is suspended on sleeve pipe connection device (4), and the bottom that the water injection pipe leads to (1) is connected with hanger (2), the suspension
Insulating cylinder (3) is installed between device (2) and sleeve pipe connection device (4).
5. water injection well impressed current method anti-corrosive apparatus according to claim 4, it is characterised in that described sleeve pipe attachment means
(4) side is provided with valve, and the valve is used to control the pressure in sleeve pipe (7).
6. water injection well impressed current method anti-corrosive apparatus according to claim 4, it is characterised in that described sleeve pipe attachment means
(4) being provided with prevents the antifleeing mechanism of the oil pipe (6) axial float.
7. water injection well impressed current method anti-corrosive apparatus according to claim 4, it is characterised in that the water injection pipe leads to (1)
Lower end by flange and described sleeve pipe attachment means (4), insulation is provided between the flange and described sleeve pipe attachment means (4)
Part.
8. water injection well impressed current method anti-corrosive apparatus according to claim 4, it is characterised in that described sleeve pipe attachment means
(4) it is cone match with the hanger (2), the insulating cylinder (3) is conical sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720490333.6U CN206972202U (en) | 2017-05-04 | 2017-05-04 | Water injection well impressed current method anti-corrosive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720490333.6U CN206972202U (en) | 2017-05-04 | 2017-05-04 | Water injection well impressed current method anti-corrosive apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972202U true CN206972202U (en) | 2018-02-06 |
Family
ID=61413013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720490333.6U Active CN206972202U (en) | 2017-05-04 | 2017-05-04 | Water injection well impressed current method anti-corrosive apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938824A (en) * | 2018-09-21 | 2020-03-31 | 中国石油天然气股份有限公司 | Deep well anode device |
-
2017
- 2017-05-04 CN CN201720490333.6U patent/CN206972202U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938824A (en) * | 2018-09-21 | 2020-03-31 | 中国石油天然气股份有限公司 | Deep well anode device |
| CN110938824B (en) * | 2018-09-21 | 2021-11-02 | 中国石油天然气股份有限公司 | Deep well anode device |
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