CN107779874A - A kind of anticorrosion structure for metallic conduit - Google Patents
A kind of anticorrosion structure for metallic conduit Download PDFInfo
- Publication number
- CN107779874A CN107779874A CN201610722279.3A CN201610722279A CN107779874A CN 107779874 A CN107779874 A CN 107779874A CN 201610722279 A CN201610722279 A CN 201610722279A CN 107779874 A CN107779874 A CN 107779874A
- Authority
- CN
- China
- Prior art keywords
- tank body
- sleeve
- water
- annular space
- sacrificial anode
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/10—Electrodes characterised by the structure
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a kind of anticorrosion structure for metallic conduit, the tank body and back with water inlet line and water injection pipe of ring flange are provided with including middle part, dividing plate and plugging plate are arranged at intervals with the inwall of tank body side, multiple second sacrificial anodes are installed on tank body opposite side inwall, the both ends of sleeve extend through the dividing plate and plugging plate, back with water inlet line described in sleeve face, the annular space of a closing is formed between sleeve and tank body, multiple first sacrificial anodes are fixed in the annular space, multiple permeable holes connected with annular space are provided with dividing plate, multiple openings connected with annular space are provided with one end outer wall of the sleeve close to plugging plate.Handled in the processing to injecting water using classification, pre- anti-corrosion is carried out in primary treatment cavity, and main anti-corrosion is carried out in two stage treatment cavity, so that the live load of the sacrificial anode in tank body substantially reduces, the sacrificial anode in tank body is avoided quick consumption occur and frequently change, the production cost during reduction oil exploitation in water filling process.
Description
Technical field
The present invention relates to petroleum pipeline corrosion-resistant field, in particular to a kind of anticorrosion structure for metallic conduit.
Background technology
At present, the etching problem of oil field pipe mainly embodies a concentrated expression of waterflood-transmission line, hot backwater, steam tracing pipeline, height
On the production facility in oil field such as aqueous petroleum pipeline and tanks portion, sewage disposal device.But prolonging with the development time
Long, formation pressure declines, and elasticity exploitation can not meet the requirement of exploitation, in order to balance formation pressure, and also to protection ring
Border, it is necessary to the separation water to production fluid handle after re-injection to oil reservoir, after re-injection process needs substantial amounts of pipelined processing
Production fluid separation water, due to production fluid separation water complicated component, bacterial reproduction is serious, the also companion in addition to corrosivity is very strong
With there is fouling, serious corrosion can be produced to the pipeline inwall of conveying, in addition, it is higher to manage defeated pressure, typically left in 10MPa
The right side, high reaches 30-40MPa, and corrosion easily causes pipeline cracking and perforation, and sewage leaks outside, and on the one hand causes the note of large area
Well stops noting, and influences the completion with fluence.
The method that the control of the interior anti-corrosion to the defeated process of line pipe and underdeposit corrosion is taken at present be add corrosion inhibiter with
Corrosion inhibiting and descaling agent, but due to the complexity of pumped (conveying) medium composition, the polytropy of defeated technique is managed, the corrosion of pipeline can not obtain effectively
Control, the particularly underdeposit corrosion of pipeline can not reach control mesh by adding corrosion inhibiter with spot corrosion perforation with corrosion inhibiting and descaling agent
, pipeline corrosion still frequently occurs with corrosion failure, perforation, and the production to oil field causes huge economic loss, and sacrificial
Domestic animal anodic protection technology can effectively control production fluid separation water and corrosion of the return water to pipeline inwall, but due to pipeline
Internal diameter is small, can not insert sacrificial anode, and in the injecting process, the loss to sacrificial anode is larger, adds particularly in water injection well
, it is necessary to frequently be changed to sacrificial anode when noting the injection water to be differed greatly with underground water compatibility, opening for oil well is exacerbated
Adopt cost.
The content of the invention
It is an object of the invention to provide a kind of anticorrosion structure for metallic conduit, is handled to injection water to carry
In high oil well while the corrosion resistant degree of corrosion of water filling inside pipe wall, the production cost in water injection technology is reduced.
The purpose of the present invention is achieved through the following technical solutions：
A kind of anticorrosion structure for metallic conduit, including middle part are provided with the tank body of ring flange and connected respectively with tank body both ends
The back with water inlet line and water injection pipe connect, dividing plate and plugging plate are arranged at intervals with the inwall of the tank body side, it is another in the tank body
Multiple second sacrificial anodes are installed, the both ends of sleeve extend through the dividing plate and plugging plate, sleeve face on the inwall of side
The back with water inlet line, and an annular space closed is formed between sleeve and tank body, multiple first sacrificial anodes are fixed on described
In annular space, and multiple permeable holes connected with annular space are provided with dividing plate, on one end outer wall of the sleeve close to plugging plate
It is provided with multiple openings connected with annular space；Also include the eddy flow valve being arranged in sleeve, the eddy flow valve and the dividing plate are same
The heart.
For huge consumption of the sacrificial anode in the prior art in water injection technology, inventor passes through to external sacrificial anode
Improvement, by inject water two stages for the treatment of, while sacrificial anode extent of deterioration is reduced, improve to injection water processing
Rank, and then the pre- preceding anti-corrosion to water injection pipe is realized, reduce corrosion and corrosion failure, the perforation probability of waterflood-transmission line.In use,
Injection water is flowed into tank body by back with water inlet line, and tank interior space is separated into two parts by its median septum with plugging plate,
Inject the primary treatment cavity and two stage treatment cavity of water；Shunting into the injection water in tank body by dividing plate and sleeve
Afterwards, it is divided into two-way to circulate in tank body, the first via injects water by after permeable hole entering in rear annular space, that is, enters primary treatment
In cavity, entered after being chemically reacted with the first sacrificial anode, then by opening in sleeve, and the second tunnel injection water
Then entered directly into by sleeve in two stage treatment cavity, while the first injection water after primary treatment equally enters with sleeve
Enter into two stage treatment cavity, finally after being chemically reacted with the second sacrificial anode, be discharged in water injection pipe；By
Injection water after handling twice circulates in water injection pipe, and the probability to be chemically reacted with the tube wall of metal material substantially reduces,
Reduce the probability that chemical attack occurs on water filling inside pipe wall so that in the water injection technology of oil well, the use of water injection pipe
Life-span greatly improves.And handled in the processing to injecting water using classification, pre- anti-corrosion is carried out in primary treatment cavity, and at two level
Manage and main anti-corrosion is carried out in cavity so that the live load of the sacrificial anode in tank body substantially reduces, and avoids sacrificial in tank body
There is quick consumption and frequently changed, the production cost during reduction oil exploitation in water filling process in domestic animal anode.Wherein, it is primary
The first sacrificial anode consumption in process chambers is slower, and the second sacrificial anode consumption in two stage treatment cavity is very fast, right
When sacrificial anode is changed, ring flange is provided with the middle part of tank body, the carry out to the second sacrificial anode can be facilitated quick
Change, to maintain the lasting processing in tank body to injecting water, and eddy flow valve be provided with sleeve, avoid enter into sleeve with
And on the premise of the injection water reflux Jing Guo primary treatment, can be according to injection water-carrying capacity and the concrete condition of flow velocity, to control
The circulation of injection water, prevents that the second sacrificial anode load in two stage treatment cavity is excessive in tank body, avoids in tank body to note
Enter handling not thorough and causing the generation for occurring phenomena such as corrosion and scaling in water injection pipe for water.
The internal diameter of the sleeve account for the tank body internal diameter 13 ~ 12.Two parts are divided into the processing for injecting water in tank body,
Supplemented by primary treatment cavity, based on two stage treatment cavity, and the aperture of permeable hole and opening in process chambers are handled
Smaller, i.e., the injection water-carrying capacity handled in primary treatment cavity is relatively small, and most of injection water warp entered in tank body
Cross sleeve to flow into two stage treatment cavity, the internal diameter of sleeve is arranged to the 2 of 13 ~ 1 of the tank body internal diameter, that is, ensured in sleeve
It is interior, injection water after primary treatment and two stage treatment chamber is entered in proper proportions without the injection water of any processing
In vivo so that the second sacrificial anode realize to inject water preservative treatment efficiency it is maximized simultaneously, reduce second sacrifice
The consumption of anode, ensure that the second sacrificial anode in tank body realizes optimal consumption and income ratio.
Second sacrificial anode is more than first sacrificial anode along tank body radially along tank body length radially
Length.Annular space space of the arrangement of first sacrificial anode between by sleeve and inner tank wall is limited, while is flowing through primary place
Manage cavity and the injection water-carrying capacity difference in two stage treatment cavity is larger, therefore, the core of the second sacrificial anode is set
In the position closer to tank body axis so that contact of second sacrificial anode with injecting water is more abundant, to realize that second is sacrificial
The treatment effeciency of domestic animal anode maximizes.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention is handled in the processing to injecting water using classification, the pre- anti-corrosion of progress in primary treatment cavity, and two stage treatment
Main anti-corrosion is carried out in cavity so that the live load of the sacrificial anode in tank body substantially reduces, and avoids the sacrifice in tank body
There is quick consumption and frequently changed, the production cost during reduction oil exploitation in water filling process in anode；
2nd, the present invention is in sleeve, injection water after primary treatment and without the injection water of any processing suitably to compare
Example is entered in two stage treatment cavity so that the second sacrificial anode is realizing the maximized of the preservative treatment efficiency to injecting water
Meanwhile reduce the consumption of the second sacrificial anode, ensure that the second sacrificial anode in tank body realizes optimal consumption and income ratio；
3rd, the core of the second sacrificial anode is arranged on the position closer to tank body axis by the present invention so that second sacrifices
Contact of the anode with injecting water is more abundant, to realize that the treatment effeciency of the second sacrificial anode maximizes.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Mark and corresponding parts title in accompanying drawing：
1- back with water inlet line, 2- permeable holes, 3- dividing plates, 4- sleeves, the sacrificial anodes of 5- first, 6- tank bodies, 7- openings, 8- closure
Plate, the sacrificial anodes of 9- second, 10- water injection pipes, 11- ring flanges, 12- eddy flow valves.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
It is provided with the tank body 6 of ring flange 11 as shown in figure 1, the present embodiment includes middle part and is connected respectively with the both ends of tank body 6
Back with water inlet line 1 and water injection pipe 10, dividing plate 3 and plugging plate 8 are arranged at intervals with the side inwall of tank body 6, in the tank body 6
Multiple second sacrificial anodes 9 are installed, the both ends of sleeve 4 extend through the dividing plate 3 and plugging plate 8, set on opposite side inwall
Back with water inlet line 1 described in 4 faces of cylinder, and an annular space closed, multiple first sacrificial anodes 5 are formed between sleeve 4 and tank body 6
It is fixed in the annular space, and multiple permeable holes 2 connected with annular space is provided with dividing plate 3, in the sleeve 4 close to plugging plate
Multiple openings 7 connected with annular space are provided with 8 one end outer wall；Also include the eddy flow valve 12 being arranged in sleeve 4, the rotation
Flow valve 12 and the dividing plate 3 is concentric.
For huge consumption of the sacrificial anode in the prior art in water injection technology, inventor passes through to external sacrificial anode
Improvement, by inject water two stages for the treatment of, while sacrificial anode extent of deterioration is reduced, improve to injection water processing
Rank, and then the pre- preceding anti-corrosion to water injection pipe 10 is realized, reduce corrosion and corrosion failure, the perforation probability of the line of water injection pipe 10.Make
Used time, injection water are flowed into tank body 6 by back with water inlet line 1, and the inner space of tank body 6 is separated into by its median septum 3 with plugging plate 8
Two parts, that is, inject the primary treatment cavity and two stage treatment cavity of water；Into the injection water in tank body 6 by dividing plate 3 with
And after the shunting of sleeve 4, be divided into two-way and circulated in tank body 6, the first via injects water by entering after permeable hole 2 in rear annular space,
Enter in primary treatment cavity, set is entered after being chemically reacted with the first sacrificial anode 5, then by opening 7
In cylinder 4, and the second tunnel injection water is then entered directly into two stage treatment cavity by sleeve 4, while after primary treatment
First injection water is equally entered in two stage treatment cavity with sleeve 4, finally by being chemically reacted with the second sacrificial anode 9
Afterwards, it is discharged in water injection pipe 10；Injection water after handling twice circulates in water injection pipe 10, and with the tube wall of metal material
The probability to chemically react substantially reduces, that is, reduces the probability that chemical attack occurs on the inwall of water injection pipe 10 so that in stone
In the water injection technology of oil well, the service life of water injection pipe 10 greatly improves.And handled in the processing to injecting water using classification, just
Pre- anti-corrosion is carried out in level process chambers, and main anti-corrosion is carried out in two stage treatment cavity so that sacrificial anode in tank body 6
Live load substantially reduces, and avoids the sacrificial anode in tank body 6 from quick consumption occur and frequently change, reduces oil exploitation process
Production cost in middle water filling process.Wherein, the first sacrificial anode 5 in primary treatment cavity consumes relatively slow, and two stage treatment
The second sacrificial anode 9 in cavity consumes comparatively fast, and when being changed to sacrificial anode, the middle part of tank body 6 is provided with flange
Disk 11, the carry out quick-replaceable to the second sacrificial anode 9 can be facilitated, to maintain the lasting processing in tank body 6 to injecting water, and
And eddy flow valve 12 is provided with sleeve 4, avoiding enter into sleeve 4 and the premise for injecting water reflux by primary treatment
Under, to control the circulation of injection water in tank body 4, it can be prevented according to injection water-carrying capacity and the concrete condition of flow velocity at two level
The load of the second sacrificial anode 9 managed in cavity is excessive, avoids the processing in tank body 6 to injecting water not thorough and causes water injection pipe 10
Inside there is the generation of phenomena such as corrosion and scaling.
Preferably, the internal diameter of the sleeve 4 account for the internal diameter of tank body 613 ~ 12.To the place of injection water in tank body 6
Reason be divided into two parts, supplemented by primary treatment cavity, based on two stage treatment cavity, and in process chambers are handled permeable hole 2 with
And the aperture of opening 7 is smaller, i.e., the injection water-carrying capacity handled in primary treatment cavity is relatively small, and major part enters tank
Injection water in body 6 is flowed into two stage treatment cavity by sleeve 4, by the internal diameter of sleeve 4 be arranged to the internal diameter of tank body 61
3 ~ 12, that is, ensure in sleeve 4, after primary treatment injection water and without any processing injection water with suitable
Ratio is entered in two stage treatment cavity so that the second sacrificial anode 9 is in the maximum for realizing the preservative treatment efficiency to injecting water
While change, reduce the consumption of the second sacrificial anode 9, ensure that the second sacrificial anode 9 in tank body 6 realizes optimal consumption and receipts
Beneficial ratio.
Wherein, the second sacrificial anode 9 in the present embodiment is more than first sacrificial anode along the length of tank body 6 radially
5 length along tank body 6 radially.Annular space space of the arrangement of first sacrificial anode 5 between by sleeve 4 and the inwall of tank body 6 limits
System, at the same flow through primary treatment cavity with two stage treatment cavity injection water-carrying capacity difference it is larger, therefore, by second sacrifice
The core of anode 9 is arranged on the position closer to the axis of tank body 6 so that the second sacrificial anode 9 and the contact for injecting water
It is more abundant, to realize that the treatment effeciency of the second sacrificial anode 9 maximizes.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of anticorrosion structure for metallic conduit, including middle part are provided with ring flange（11）Tank body（6）And respectively with
Tank body（6）The back with water inlet line of both ends connection（1）And water injection pipe（10）, it is characterised in that：In the tank body（6）Between on the inwall of side
Every being provided with dividing plate（3）And plugging plate（8）, in the tank body（6）Multiple second sacrificial anodes are installed on opposite side inwall
（9）, sleeve（4）Both ends extend through the dividing plate（3）And plugging plate（8）, sleeve（4）Back with water inlet line described in face（1）, and
In sleeve（4）With tank body（6）Between formed one closing annular space, multiple first sacrificial anodes（5）It is fixed in the annular space,
And in dividing plate（3）On be provided with multiple permeable holes connected with annular space（2）, in the sleeve（4）Close to plugging plate（8）One end outside
Multiple openings connected with annular space are provided with wall（7）；Also include being arranged on sleeve（4）Interior eddy flow valve（12）, the eddy flow
Valve（12）With the dividing plate（3）With one heart.
A kind of 2. anticorrosion structure for metallic conduit according to claim 1, it is characterised in that：The sleeve（4）'s
Internal diameter accounts for the tank body（6）The 1 of internal diameter 3 ~ 12.
A kind of 3. anticorrosion structure for metallic conduit according to claim 1, it is characterised in that：Described second sacrifices sun
Pole（9）Along tank body（6）Length radially is more than first sacrificial anode（5）Along tank body（6）Length radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722279.3A CN107779874A (en) | 2016-08-25 | 2016-08-25 | A kind of anticorrosion structure for metallic conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722279.3A CN107779874A (en) | 2016-08-25 | 2016-08-25 | A kind of anticorrosion structure for metallic conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107779874A true CN107779874A (en) | 2018-03-09 |
Family
ID=61389085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610722279.3A Withdrawn CN107779874A (en) | 2016-08-25 | 2016-08-25 | A kind of anticorrosion structure for metallic conduit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107779874A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304361A (en) * | 2018-03-27 | 2019-10-08 | 中国石油天然气股份有限公司 | Liquid container |
-
2016
- 2016-08-25 CN CN201610722279.3A patent/CN107779874A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304361A (en) * | 2018-03-27 | 2019-10-08 | 中国石油天然气股份有限公司 | Liquid container |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180309 |
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| WW01 | Invention patent application withdrawn after publication |