CN105840142A - Corrosion preventing device for inner pipe wall of water injection pipe - Google Patents
Corrosion preventing device for inner pipe wall of water injection pipe Download PDFInfo
- Publication number
- CN105840142A CN105840142A CN201610358949.8A CN201610358949A CN105840142A CN 105840142 A CN105840142 A CN 105840142A CN 201610358949 A CN201610358949 A CN 201610358949A CN 105840142 A CN105840142 A CN 105840142A
- Authority
- CN
- China
- Prior art keywords
- tank body
- water
- sleeve
- annular space
- water injection
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- 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
Abstract
The invention discloses a corrosion preventing device for an inner pipe wall of a water injection pipe. The corrosion preventing device comprises a tank body as well asandas well as a water inlet pipeline and a water injection pipe, wherein a partition plate and a plugging plate are arranged on the inner wall of one side of the tank body at intervals, and a plurality of second sacrificial anodes are arranged on the inner wall of the other side of the tank body; the two ends of a sleeve respectively penetrate through the partition plate and the plugging plate, and the sleeve directly faces the water inlet pipeline; a closed annular space is formed between the sleeve and the tank body, and the a plurality of first sacrificial anodes are fixed in the annular space; a plurality of water drainage holes communicated with the annular space are formed in the partition plate, and a plurality of circulating holes communicated with the annular space are formed in the outer wall, near one end of the plugging plate, of the sleeve. The injected water is subjected to stage treatment, pre-corrosion prevention is carried out in a primary treatment cavity, and a main corrosion prevention is carried out in a secondary treatment cavity, so that the work load of the sacrificial anodes in the tank body is greatly reduced, the frequent replacement of the sacrificial anodes in the tank body due to a rapid consumption is avoided, and the production cost of the water injection working procedure in the oil production process is reduced.
Description
Technical field
The present invention relates to petroleum pipeline corrosion-resistant field, specifically refer to water injection pipe inner tubal wall anti-corrosive apparatus.
Background technology
At present, the etching problem of oil field pipe mainly embodies a concentrated expression of on the production facility in waterflood-transmission line, hot backwater, steam tracing pipeline, High water cut petroleum pipeline and the oil field such as tanks portion, sewage disposal device.But it is as the prolongation of development time; formation pressure declines; elastic exploitation can not meet the requirement of exploitation; for equilibrium oil stressor layer; and also to protection environment; after needing to process the separation water of production fluid, re-injection is to oil reservoir; re-injection process needs the production fluid separation water after the process of substantial amounts of pipelined, and owing to production fluid separation water constituent is complicated, bacterial reproduction is serious; it is also accompanied by fouling in addition to corrosivity is very strong; the pipeline inwall of conveying can be produced serious corrosion, in addition, manage defeated pressure higher; general at about 10MPa, high reaches
30-40MPa, corrosion easily causes pipeline cracking and perforation, and sewage leaks outside, and on the one hand causes large-area water injection well to stop note, affects completing of injection allocation amount.
nullThe method that the interior anticorrosion of process defeated to line pipe and the control of underdeposit corrosion are taked at present is and adds corrosion inhibiter and corrosion inhibiting and descaling agent，But the complexity due to pumped (conveying) medium composition，Manage the polytropy of defeated technique，The corrosion of pipeline can not be effectively controlled，The particularly underdeposit corrosion of pipeline cannot reach to control purpose by adding corrosion inhibiter and corrosion inhibiting and descaling agent with spot corrosion perforation，Pipeline corrosion and corrosion failure、Perforation the most frequently occurs，Production to oil field causes huge economic loss，And SACRIFICIAL ANODE CATHODIC PROTECTION can effectively control production fluid separation water and the return water corrosion to pipeline inwall，But owing to pipeline internal diameter is little，Sacrificial anode cannot be inserted，And in the injecting process，Loss to sacrificial anode is bigger，During the injection water that particularly in water injection well, filling and subsoil water compatibility differ greatly，Need sacrificial anode is frequently changed，Exacerbate the cost of winning of oil well.
Summary of the invention
It is an object of the invention to provide water injection pipe inner tubal wall anti-corrosive apparatus, processing to improve in oil well while the corrosion-resistant degree of water injection pipe inwall to injecting water, reduce the production cost in water injection technology.
The purpose of the present invention is achieved through the following technical solutions:
Water injection pipe inner tubal wall anti-corrosive apparatus, the back with water inlet line including tank body and being connected with tank body two ends respectively and water injection pipe, described tank body side inwall is arranged at intervals with dividing plate and plugging plate, described tank body opposite side inwall is provided with multiple second sacrificial anode, the two ends of sleeve extend through described dividing plate and plugging plate, sleeve is just to described back with water inlet line, and between sleeve and tank body, form an annular space closed, multiple first sacrificial anodes are fixed in described annular space, and on dividing plate, have multiple permeable hole connected with annular space, on one end outer wall of plugging plate, multiple opening connected with annular space is had at described sleeve.
For the huge consumption in water injection technology of the sacrificial anode in prior art, inventor is through the improvement to external sacrificial anode, by to the two stages for the treatment of injecting water, while reducing sacrificial anode extent of deterioration, improve the process rank injecting water, and then realize the pre-front anticorrosion to water injection pipe, reduce corrosion and corrosion failure, the perforation probability of waterflood-transmission line.During use, injecting water and flow in tank body by back with water inlet line, tank interior space is separated into two parts by its median septum and plugging plate, i.e. injects primary treatment cavity and the two stage treatment cavity of water；Enter the injection water in tank body after the shunting of dividing plate and sleeve, it is divided into two-way to circulate in tank body, the first via injects water by annular space after entering after permeable hole, i.e. enter in primary treatment cavity, by with the first sacrificial anode generation chemical reaction after, entered in sleeve by opening again, second tunnel is injected water and is then entered directly in two stage treatment cavity by sleeve, the first injection water after primary treatment enters in two stage treatment cavity with sleeve equally simultaneously, eventually pass with the second sacrificial anode generation chemical reaction after, it is discharged in water injection pipe；Injection water after twice process circulates at water injection pipe, and be substantially reduced with the probability of the tube wall generation chemical reaction of metal material, i.e. reducing the probability that chemical attack occurs on water injection pipe inwall so that in the water injection technology of oil well, the service life of water injection pipe is greatly improved.And the process injecting water is being used staged care, pre-anticorrosion is carried out in primary treatment cavity, and in two stage treatment cavity, carry out main anticorrosion, the workload making the sacrificial anode in tank body is substantially reduced, the sacrificial anode in tank body is avoided to occur quickly consuming and frequently changing, the production cost in water filling operation during reduction oil exploitation.
The internal diameter of described sleeve account for described tank body internal diameter 13 ~ 12.In tank body, the process injecting water is divided into two parts, it is auxiliary with primary treatment cavity, two stage treatment cavity is main, and the aperture of permeable hole and opening is less in processing process chambers, the injection discharge i.e. processed in primary treatment cavity is relatively small, and major part enters into the injection water in tank body in sleeve flows into two stage treatment cavity, the internal diameter of sleeve is set to described tank body internal diameter 13 ~ 12, i.e. ensure in sleeve, injection water and the injection water without any process after primary treatment enter in two stage treatment cavity in proper proportions, the second sacrificial anode is made to realize the while of injecting preservative treatment efficiency maximized of water, reduce the consumption of the second sacrificial anode, ensure that the second sacrificial anode in tank body realizes optimal consumption and income ratio.
Described second sacrificial anode along tank body length radially more than described first sacrificial anode along tank body length radially.The layout of the first sacrificial anode is limited by the annular space space between sleeve and inner tank wall, simultaneously to flow through primary treatment cavity bigger with the injection discharge difference in two stage treatment cavity, therefore, the core of the second sacrificial anode is arranged on the position closer to tank body axis, make the second sacrificial anode more abundant with contacting of injection water, to realize the treatment effeciency maximization of the second sacrificial anode.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention is using staged care to the process injecting water, pre-anticorrosion is carried out in primary treatment cavity, and in two stage treatment cavity, carry out main anticorrosion, the workload making the sacrificial anode in tank body is substantially reduced, the sacrificial anode in tank body is avoided to occur quickly consuming and frequently changing, the production cost in water filling operation during reduction oil exploitation；
2, the present invention is in sleeve, injection water and the injection water without any process after primary treatment enter in two stage treatment cavity in proper proportions, the second sacrificial anode is made to realize the while of injecting preservative treatment efficiency maximized of water, reduce the consumption of the second sacrificial anode, it is ensured that the second sacrificial anode in tank body realizes optimal consumption and income ratio；
3, the core of the second sacrificial anode is arranged on the position closer to tank body axis by the present invention so that the second sacrificial anode is more abundant with contacting of injection water, to realize the treatment effeciency maximization of the second sacrificial anode.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Labelling and corresponding parts title in accompanying drawing:
1-back with water inlet line, 2-permeable hole, 3-dividing plate, 4-sleeve, 5-the first sacrificial anode, 6-tank body, 7-opening, 8-plugging plate, 9-the second sacrificial anode, 10-water injection pipe.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment includes tank body 6 and the back with water inlet line 1 being connected respectively and water injection pipe 10 with tank body 6 two ends, described tank body 6 side inwall is arranged at intervals with dividing plate 3 and plugging plate 8, described tank body 6 opposite side inwall is provided with multiple second sacrificial anode 9, the two ends of sleeve 4 extend through described dividing plate 3 and plugging plate 8, sleeve 4 is just to described back with water inlet line 1, and between sleeve 4 and tank body 6, form an annular space closed, multiple first sacrificial anodes 5 are fixed in described annular space, and on dividing plate 3, have multiple permeable hole 2 connected with annular space, on one end outer wall of plugging plate 8, multiple opening 7 connected with annular space is had at described sleeve 4.
For the huge consumption in water injection technology of the sacrificial anode in prior art, inventor is through the improvement to external sacrificial anode, by to the two stages for the treatment of injecting water, while reducing sacrificial anode extent of deterioration, improve the process rank injecting water, and then realize the pre-front anticorrosion to water injection pipe 10, reduce corrosion and corrosion failure, the perforation probability of water injection pipe 10 line.During use, injecting water and flow in tank body 6 by back with water inlet line 1, tank body 6 inner space is separated into two parts with plugging plate 8 by its median septum 3, i.e. injects primary treatment cavity and the two stage treatment cavity of water；Enter the injection water in tank body 6 after the shunting of dividing plate 3 and sleeve 4, it is divided into two-way to circulate in tank body 6, the first via injects water by annular space after entering after permeable hole 2, i.e. enter in primary treatment cavity, after there is chemical reaction with the first sacrificial anode 5, entered in sleeve 4 by opening 7 again, second tunnel is injected water and is then entered directly in two stage treatment cavity by sleeve 4, the first injection water after primary treatment enters in two stage treatment cavity with sleeve 4 equally simultaneously, eventually pass after there is chemical reaction with the second sacrificial anode 9, it is discharged in water injection pipe 10；Injection water after twice process circulates at water injection pipe 10, and be substantially reduced with the probability of the tube wall generation chemical reaction of metal material, i.e. reducing the probability that chemical attack occurs on water injection pipe 10 inwall so that in the water injection technology of oil well, the service life of water injection pipe 10 is greatly improved.And the process injecting water is being used staged care, pre-anticorrosion is carried out in primary treatment cavity, and in two stage treatment cavity, carry out main anticorrosion, the workload making the sacrificial anode in tank body 6 is substantially reduced, the sacrificial anode in tank body 6 is avoided to occur quickly consuming and frequently changing, the production cost in water filling operation during reduction oil exploitation.
As preferably, the internal diameter of described sleeve 4 account for described tank body 6 internal diameter 13 ~ 12.In tank body 6, the process injecting water is divided into two parts, it is auxiliary with primary treatment cavity, two stage treatment cavity is main, and the aperture of permeable hole 2 and opening 7 is less in processing process chambers, the injection discharge i.e. processed in primary treatment cavity is relatively small, and major part enters into the injection water in tank body 6 in sleeve 4 flows into two stage treatment cavity, the internal diameter of sleeve 4 is set to described tank body 6 internal diameter 13 ~ 12, i.e. ensure in sleeve 4, injection water and the injection water without any process after primary treatment enter in two stage treatment cavity in proper proportions, the second sacrificial anode 9 is made to realize the while of injecting preservative treatment efficiency maximized of water, reduce the consumption of the second sacrificial anode 9, ensure that the second sacrificial anode 9 in tank body 6 realizes optimal consumption and income ratio.
Wherein, the second sacrificial anode 9 in the present embodiment along tank body 6 length radially more than described first sacrificial anode 5 along tank body 6 length radially.The layout of the first sacrificial anode 5 is limited by the annular space space between sleeve 4 and tank body 6 inwall, simultaneously to flow through primary treatment cavity bigger with the injection discharge difference in two stage treatment cavity, therefore, the core of the second sacrificial anode 9 is arranged on the position closer to tank body 6 axis, make the second sacrificial anode 9 more abundant with contacting of injection water, to realize the treatment effeciency maximization of the second sacrificial anode 9.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (3)
- null1. water injection pipe inner tubal wall anti-corrosive apparatus，The back with water inlet line (1) including tank body (6) and being connected with tank body (6) two ends respectively and water injection pipe (10)，It is characterized in that: on the inwall of described tank body (6) side, be arranged at intervals with dividing plate (3) and plugging plate (8)，Described tank body (6) opposite side inwall is provided with multiple second sacrificial anode (9)，The two ends of sleeve (4) extend through described dividing plate (3) and plugging plate (8)，Sleeve (4) is just to described back with water inlet line (1)，And between sleeve (4) and tank body (6), form an annular space closed，Multiple first sacrificial anodes (5) are fixed in described annular space，And on dividing plate (3), have multiple permeable hole (2) connected with annular space，On one end outer wall of plugging plate (8), multiple opening (7) connected with annular space is had at described sleeve (4).
- Water injection pipe inner tubal wall anti-corrosive apparatus the most according to claim 1, it is characterised in that: the internal diameter of described sleeve (4) account for described tank body (6) internal diameter 13 ~ 12.
- Water injection pipe inner tubal wall anti-corrosive apparatus the most according to claim 1, it is characterised in that: described second sacrificial anode (9) along tank body (6) length radially more than described first sacrificial anode (5) along tank body (6) length radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610358949.8A CN105840142A (en) | 2016-05-27 | 2016-05-27 | Corrosion preventing device for inner pipe wall of water injection pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610358949.8A CN105840142A (en) | 2016-05-27 | 2016-05-27 | Corrosion preventing device for inner pipe wall of water injection pipe |
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| Publication Number | Publication Date |
|---|---|
| CN105840142A true CN105840142A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610358949.8A Pending CN105840142A (en) | 2016-05-27 | 2016-05-27 | Corrosion preventing device for inner pipe wall of water injection pipe |
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| CN (1) | CN105840142A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110615507A (en) * | 2019-10-31 | 2019-12-27 | 章明歅 | Circulating cooling water treatment equipment and circulating cooling water treatment method |
| CN111101135A (en) * | 2020-02-24 | 2020-05-05 | 西安石油大学 | Truss type double-cylinder horizontal metering separator sacrificial anode protection device |
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| US7857949B2 (en) * | 2008-01-29 | 2010-12-28 | Bernard Closset | Sacrificial anode with resistor assembly for metal tank corrosion protection |
| CN202810697U (en) * | 2012-10-25 | 2013-03-20 | 大庆开发区东油新技术有限公司 | Downhole pipeline anti-corrosion bracelet type positive pole |
| CN104911604A (en) * | 2015-06-11 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Oil-field water injection pipeline inner wall anticorrosion device and replacement method |
| CN105840143A (en) * | 2016-05-27 | 2016-08-10 | 成都北方石油勘探开发技术有限公司 | Corrosion preventing device used for inner pipe wall of water filling pipe |
| CN105840144A (en) * | 2016-05-27 | 2016-08-10 | 成都北方石油勘探开发技术有限公司 | Anti-corrosive structure for metal pipeline |
| CN205778748U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | Anticorrosion structure for water injection pipe inner tubal wall |
-
2016
- 2016-05-27 CN CN201610358949.8A patent/CN105840142A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7857949B2 (en) * | 2008-01-29 | 2010-12-28 | Bernard Closset | Sacrificial anode with resistor assembly for metal tank corrosion protection |
| CN202810697U (en) * | 2012-10-25 | 2013-03-20 | 大庆开发区东油新技术有限公司 | Downhole pipeline anti-corrosion bracelet type positive pole |
| CN104911604A (en) * | 2015-06-11 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Oil-field water injection pipeline inner wall anticorrosion device and replacement method |
| CN105840143A (en) * | 2016-05-27 | 2016-08-10 | 成都北方石油勘探开发技术有限公司 | Corrosion preventing device used for inner pipe wall of water filling pipe |
| CN105840144A (en) * | 2016-05-27 | 2016-08-10 | 成都北方石油勘探开发技术有限公司 | Anti-corrosive structure for metal pipeline |
| CN205778748U (en) * | 2016-05-27 | 2016-12-07 | 成都北方石油勘探开发技术有限公司 | Anticorrosion structure for water injection pipe inner tubal wall |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110615507A (en) * | 2019-10-31 | 2019-12-27 | 章明歅 | Circulating cooling water treatment equipment and circulating cooling water treatment method |
| CN111101135A (en) * | 2020-02-24 | 2020-05-05 | 西安石油大学 | Truss type double-cylinder horizontal metering separator sacrificial anode protection device |
| CN111101135B (en) * | 2020-02-24 | 2021-08-10 | 西安石油大学 | Truss type double-cylinder horizontal metering separator sacrificial anode protection device |
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Application publication date: 20160810 |