CN205778747U - Oil field metallic conduit corrosion-preventing device - Google Patents
Oil field metallic conduit corrosion-preventing device Download PDFInfo
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- CN205778747U CN205778747U CN201620493227.9U CN201620493227U CN205778747U CN 205778747 U CN205778747 U CN 205778747U CN 201620493227 U CN201620493227 U CN 201620493227U CN 205778747 U CN205778747 U CN 205778747U
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- tank body
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- sacrificial anode
- water
- annular space
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Abstract
This utility model discloses oil field metallic conduit corrosion-preventing device, the tank body of ring flange and back with water inlet line and water injection pipe it is provided with in the middle part of including, tank body side inwall is arranged at intervals with dividing plate and plugging plate, 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, an annular space closed is formed between sleeve and tank body, multiple first sacrificial anodes are fixed in described annular space, dividing plate has multiple permeable hole connected with annular space, on one end outer wall of plugging plate, multiple opening connected with annular space is had at sleeve.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.
Description
Technical field
This utility model relates to petroleum pipeline corrosion-resistant field, specifically refers to oil field metallic conduit corrosion-preventing device.
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.
Utility model content
The purpose of this utility model is to provide oil field metallic conduit corrosion-preventing device, processing to improve in oil well while the corrosion-resistant degree of water injection pipe inwall to injecting water, reduces the production cost in water injection technology.
The purpose of this utility model is achieved through the following technical solutions:
Oil field metallic conduit corrosion-preventing device, the tank body of ring flange and the back with water inlet line being connected respectively and water injection pipe it is provided with tank body two ends in the middle part of including, 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；Also including the eddy flow valve being arranged in sleeve, described eddy flow valve is concentric with described dividing plate.
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.Wherein, the first sacrificial anode in primary treatment cavity consumes slower, and the second sacrificial anode in two stage treatment cavity consumes very fast, when sacrificial anode is replaced, the middle part of tank body is provided with ring flange, can facilitate and the second sacrificial anode is carried out quick-replaceable, to maintain in tank body the lasting process injecting water, and in sleeve, it is provided with eddy flow valve, avoiding enter into sleeve and on the premise of the injection water reflux of primary treatment, can be according to injecting discharge and the concrete condition of flow velocity, the circulation of water is injected in controlling tank body, prevent the second sacrificial anode load in two stage treatment cavity excessive, in the process injecting water thoroughly not being caused water injection pipe in avoiding tank body, corrosion occurs, the generation of the phenomenons such as fouling.
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.
This utility model compared with prior art, has such advantages as and beneficial effect:
1, this utility model 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, this utility model 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 this utility model 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 this utility model embodiment, constitutes the part of the application, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation；
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, 11-ring flange, 12-eddy flow valve.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, exemplary embodiment of the present utility model and explanation thereof are only used for explaining this utility model, are not intended as restriction of the present utility model.
Embodiment 1
As shown in Figure 1, the present embodiment includes that middle part is provided with the tank body 6 of ring flange 11 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；Also including the eddy flow valve 12 being arranged in sleeve 4, described eddy flow valve 12 is concentric with described dividing plate 3.
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.Wherein, the first sacrificial anode 5 in primary treatment cavity consumes slower, and the second sacrificial anode 9 in two stage treatment cavity consumes comparatively fast, when sacrificial anode is replaced, the middle part of tank body 6 is provided with ring flange 11, can facilitate and the second sacrificial anode 9 carried out quick-replaceable, to maintain the interior lasting process to injecting water of tank body 6, and in sleeve 4, it is provided with eddy flow valve 12, avoiding enter into sleeve 4 and on the premise of the injection water reflux of primary treatment, can be according to injecting discharge and the concrete condition of flow velocity, the circulation of water is injected in controlling tank body 4, prevent the second sacrificial anode 9 load in two stage treatment cavity excessive, in the process injecting water thoroughly not being caused water injection pipe 10 in avoiding tank body 6, corrosion occurs, the generation of the phenomenons such as fouling.
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 this utility model, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only detailed description of the invention of the present utility model; it is not used to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.
Claims (3)
- null1. oil field metallic conduit corrosion-preventing device，The tank body (6) of ring flange (11) and the back with water inlet line (1) being connected respectively and water injection pipe (10) it is provided with tank body (6) two ends in the middle part of including，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)；Also including the eddy flow valve (12) being arranged in sleeve (4), described eddy flow valve (12) is concentric with described dividing plate (3).
- Oil field the most according to claim 1 metallic conduit corrosion-preventing device, it is characterised in that: the internal diameter of described sleeve (4) account for described tank body (6) internal diameter 13 ~ 12.
- Oil field the most according to claim 1 metallic conduit corrosion-preventing device, 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 |
|---|---|---|---|
| CN201620493227.9U CN205778747U (en) | 2016-05-27 | 2016-05-27 | Oil field metallic conduit corrosion-preventing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620493227.9U CN205778747U (en) | 2016-05-27 | 2016-05-27 | Oil field metallic conduit corrosion-preventing device |
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| CN205778747U true CN205778747U (en) | 2016-12-07 |
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| CN201620493227.9U Active CN205778747U (en) | 2016-05-27 | 2016-05-27 | Oil field metallic conduit corrosion-preventing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
- 2016-05-27 CN CN201620493227.9U patent/CN205778747U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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