CN208685083U - The more coating composite plating equipment of tube inner wall - Google Patents
The more coating composite plating equipment of tube inner wall Download PDFInfo
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- CN208685083U CN208685083U CN201821247225.7U CN201821247225U CN208685083U CN 208685083 U CN208685083 U CN 208685083U CN 201821247225 U CN201821247225 U CN 201821247225U CN 208685083 U CN208685083 U CN 208685083U
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- oil pipe
- tube inner
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- coating
- wall
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Abstract
The utility model discloses a kind of more coating composite plating equipment of tube inner wall, comprising: liquid supply box is connected with one end of oil pipe, and working fluid can be injected in oil pipe by liquid supply box；Liquid-return box is connected with the other end of oil pipe, is expelled to liquid-return box by the working fluid of oil pipe；Circulating pump circulates working fluid in liquid supply box, oil pipe and liquid-return box；One or more rotating mechanisms drive oil pipe along axial-rotation；One or more oil pipe conductive mechanisms are electrically connected oil pipe；The two sides of oil pipe are arranged in anode conducting mechanism；And impressed current anode, it can coaxially be threaded through in oil pipe, the both ends of impressed current anode are electrically connected anode conducting mechanism.The utility model is using the impressed current anode and rotating mechanism being coaxially threaded through in oil pipe, and quality of coating is stable, thickness is uniform, tube inner wall can be repeatedly electroplated, and multilayer coating is formed, and anti-corrosion ability is strong.
Description
Technical field
The utility model relates to petroleum and mechanical engineering field of surface treatment, in particular to a kind of more coating of tube inner wall are multiple
Close electroplating device.
Background technique
The exploitation of oil product at present, conveying be unable to do without petroleum pipeline.Tube corrosion is a great problem for perplexing oilfield exploitation,
And inner wall corrosion is the main reason for causing structure ageing.The existing mode for solving the problems, such as this has the plastic coatings such as epoxies and change
Learn the processing modes such as nickel phosphor plating, tungsten alloy plating.
The plastic coatings such as epoxies, major defect be it is easy to fall off, influence to produce.In oil well, by high temperature, the environment of high pressure
With the influence of organic solvent, coating is easy to aging, binding force declines and falls off, and easily causes the blocking of downhole tool, and it is raw to influence oil well
It produces and even increases operating risk.
Sealing technique for plating oil pipe by nickel phosphorus exists in the prior art, by oil pipe after pickling, using the side of nickel phosphor plating
Formula.Nickel phosphor plating mainly uses chemical plating process, and the workpiece soaking of chemical plating in the solution, therefore enters the plating liquid of tube inner wall
The problems such as small, poor fluidity of product, causes the gas generated that can not be discharged, and coating is mostly thin with thickness there are leak source.It is actually using
When, inner wall corrosion is far longer than outer wall corrosion, and causes to fail.
In addition, the multifarious requirement of corrosive medium that single erosion resistant coating is unable to satisfy in the different blocks of oil field.For example,
The electrochemical corrosion of high salinity is primarily present in water injection well；High temperature corrosion is primarily present in steamed well；Carbon dioxide injection
There are oxygen corrosion in well；There are hydrogen sulfide corrosions etc. for gas recovery well.
Therefore, needing one kind can be for different corrosive medium, and the tube inner wall for carrying out flexible operating using different coating is anti-
Rotten mode.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
One of the purpose of this utility model is, solves the problems, such as plastic coating temperature tolerance difference and caducous；This is practical new
Type another object is, further solves that chemical plating coating is single, flow of the electrolyte is poor, quality of coating caused by waste liquid outlet etc.
Unstable and environmental problem；The utility model a further object is, improves the corrosion resistant flexibility of coating and specific aim, Neng Gougen
Different coating for protection against corrosion schemes is designed according to the different corrosive mediums in block.
It is according to the present utility model in a first aspect, the utility model provides one to realize said one or multiple purposes
The kind more coating composite plating equipment of tube inner wall, comprising: liquid supply box is connected with one end of oil pipe, and working fluid can lead to
It crosses in liquid supply box injection oil pipe；Liquid-return box is connected with the other end of oil pipe, is expelled to back liquid by the working fluid of oil pipe
Case；Circulating pump circulates working fluid in liquid supply box, oil pipe and liquid-return box；One or more rotating mechanisms,
Drive oil pipe along axial-rotation；One or more oil pipe conductive mechanisms are electrically connected oil pipe；Anode conducting mechanism, setting
In the two sides of oil pipe；And impressed current anode, it can coaxially be threaded through in oil pipe, the both ends of impressed current anode are electrically connected anode and lead
Motor structure.
Further, in above-mentioned technical proposal, impressed current anode is insoluble anode.
Further, in above-mentioned technical proposal, the length of impressed current anode is 12 meters.
Further, in above-mentioned technical proposal, one or more rotating mechanisms be evenly provided on liquid supply box and liquid-return box it
Between oil pipe on；One or more oil pipe conductive mechanisms are evenly provided on the oil pipe between liquid supply box and liquid-return box.
Further, in above-mentioned technical proposal, the quantity of rotating mechanism is identical as the quantity of oil pipe conductive mechanism.
Further, in above-mentioned technical proposal, further include working fluid monitoring device, be used for the temperature of monitoring fluid
Degree, pH value and level value.
Further, in above-mentioned technical proposal, working fluid is water, pickling solution, degreasing fluid, nickel plating bath, copper electrolyte, the conjunction of nickel phosphorus
Golden plating solution or nickel tungsten plating solution.
Second aspect according to the present utility model, the utility model provide a kind of more coating composite plating sides of tube inner wall
The more coating composite plating equipment of tube inner wall of method, application any one of such as above-mentioned technical proposal realize that this method includes
Following steps: cleaning tubing inner wall；Impressed current anode is coaxially mounted in oil pipe；It cleans again；And tube inner wall is carried out
Repeatedly plating forms multilayer coating.
Further, in above-mentioned technical proposal, the step of cleaning tubing inner wall successively includes: high temperature oil removing, derusting process, stream
Dynamic oil removing, flowing washing, flowacid- cleaning, flowing washing and flowing neutralize；The step of cleaning again is flowing washing.
Further, in above-mentioned technical proposal, the temperature of high temperature oil removing is 250~500 DEG C；Derusting process use pressure for
Quartz sand is blown by the air-flow of 0.5~1MPa by one end of oil pipe, and the duration is 2~4min, then from the other end of oil pipe into
The identical operation of row；Flowing oil removing is to inject degreasing fluid in oil pipe, and oil pipe rotates 5~10min under rotating mechanism driving；Stream
Dynamic washing is injected water into oil pipe, and oil pipe rotates 2~4min under rotating mechanism driving；Flowacid- cleaning is to inject pickling solution
In oil pipe, oil pipe rotates 10~20min under rotating mechanism driving；And it is to inject alkaline solution in oil pipe that flowing, which neutralizes,
Oil pipe rotates 2~6min under rotating mechanism driving.
Further, in above-mentioned technical proposal, the step of tube inner wall is repeatedly electroplated includes: nickel plating, is plated using nickel
Liquid, main salt 250~300mg/L of content, the pH value 4.0~5.0 of nickel plating, 50~60 DEG C of temperature；Copper facing, using copper electrolyte, main salt
200~300mg/L of content, 20~30 DEG C of copper-plated temperature；Plating nickel-phosphorus alloy, using nickel-phosphorus alloy plating solution, main salt content 350~
450mg/L, the pH value 1.9~2.7 of plating nickel-phosphorus alloy, 50~65 DEG C of temperature；And/or plating nickel tungsten, using plating nickel tungsten,
Main salt 250~300mg/L of content, plates the pH value 4.0~5.0 of nickel tungsten, and 50~55 DEG C of temperature.
Further, in above-mentioned technical proposal, tube inner wall is carried out that the multilayer coating being formed by repeatedly is electroplated to be nickel-
Copper-nickel layer, nickel-ni-p alloy coating or nickel-nickel tungsten layer.
Further, in above-mentioned technical proposal, the plating solution that the step of tube inner wall is repeatedly electroplated uses is sulfate
Plating solution.
Further, after the step of in above-mentioned technical proposal, being repeatedly electroplated to tube inner wall, forming multilayer coating,
It further comprises the steps of: and takes out impressed current anode from oil pipe；And heat treatment dehydrogenation is carried out to oil pipe.
Compared with prior art, the utility model has the following beneficial effects:
1. the equipment of the utility model, using the impressed current anode and rotating mechanism being coaxially threaded through in oil pipe, quality of coating is steady
Calmly, thickness is uniform, and tube inner wall is repeatedly electroplated as needed, forms multilayer coating, and anti-corrosion ability is strong；
2. plating solution can be recycled, environmental problem is reduced；
3. different coating for protection against corrosion combinations can be designed according to corrosive medium different in each region, it is resistance to improve coating
The flexibility of corrosion, it is applied widely；
4. the pretreatment and cleaning of pair tube inner wall can be improved the binding force of coating；
5. the part pretreatment process of tube inner wall can also be realized using the equipment of the utility model, it is easy to use.
Above description is only the general introduction of technical solutions of the utility model, in order to more clearly understand the utility model
Technological means can be simultaneously practiced according to the content of specification, while above and other purpose, skill in order to make the utility model
Art feature and advantage are more understandable, are exemplified below one or more preferred embodiments, and be described in detail with the accompanying drawings as follows.
Detailed description of the invention
Fig. 1 is the schematic diagram of the more coating composite plating equipment of tube inner wall of an embodiment according to the present utility model.
Main appended drawing reference explanation:
1- oil pipe, 2- liquid supply box, 3- liquid-return box, 4- rotating mechanism, 5- oil pipe conductive mechanism, 6- anode conducting mechanism, 7-
Impressed current anode.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Explicitly indicate that, otherwise in entire disclosure and claims, term " includes " or its change unless otherwise other
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other yuan
Part or other components.
Herein, for convenience of description, spatially relative term can be used, such as " following ", " lower section ", "lower",
" above ", " top ", "upper" etc., to describe an elements or features and the relationship of another elements or features in the accompanying drawings.Ying Li
Solution, spatially relative term are intended to comprising the not Tongfang of object in use or operation other than direction painted in figure
To.For example, the element for being described as be in other elements or feature " lower section " or "lower" will if the object in figure is reversed
Orientation is in " top " of elements or features.Therefore, exemplary term " lower section " may include following above and both direction.Object
There can also be other orientations (be rotated by 90 ° or other are orientated) and reply spatially relative term used herein makes corresponding solution
It releases.
Herein, term " first ", " second " etc. be distinguishing two different elements or position, be not to
Limit specific position or relativeness.In other words, in some embodiments, term " first ", " second " etc. can also be each other
It exchanges.
As shown in connection with fig. 1, compound according to the more coating of tube inner wall of the utility model one or more specific embodiment
Electroplating device, including liquid supply box 2, liquid-return box 3, rotating mechanism 4, oil pipe conductive mechanism 5, anode conducting mechanism 6 and impressed current anode
7.The both ends of inner wall oil pipe 1 to be electroplated are connected with liquid supply box 2 and liquid-return box 3 respectively, and working fluid is injected oil by liquid supply box 2
Pipe 1, working fluid are expelled to liquid-return box 3 by oil pipe 1, make working fluid in liquid supply box by circulating pump (not shown)
2, it is circulated in oil pipe 1 and liquid-return box 3.The n rotating mechanism 4 of intermediate connection and oil pipe conductive mechanism 5 of oil pipe 1, wherein n >=
1.Rotating mechanism 4 can drive oil pipe 1 to be electrically connected along axial-rotation, oil pipe conductive mechanism 5 and oil pipe 1.It is preferred that rather than limiting
Property, rotating mechanism 4 and oil pipe conductive mechanism 5 are uniformly arranged on the oil pipe 1 between liquid supply box 2 and liquid-return box 3, rotating mechanism
4 quantity is identical with the quantity of oil pipe conductive mechanism 5, in embodiment as shown in Figure 1, rotating mechanism 4 and oil pipe conduction machine
There are two structure 5 is each, the utility model is not limited thereto.The more coating composite plating equipment of the tube inner wall of the utility model use
Impressed current anode 7, in use, impressed current anode 7 coaxially penetrates in oil pipe 1, the both ends of impressed current anode 7 are electrically connected anode conducting mechanism
6, the two sides of oil pipe 1 are arranged in anode conducting mechanism 6.
Illustratively, the more coating composite plating equipment of the tube inner wall of the utility model can be used for tube inner wall scavenger
Sequence, for example, flowing washing, flowing oil removing, flowacid- cleaning, flowing neutralization etc..In these processes, water, degreasing fluid, pickling solution or alkali
Property solution is as working fluid.
Illustratively, when being electroplated using the more coating composite plating equipment of the tube inner wall of the utility model, according to institute
The type of coating is needed, working fluid can be nickel plating bath, copper electrolyte, nickel-phosphorus alloy plating solution or nickel tungsten plating solution.
Further, in one or more illustrative embodiments of the utility model, impressed current anode 7 is insoluble sun
Pole.The dimensionally stable of insoluble anode, so that it is guaranteed that thickness of coating is uniform.The shape and size of impressed current anode 7 are interior with oil pipe 1
Wall matches, and illustratively, the length of impressed current anode 7 is up to 12 meters.
Further, in one or more illustrative embodiments of the utility model, the more coating of tube inner wall are compound
Electroplating device further includes working fluid monitoring device (not shown), is used for the temperature, pH value and liquid of monitoring fluid
Place value etc..
The electro-plating method using the more coating composite plating equipment of above-mentioned tube inner wall is specifically described below, which can
To include the following steps:
(a) cleaning tubing inner wall.
(b) impressed current anode is coaxially mounted in oil pipe.
(c) it cleans again.
(d) tube inner wall is repeatedly electroplated, forms multilayer coating.
It is preferred that and not restrictive, in one or more illustrative embodiments of the utility model, step (a) cleaning
Tube inner wall successively includes: that high temperature oil removing, derusting, flowing oil removing, flowing washing, flowacid- cleaning, flowing washing and flowing neutralize.
Oil pipe is after upper shackle, and oil pipe thread and tube inner wall are stained with the greasy dirts such as a large amount of dope, antirust oil, it is therefore desirable to high temperature
Oil removing.High temperature oil removing is to handle oil pipe at high temperature, carbonizes greasy dirt, to improve the binding ability of coating.Illustratively, high
Warm oil removing is completed in heat-treatment furnace, and operating temperature is 250~500 DEG C, and certain the utility model is not limited thereto.Oil pipe warp
After crossing high temperature oil removing, there are still the dirt of greasy dirt charing, oxide skin, floating rust on tube inner wall, it is therefore desirable to processing of rust removing.Specifically
Ground, processing of rust removing are to be blown quartz sand by one end port of oil pipe by quartz sand storage tank using the air-flow with certain pressure intensity
It is swept into tube inner wall, illustratively, the purging duration is 2~4min, then carries out identical behaviour from the other end port of oil pipe
Make, to uniformly remove the dirt of the greasy dirt charing on tube inner wall, oxide skin, floating rust.It is preferred that and not restrictive, air-flow
Pressure is 0.5~1MPa.After the process that derusts, tube inner wall can form grease with air reaction, need to carry out flowing oil removing
Processing.Flowing oil removing is by injecting degreasing fluid in oil pipe, oil pipe can reach through rotating mechanism drives edge axial-rotation
Except the purpose of grease.Illustratively, rotational time is 5~10min.The process purpose of flowing washing is all to wash with water together
The residue of process.Illustratively, it injects water into oil pipe, is driven through rotating mechanism, oil pipe is along axial-rotation, rotational time
2~4min.Flowacid- cleaning be in order to remove deep layer present in oil pipe corrosion, by by acidic mixed solution inject oil pipe in,
It is driven through rotating mechanism, oil pipe can reach the purpose of removal deep layer corrosion along axial-rotation.Illustratively, rotational time is
10~20min.It is to be neutralized the tube inner wall environment after flowacid- cleaning that flowing, which neutralizes, prevents the generation for returning rust.
Illustratively, alkaline mixed solution is injected in oil pipe, is driven through rotating mechanism, oil pipe along axial-rotation, rotational time is 2~
6min.It should be understood that different pretreatment process can be selected for different coating, to meet the attachment of different coating
Condition, improves the binding force of plating interlayer, and the utility model is not limited thereto.In existing technology, the preceding place of tube inner wall
There is no high temperature oil removing process in reason mode, and the process that derusts mostly uses wind sand or shot, so that subsequent coating binding ability
It is insufficient.
Further, in one or more illustrative embodiments of the utility model, the cleaning again of step (c) is
Refer to flowing washing, illustratively, injects water into oil pipe, driven through rotating mechanism, oil pipe is along axial-rotation, rotational time 2
~4min.
Further, in one or more illustrative embodiments of the utility model, step (d) to tube inner wall into
The more coating composite platings of row using multi-layer plating by the way of, in the case where one layer of coating surface of guarantee does not form passivating film into
The plating of next layer of row, to form multilayer coating.On the one hand multi-layer plating can reduce porosity, be on the other hand capable of forming
Potential difference first forms homogeneous corrosion to surface layer to form lateral encroaching trend, protects oil pipe substrate.Multi-layer plating it is each
Layer is different, can be different according to the corrosive medium of different application scene, and multilayer coating needed for determining is constituted, for example, salinity is high
Well nickel-copper-nickel coating can be used；Nickel-nickel-phosphorus alloy coating can be used in hydrogen sulfide well；Electric pump well can be used nickel-nickel tungsten and close
Gold plate.Meanwhile each layer in multilayer coating can also play the characteristic of single coating, solve erosion corrosion etc. and ask
Topic.For example, being directed to hydrogen sulfide well, the last layer i.e. superficial layer are ni-p alloy coating in multilayer coating, it is corrosion-resistant can
Prevent destruction of the hydrogen sulfide to coating, and then Global Macros other anticorrosion effects of multilayer coating.
Preferably, the utility model is equipped with a variety of plating solutions, and plating solution preferably uses inert metal plating solution, different plating solutions mutually group
Required multilayer coating can be obtained by closing use.Example and not restrictive, one or more embodiments of the utility model
In, electroplating reaction condition needed for the type of plating solution and corresponding coating is as follows, and wherein current density can be 1~3A/dm2:
Nickel plating bath, main salt 250~300mg/L of content form the reaction condition of nickel coating: pH value 4.0~5.0, temperature 50
~60 DEG C.
Copper electrolyte, main salt 200~300mg/L of content form the reaction condition of copper coating: 20~30 DEG C of temperature.
Nickel-phosphorus alloy plating solution, main salt 350~450mg/L of content form the reaction condition of nickel-phosphorus coating: pH value 1.9~
2.7,50~65 DEG C of temperature.
Nickel tungsten plating solution, main salt 250~300mg/L of content form the reaction condition of nickel tungsten plating: pH value 4.0~
5.0,50~55 DEG C of temperature.
Further, in one or more illustrative embodiments of the utility model, step (d) to tube inner wall into
The more coating composite platings of row further include real time monitoring plating solution, the substance lost in electroplating process is replenished in time, so that it is guaranteed that electric
Plate the realization of reaction.It wherein, mainly include temperature, pH value, liquid level etc. to the real time monitoring of plating solution.Preferably, the time of monitoring
Between be divided into 2~3 hours.
In one or more embodiments of the utility model, plating solution is recycled, periodically to plating solution at
Reason, for example, by activated carbon adsorption, organic matter secondary filter, concentration adjustment etc., to guarantee the purity of plating solution.
In one or more embodiments of the utility model, it is insoluble anode for impressed current anode, changes plating solution
System, and change plating solution addition system, make various metals layer plating solution can with insoluble anode as impressed current anode,
To realize more coating composite platings.For example, nickel plating bath does not include the nickel chloride in conventional baths, the main function of nickel chloride is to increase
Add the dissolution of anode.
It further,, will after completing more coating composite platings in one or more embodiments of the utility model
Impressed current anode takes out from oil pipe, cleaning tubing, and carries out heat treatment dehydrogenation to oil pipe, prevents hydrogen embrittlement from influencing.
The obtained product of the device and method of the utility model is multilayer metal compound coating, solves plastics painting first
The resistance to mild caducous problem of layer；Secondly it being plated in stable electroplating technology Successful utilization to long tube, and is recycled using environment-friendly type
It is unstable to solve quality caused by single chemical plating coating, solution poor fluidity, waste liquid outlet etc. for plating solution and the mode being repeatedly electroplated
Fixed and environmental problem；Multi-layer plating technique is used again, and different anti-corrosion platings can be designed according to the different corrosive mediums in block
Layered scheme.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.For above-mentioned example embodiment made it is any it is simple modification,
Equivalent variations and modification, should all fall into the protection scope of the utility model.
Claims (7)
1. a kind of more coating composite plating equipment of tube inner wall characterized by comprising
Liquid supply box is connected with one end of oil pipe, and working fluid can be injected in the oil pipe by the liquid supply box；
Liquid-return box is connected with the other end of oil pipe, is expelled to the liquid-return box by the working fluid of the oil pipe；
Circulating pump circulates working fluid in the liquid supply box, the oil pipe and the liquid-return box；
One or more rotating mechanisms drive the oil pipe along axial-rotation；
One or more oil pipe conductive mechanisms are electrically connected the oil pipe；
The two sides of the oil pipe are arranged in anode conducting mechanism；And
Impressed current anode can be coaxially threaded through in the oil pipe, and the both ends of the impressed current anode are electrically connected the anode and lead
Motor structure.
2. the more coating composite plating equipment of tube inner wall according to claim 1, which is characterized in that the impressed current anode is
Insoluble anode.
3. the more coating composite plating equipment of tube inner wall according to claim 1, which is characterized in that the impressed current anode
Length is 12 meters.
4. the more coating composite plating equipment of tube inner wall according to claim 1, which is characterized in that one or more of
Rotating mechanism is evenly provided on the oil pipe between the liquid supply box and the liquid-return box；One or more of oil pipes
Conductive mechanism is evenly provided on the oil pipe between the liquid supply box and the liquid-return box.
5. the more coating composite plating equipment of tube inner wall according to claim 4, which is characterized in that the rotating mechanism
Quantity is identical as the quantity of the oil pipe conductive mechanism.
6. the more coating composite plating equipment of tube inner wall according to claim 1, which is characterized in that further include working fluid
Monitoring device is used to monitor the temperature, pH value and level value of the working fluid.
7. the more coating composite plating equipment of tube inner wall according to claim 1, which is characterized in that the working fluid is
Water, pickling solution, degreasing fluid, nickel plating bath, copper electrolyte, nickel-phosphorus alloy plating solution or nickel tungsten plating solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821247225.7U CN208685083U (en) | 2018-08-03 | 2018-08-03 | The more coating composite plating equipment of tube inner wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821247225.7U CN208685083U (en) | 2018-08-03 | 2018-08-03 | The more coating composite plating equipment of tube inner wall |
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| CN208685083U true CN208685083U (en) | 2019-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624927A (en) * | 2018-08-03 | 2018-10-09 | 克拉玛依双信防腐技术有限公司 | The more coating composite plating equipment of tube inner wall and electro-plating method |
-
2018
- 2018-08-03 CN CN201821247225.7U patent/CN208685083U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624927A (en) * | 2018-08-03 | 2018-10-09 | 克拉玛依双信防腐技术有限公司 | The more coating composite plating equipment of tube inner wall and electro-plating method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Jianchun Inventor after: Mao Tiancong Inventor after: Tang Bin Inventor after: Luo Xin Inventor after: Cheng Juan Inventor after: Liu Dalu Inventor before: Wang Jianchun Inventor before: Mao Tiancong Inventor before: Tang Bing Inventor before: Luo Xin Inventor before: Cheng Juan Inventor before: Liu Dalu |
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| CP03 | Change of name, title or address | ||
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Address after: 806 Pingnan 1st Road, Baijiantan District, Karamay, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Defeng Yisheng petroleum Anticorrosion Engineering Co., Ltd Address before: 834000 the Xinjiang Uygur Autonomous Region Karamay City, the New South Road, No. 2, f Patentee before: KARAMAY SHUANGXIN ANTI-CORROSION TECHNOLOGY Co.,Ltd. |