CN106929862A - A kind of telescopic auxiliary anode device of resistance to hypochlorous acid - Google Patents
A kind of telescopic auxiliary anode device of resistance to hypochlorous acid Download PDFInfo
- Publication number
- CN106929862A CN106929862A CN201710256992.8A CN201710256992A CN106929862A CN 106929862 A CN106929862 A CN 106929862A CN 201710256992 A CN201710256992 A CN 201710256992A CN 106929862 A CN106929862 A CN 106929862A
- Authority
- CN
- China
- Prior art keywords
- impressed current
- current anode
- anode rod
- seal casinghousing
- cable
- 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.)
- Granted
Links
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 27
- 239000004809 Teflon Substances 0.000 claims abstract description 12
- 229920006362 Teflon® Polymers 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000005060 rubber Substances 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 230000004308 accommodation Effects 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- ATLAQRSQSGOMOU-UHFFFAOYSA-N niobium platinum Chemical compound [Nb].[Pt] ATLAQRSQSGOMOU-UHFFFAOYSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 239000002775 capsule Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 238000004210 cathodic protection Methods 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
Classifications
-
- 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
- C23F13/16—Electrodes characterised by the combination of the structure and the material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to the telescopic auxiliary anode device of resistance to hypochlorous acid of one kind, it is characterised in that the auxiliary anode device includes impressed current anode rod arrying main body, impressed current anode rod, teflon sleeve and Waterproof connector of cable；First impressed current anode rod carries split and the second impressed current anode rod carries split and is fastened to form impressed current anode rod arrying main body, the second positive level of auxiliary carries split upper and lower part and stretches out the first seal casinghousing and the second seal casinghousing, first seal casinghousing is provided through the through hole for pasting fixed teflon sleeve, and Waterproof connector of cable is fixedly installed in the second seal casinghousing；Impressed current anode rod includes the first impressed current anode rod and the second impressed current anode rod, first impressed current anode rod is threadedly coupled the second impressed current anode rod, first impressed current anode rod is plugged in teflon sleeve, the extraction wire that the extraction wire of the second impressed current anode rod bottom passes through Waterproof connector of cable connection cable, the present invention can be used in ocean platform anticorrosion technique field.
Description
Technical field
The present invention relates to the telescopic auxiliary anode device of resistance to hypochlorous acid of one kind, belong to ocean platform anticorrosion technique neck
Domain.
Background technology
Impressed current cathodic protection method is one of method for commonly using in ocean platform anticorrosion technique field, impressed current anode
It is again the core component in impressed current cathodic protection system, the service behaviour of impressed current anode is to impressed current cathodic protection system
Operating efficiency there is decisive significance.In the middle of the process of impressed current protection, impressed current anode connection DC power anode, hair
Go out electric current, ocean platform surface is reached by seawater, platform is connected with DC power cathode occurs ocean platform overall structure
Cathodic polarization, so as to prevent integrally-built corrosion.When electric current passes through impressed current anode, can electrolytic seawater generation chlorine, secondary chlorine
Acid and hydrochloric acid, conventional auxiliary anode device and cable work long hours in this environment, will certainly cause outer power-up
Stream cathodic protection system failure, additionally, in ocean, due to the effect of stormy waves stream, be integrated in cathodic protection system with holding
Impressed current anode easily recurring structure destruction or seal failure on the cable of loading capability.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of telescopic resistance to good crushing resistance and sealing
Hypochlorous acid auxiliary anode device.
To achieve the above object, the present invention takes following technical scheme：A kind of telescopic impressed current anode of resistance to hypochlorous acid dress
Put, it is characterised in that the auxiliary anode device includes impressed current anode rod arrying main body, impressed current anode rod, teflon sleeve
And Waterproof connector of cable；The impressed current anode rod arrying main body includes that the first impressed current anode rod carries split and the second impressed current anode
Rod carries split, the first impressed current anode rod carries split and the second impressed current anode rod carry split be fastened to be formed for
Plug the annular accommodation space of cable, the positive level of the second auxiliary carries split upper and lower part and stretches out respectively the first sealing
Housing and the second seal casinghousing, first seal casinghousing are provided through for pasting the logical of fixed teflon sleeve
Hole, the Waterproof connector of cable is fixedly installed in second seal casinghousing；The impressed current anode rod includes longitudinally disposed the
One impressed current anode rod and the second impressed current anode rod, the first impressed current anode rod bottom are connected through a screw thread the second auxiliary sun
Pole rod top, the first impressed current anode rod is plugged in the teflon sleeve, the second impressed current anode rod bottom
Extraction wire pass through the extraction wire that the Waterproof connector of cable connects the cable.
Preferably, the second impressed current anode rod bottom is fixedly connected the second seal casinghousing top by flange.
Preferably, the auxiliary anode device also includes gasket seal and contact tube, the second impressed current anode rod bottom
Extraction wire connects the extraction wire of the cable by the gasket seal and contact tube through the Waterproof connector of cable.
Preferably, the contact tube uses copper pipe, and a copper billet, two or three EP rubbers are provided with the copper pipe and institute is accessed
Extraction wire is stated, the copper pipe cold pressing makes the extraction wire connect the impressed current anode rod, the copper pipe and extraction
Wire outside is arranged fixes a heat-shrink tube.
Preferably, first seal casinghousing and the second seal casinghousing side offer injecting hole, and the injecting hole is used
In by the first seal casinghousing and the second seal casinghousing described in the disposable mould filling of rubber.
Preferably, the impressed current anode rod arrying main body uses titanium metal material.
Preferably, the impressed current anode rod uses platinum-niobium anode stub.
Due to taking above technical scheme, it has advantages below to the present invention：1st, the second impressed current anode rod bottom of the invention
Extraction wire at colded pressing by gasket seal, contact tube, heat-shrink tube is arranged, five layers of Waterproof connector of cable and rubber filling are to close
Envelope property is ensured.2nd, the filled rubber in the first seal casinghousing of the invention and the second seal casinghousing is formed once to fill, and is
Integral structure, can be good at ensureing the watertightness of impressed current anode rod arrying main body, especially the extraction wire of cable and the
The watertightness of the extraction wire link position of two impressed current anode rod bottoms.3rd, impressed current anode rod arrying main body shell of the present invention is used
Titanium metal material, antiseptic effect of the titanium metal material in marine environment preferably, can strengthen impressed current anode rod arrying main body
Bulk strength, with good crushing resistance, impressed current anode rod is protected as load-carrying construction.4th, impressed current anode rod of the invention is logical
The two-part of threaded connection is crossed, can be stretched and be installed and be simple and convenient.5th, polytetrafluoro sleeve pipe of the invention has low temperature resistant, resistance to time
The advantages of chloric acid and lubrication high, impressed current anode rod can be made to slide wherein and be hardly damaged, can be widely applied to ocean and put down
In platform anticorrosion technique field.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural representation of impressed current anode rod arrying main body of the present invention；
Fig. 3 is the connection decomposing schematic representation of impressed current anode rod of the present invention.
Specific embodiment
Detailed description is carried out to the present invention below in conjunction with accompanying drawing.It should be appreciated, however, that accompanying drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.In the description of the invention, it is to be understood that
Term " first ", " second " etc. are only used for the purpose of description, and it is not intended that indicating or implying relative importance.
As shown in Figures 1 to 3, the telescopic auxiliary anode device of resistance to hypochlorous acid that the present invention is provided holds including impressed current anode rod
Main body 1, impressed current anode rod 2, teflon sleeve 3, gasket seal 4, contact tube 5 and Waterproof connector of cable 6 are carried, wherein, it is auxiliary
Helping anode stub arrying main body 1 includes that the first impressed current anode rod carries the impressed current anode rod of split 11 and second and carries split 12, second
The positive level of auxiliary carries the upper and lower part of split 12 and stretches out respectively the first seal casinghousing 13 and the second seal casinghousing 14, auxiliary sun
Pole rod 2 includes the first impressed current anode rod 21 and the second impressed current anode rod 22.
First impressed current anode rod carries the carrying split 12 of the impressed current anode rod of split 11 and second and is fastened to be formed for inserting
If the annular accommodation space of cable 7, the first impressed current anode rod 21 is connected through a screw thread the second impressed current anode rod 22 and constitutes auxiliary sun
Pole rod 2.First seal casinghousing 13 is provided through the through hole 15 for pasting fixed teflon sleeve 3, polytetrafluoroethylene (PTFE)
Sleeve pipe 3 is used to prevent corrosion of the hypochlorous acid to impressed current anode rod 2, and the first impressed current anode rod 21 is plugged in teflon sleeve 3
It is interior.Waterproof connector of cable 6 is fixedly installed in second seal casinghousing 14, the extraction wire of the bottom of the second impressed current anode rod 22 passes through ring
Shape gasket seal 4 and contact tube 5 through the connection cable 7 of Waterproof connector of cable 6 extraction wire.
In a preferred embodiment, impressed current anode rod arrying main body 1 can use titanium metal material.
In a preferred embodiment, the first seal casinghousing 13 and the side of the second seal casinghousing 14 offer injecting hole
16, injecting hole 16 is used in disposable mould filling the first seal casinghousing 13 of rubber and the second seal casinghousing 14.
In a preferred embodiment, the second impressed current anode rod 22 is provided with flange 23, and the second impressed current anode rod 22 leads to
Cross flange 23 and be fixedly connected the top of the second seal casinghousing 14.
In a preferred embodiment, impressed current anode rod 2 can use platinum-niobium anode stub.
In a preferred embodiment, contact tube 5 can use copper pipe, and a copper billet, two or three second third are provided with copper pipe
Rubber simultaneously accesses extraction wire, and copper pipe cold pressing makes extraction wire connect impressed current anode rod 2, copper pipe and extraction wire outside
It is arranged and fixes a heat-shrink tube.
Describe the installation of the telescopic auxiliary anode device of resistance to hypochlorous acid of the present invention in detail below by specific embodiment
Journey：
1) connecting contact tube 5 and contact tube 5 cold pressing the second impressed current anode rod 22 makes extraction wire auxiliary with second
Help the bottom of anode stub 22 to connect, the annular sealing gaskets 4 of gluing is fixedly installed in the second seal casinghousing 14.
2) bottom of the second impressed current anode rod 22 and contact tube 5 are inserted in the second seal casinghousing 14, flange 23 is inserted in
Two impressed current anode rods 22 simultaneously make the top of 23 and second seal casinghousing of flange 14 fixed by being coated with the screw of screw thread glue.
3) teflon sleeve 3 is pasted and fixed in through hole 15, and the first impressed current anode rod 21 is passed through into polytetrafluoro
Ethene sleeve pipe 3 is connected through a screw thread with the second impressed current anode rod 22.
3) the impressed current anode rod of split 11 and second is carried in the first impressed current anode rod to carry on the accommodation space of split 12
Gluing, is held in cable 7 the second impressed current anode rod and carries on the accommodation space of split 12, the extraction wire of cable 7 and second
The extraction wire of the bottom of impressed current anode rod 22 is connected by Waterproof connector of cable 6, and the first impressed current anode rod is carried into split 11
Split 12 is carried with the second impressed current anode rod to be fixed by bolt.
4) by injecting hole 16 by disposable mould filling the first seal casinghousing 13 of rubber and the second seal casinghousing 14.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
Can be what is be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded
Outside protection scope of the present invention.
Claims (7)
1. a kind of telescopic auxiliary anode device of resistance to hypochlorous acid, it is characterised in that the auxiliary anode device includes impressed current anode
Rod arrying main body, impressed current anode rod, teflon sleeve and Waterproof connector of cable；
The impressed current anode rod arrying main body includes that the first impressed current anode rod carries split and the second impressed current anode rod carries split,
The first impressed current anode rod carries split and the second impressed current anode rod carries split and is fastened to be formed for plugging cable
Annular accommodation space, the positive level of second auxiliary carries split upper and lower part and stretches out respectively the first seal casinghousing and second
Seal casinghousing, first seal casinghousing is provided through the through hole for pasting fixed teflon sleeve, described second
The Waterproof connector of cable is fixedly installed in seal casinghousing；
The impressed current anode rod includes longitudinally disposed the first impressed current anode rod and the second impressed current anode rod, the first auxiliary sun
Pole rod bottom is connected through a screw thread the second impressed current anode rod top, and the first impressed current anode rod is plugged in the polytetrafluoro
In ethene sleeve pipe, the extraction wire of the second impressed current anode rod bottom connects the cable by the Waterproof connector of cable
Extraction wire.
2. the telescopic auxiliary anode device of resistance to hypochlorous acid as claimed in claim 1 a kind of, it is characterised in that described second is auxiliary
Anode stub bottom is helped to be fixedly connected the second seal casinghousing top by flange.
3. the as claimed in claim 1 a kind of telescopic auxiliary anode device of resistance to hypochlorous acid, it is characterised in that the impressed current anode
Device also includes gasket seal and contact tube, the extraction wire of the second impressed current anode rod bottom by the gasket seal and
Contact tube connects the extraction wire of the cable through the Waterproof connector of cable.
4. the as claimed in claim 3 a kind of telescopic auxiliary anode device of resistance to hypochlorous acid, it is characterised in that the contact tube
Using copper pipe, a copper billet, two or three EP rubbers are provided with the copper pipe and the extraction wire is accessed, the copper pipe is carried out
Colding pressing makes the extraction wire connect the impressed current anode rod, and the copper pipe and extraction wire outside are arranged and fix a heat-shrink tube.
5. the telescopic auxiliary anode device of resistance to hypochlorous acid as claimed in claim 1 a kind of, it is characterised in that described first is close
Capsule body and the second seal casinghousing side offer injecting hole, and the injecting hole is used for described in the disposable mould filling of rubber
In first seal casinghousing and the second seal casinghousing.
6. a kind of telescopic auxiliary anode device of resistance to hypochlorous acid as described in any one of Claims 1 to 5, it is characterised in that
The impressed current anode rod arrying main body uses titanium metal material.
7. a kind of telescopic auxiliary anode device of resistance to hypochlorous acid as described in any one of Claims 1 to 5, it is characterised in that
The impressed current anode rod uses platinum-niobium anode stub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256992.8A CN106929862B (en) | 2017-04-19 | 2017-04-19 | A kind of telescopic auxiliary anode device of resistance to hypochlorous acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256992.8A CN106929862B (en) | 2017-04-19 | 2017-04-19 | A kind of telescopic auxiliary anode device of resistance to hypochlorous acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106929862A true CN106929862A (en) | 2017-07-07 |
| CN106929862B CN106929862B (en) | 2019-01-25 |
Family
ID=59437653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710256992.8A Active CN106929862B (en) | 2017-04-19 | 2017-04-19 | A kind of telescopic auxiliary anode device of resistance to hypochlorous acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106929862B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508609A (en) * | 2019-08-12 | 2019-11-29 | 浙江省有色金属地质勘查局 | A kind of heavy metal-polluted soil improvement anode construction and heavy metal-polluted soil processing unit |
| CN111826661A (en) * | 2020-08-31 | 2020-10-27 | 大连科迈尔防腐科技有限公司 | A high-current auxiliary anode structure for peripheral protection cover |
| CN112522712A (en) * | 2020-12-25 | 2021-03-19 | 中海油能源发展股份有限公司 | Jacket stretching type impressed current cable protection device |
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| CN2695451Y (en) * | 2003-12-18 | 2005-04-27 | 王锦林 | Auxiliary anode device used for electronic anticorrosion |
| CN1844454A (en) * | 2006-04-26 | 2006-10-11 | 中国船舶重工集团公司第七二五研究所 | Metal oxide anode assembly for cathode protection of ship |
| CN103060819A (en) * | 2012-12-24 | 2013-04-24 | 青岛钢研纳克检测防护技术有限公司 | Installing device of remote site type auxiliary anode |
| CN203625473U (en) * | 2013-11-19 | 2014-06-04 | 西安海镁特镁业有限公司 | Sacrificial anode structure for corrosion prevention of metal water box |
| CN104195566A (en) * | 2014-08-28 | 2014-12-10 | 中国海洋石油总公司 | Bracket packaging device for auxiliary anode |
| CN105386062A (en) * | 2015-12-16 | 2016-03-09 | 中国海洋石油总公司 | Protection cover of auxiliary anodes |
-
2017
- 2017-04-19 CN CN201710256992.8A patent/CN106929862B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695451Y (en) * | 2003-12-18 | 2005-04-27 | 王锦林 | Auxiliary anode device used for electronic anticorrosion |
| CN1844454A (en) * | 2006-04-26 | 2006-10-11 | 中国船舶重工集团公司第七二五研究所 | Metal oxide anode assembly for cathode protection of ship |
| CN103060819A (en) * | 2012-12-24 | 2013-04-24 | 青岛钢研纳克检测防护技术有限公司 | Installing device of remote site type auxiliary anode |
| CN203625473U (en) * | 2013-11-19 | 2014-06-04 | 西安海镁特镁业有限公司 | Sacrificial anode structure for corrosion prevention of metal water box |
| CN104195566A (en) * | 2014-08-28 | 2014-12-10 | 中国海洋石油总公司 | Bracket packaging device for auxiliary anode |
| CN105386062A (en) * | 2015-12-16 | 2016-03-09 | 中国海洋石油总公司 | Protection cover of auxiliary anodes |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508609A (en) * | 2019-08-12 | 2019-11-29 | 浙江省有色金属地质勘查局 | A kind of heavy metal-polluted soil improvement anode construction and heavy metal-polluted soil processing unit |
| CN111826661A (en) * | 2020-08-31 | 2020-10-27 | 大连科迈尔防腐科技有限公司 | A high-current auxiliary anode structure for peripheral protection cover |
| CN111826661B (en) * | 2020-08-31 | 2025-03-07 | 大连科迈尔海洋科技有限公司 | A high current auxiliary anode structure for an external protective cover |
| CN112522712A (en) * | 2020-12-25 | 2021-03-19 | 中海油能源发展股份有限公司 | Jacket stretching type impressed current cable protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106929862B (en) | 2019-01-25 |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC research institute limited liability company Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Research Institute |
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