CN103014722B - Device for installing impressed current cathodic protection system on offshore platform - Google Patents
Device for installing impressed current cathodic protection system on offshore platform Download PDFInfo
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- CN103014722B CN103014722B CN201210548610.6A CN201210548610A CN103014722B CN 103014722 B CN103014722 B CN 103014722B CN 201210548610 A CN201210548610 A CN 201210548610A CN 103014722 B CN103014722 B CN 103014722B
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Abstract
The invention discloses a device for installing an impressed current cathodic protection system on an offshore platform. The device comprises a steel protective tube and a cable, wherein the cable is arranged inside the steel protective tube, one end of the cable extends outside the top of the steel protective tube, both the top and the bottom of the steel protective tube are arranged in a sealing way, a plurality of auxiliary anodes are arranged on the steel protective tube, the auxiliary anodes are connected with the cable, and a plurality of platform rod members are arranged on the steel protective tube, and connected with the platform to be installed. The device solves the problem that the service life of the existing commonly-used sacrificial anode can not meet the requirement for prolonging the service life of the offshore oil platform, and reduces the workload of modifying the cathodic protection system for prolonging the service life of the oil platform. The device can be widely applied to corrosion protection of iron and steel materials which are immersed in sea water.
Description
Technical field
The present invention relates to a kind of erecting device, be specifically related to a kind of erecting device of offshore oil platform impressed current cathodic protection system.
Background technology
In marine petroleum exploitation, most offshore oil platform adopts ferrous materials, and seawater has very strong corrodibility to iron and steel.In order to protect iron and steel not to be corroded, must apply galvanic protection, conventional method comprises impressed current and sacrificial anode, and current sacrificial anode is widely used, and sacrificial anode is aluminum base alloy.The a large amount of non-ferrous metal of sacrificial anode consumption, sacrificial anode not only increases platform weight, also increases platform moving load, thus increases Platform Steel amount; In addition, sacrificial anode runs out of and just loses provide protection, if platform needs to continue to use, need to install new cathodic protection system, cost is very high.Impressed current method is powered by platform power source, and supplementary anode installed by platform, and supplementary anode does not consume substantially; environmentally friendly, long service life, can according to platform actual demand regulation output voltage and outward current; if platform increases other structures, do not need to newly increase cathodic protection system.The installation method of impressed current device is the important content of cathodic protection system application; to impressed current protected effect and global reliability extremely important; although impressed current has great advantage in technology and economy; there is no good installation method all the time, limit the application at sea oil platform.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of erecting device of offshore platform impressed current cathodic protection system.
The erecting device of a kind of offshore platform impressed current cathodic protection system provided by the present invention, comprises steel pillar and cable; Described cable is located in described steel pillar, and one end of described cable is stretched out from the top of described steel pillar; The top of described steel pillar and bottom are sealing and arrange;
Described steel pillar is provided with several supplementary anodes, and described auxiliary cathode is connected with described cable;
Described steel pillar is provided with several platform rod members, and described platform rod member can be connected with platform to be installed.
In above-mentioned erecting device, described supplementary anode is connected with described steel pillar by supplementary anode strut member.
In above-mentioned erecting device, described platform rod member is connected with described steel pillar by pillar strut member.
In above-mentioned erecting device, described pillar strut member and described steel pillar and platform rod member all can be and are welded and fixed.
In above-mentioned erecting device, described pillar strut member is provided with isolated flange.
In above-mentioned erecting device, described steel pillar is provided with several sacrificial anodes, for protecting steel pillar further.
In above-mentioned erecting device, the top of described steel pillar is sealed by thermal shrinkable sleeve;
The bottom of described steel pillar is sealed by steel pillar plug.
In above-mentioned erecting device, the outside surface of described steel pillar, pillar strut member, isolated flange, supplementary anode strut member and steel pillar plug is coated with insulation layer, this insulation layer takes any one material in chloroprene rubber, polyolefine, epoxy and polyureas, and its thickness is not less than 2mm; The insulation layer of described isolated flange is also coated with pyrocondensation belt.
The present invention is owing to taking above technical scheme, and it has the following advantages:
1, the present invention has installed some supplementary anodes due at sea oil platform; all rod members of structure formation complexity on offshore oil platform are made all to obtain effective cathodic polarization; impressed current method can be adopted to implement galvanic protection to offshore oil platform, realize the object of the invention.
2, the present invention is owing to have employed steel pillar, protects cable from damage, and steel pillar is provided with isolated flange, ensure that steel pillar and platform impressed current system electrical isolation, the overprotection of galvanic protection can not occur.Steel pillar is arranged on platform by pillar strut member, makes supplementary anode and platform rod member maintain certain distance, ensure that the supplementary anode adopting quantity as far as possible few, and the protection potential of platform is in suitable scope.
3, the invention solves conventional sacrificial anode now and can not meet the requirement of offshore oil platform prolongs life work-ing life, reduce the workload of oil platform prolongs life transformation cathodic protection system.The present invention can be widely used in the corrosion prevention of the ferrous materials immersed in seawater.
Accompanying drawing explanation
Fig. 1 is the front view of erecting device of the present invention.
Fig. 2 is the side-view of Fig. 1.
Fig. 3 is the schematic diagram at the steel pillar top of erecting device of the present invention.
Fig. 4 is the schematic diagram bottom the steel pillar of erecting device of the present invention.
In figure, each mark is as follows: 1 continuous-current plant, 2 cables, 3 steel pillars, 4 supplementary anodes, 5 platform rod members, 6 pillar strut members, 7 isolated flanges, 8 sacrificial anodes, 9 supplementary anode strut members, 10 thermal shrinkable sleeves, 11 steel pillar plugs.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but the present invention is not limited to following examples.
As depicted in figs. 1 and 2, the erecting device of offshore platform impressed current cathodic protection system provided by the invention comprises a steel pillar 3 and cable 2; This cable 2 penetrates in steel pillar 3, and one end of this cable 2 is stretched out from the top of steel pillar 3, is connected with the continuous-current plant 1 be placed on platform deck; As shown in Figure 3, the top of this steel pillar 3 adopts high density polyethylene(HDPE) thermal shrinkable sleeve 10 to carry out encapsulation process, and as shown in Figure 4, the bottom welding steel pillar plug 11 of this steel pillar 3 carries out encapsulation process; This steel pillar 3 is provided with in multiple supplementary anode 4(figure and only illustrates 4), set supplementary anode 4 is connected with steel pillar 3 by supplementary anode strut member 9, and this supplementary anode 4 is connected with cable 2; This steel pillar 3 is connected with 3 platform rod members 5 by pillar strut member 6, and this pillar strut member 6 all adopts the mode of welding to be connected with steel pillar 3 and platform rod member 5, and the platform rod member 5 of setting is connected for ocean platform to be installed; Each pillar strut member 6 is provided with an isolated flange 7, the outside surface of this isolated flange 7 applies by insulation layer, and it can adopt any one material in chloroprene rubber, polyolefine, epoxy and polyureas, coated by pyrocondensation belt in its insulation layer Shanghai; Steel pillar 3 also has additional 3 sacrificial anodes 8, for the protection of steel pillar 3.In this erecting device, the outside surface of steel pillar 3, pillar strut member 6, supplementary anode strut member 9 and steel pillar plug 11 is also coated with insulation layer, and its thickness can control at more than 2mm as the case may be.
The erecting device of offshore platform impressed current cathodic protection system of the present invention, can install according to following process:
1) first on several platform rod members 5, several pillar strut members 6 are welded, steel pillar 3 adopts isolated flange 7 to be arranged on each pillar strut member 6, the bottom welding steel pillar plug 11 of steel pillar 3 carries out encapsulation process, steel pillar 3 welds several supplementary anode strut members 9, every two supplementary anode strut members 9 install a supplementary anode 4;
2) several sacrificial anodes 8 of welded and installed on steel pillar 3;
3) cable 2 penetrates in steel pillar 3, and one end of cable 2 is stretched out from the top of steel pillar 3, is connected with the continuous-current plant 1 be placed on platform deck, and the other end of cable 2 penetrates pillar strut member 6 and is connected with supplementary anode 4;
4) top of steel pillar 3 adopts high density polyethylene(HDPE) thermal shrinkable sleeve 10 to carry out encapsulation process;
During work, unlatching continuous-current plant 1 can realize the protection to platform.
Claims (1)
1. an erecting device for offshore platform impressed current cathodic protection system, is characterized in that:
Described erecting device comprises steel pillar and cable; Described cable is located in described steel pillar, and one end of described cable is stretched out from the top of described steel pillar; The top of described steel pillar and bottom are sealing and arrange;
Described steel pillar is provided with several supplementary anodes, and described auxiliary cathode is connected with described cable;
Described supplementary anode is connected with described steel pillar by supplementary anode strut member;
Described steel pillar is provided with several sacrificial anodes;
The top of described steel pillar is sealed by thermal shrinkable sleeve;
The bottom of described steel pillar is sealed by steel pillar plug;
Described steel pillar is provided with several platform rod members, and described platform rod member can be connected with platform to be installed;
Described platform rod member is connected with described steel pillar by pillar strut member;
Described pillar strut member and described steel pillar and platform rod member are and are welded and fixed;
Described pillar strut member is provided with isolated flange;
The outside surface of described steel pillar, pillar strut member, isolated flange, supplementary anode strut member and steel pillar plug is coated with insulation layer;
The insulation layer of described isolated flange is also coated with pyrocondensation belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548610.6A CN103014722B (en) | 2012-12-17 | 2012-12-17 | Device for installing impressed current cathodic protection system on offshore platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548610.6A CN103014722B (en) | 2012-12-17 | 2012-12-17 | Device for installing impressed current cathodic protection system on offshore platform |
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| Publication Number | Publication Date |
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| CN103014722A CN103014722A (en) | 2013-04-03 |
| CN103014722B true CN103014722B (en) | 2015-07-22 |
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| CN201210548610.6A Active CN103014722B (en) | 2012-12-17 | 2012-12-17 | Device for installing impressed current cathodic protection system on offshore platform |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108118343A (en) * | 2018-01-17 | 2018-06-05 | 青岛钢研纳克检测防护技术有限公司 | The impressed current of jacket platform and sacrificial anode Combined Protection device and method |
| CN108411308B (en) * | 2018-03-30 | 2020-01-03 | 东北电力大学 | Buried pipeline cathode protection device and method |
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| US4544465A (en) * | 1983-10-26 | 1985-10-01 | Union Oil Company Of California | Galvanic anodes for submergible ferrous metal structures |
| USH544H (en) * | 1982-05-21 | 1988-11-01 | The Dow Chemical Company | Impressed current cathodic protection system employing cobalt spinel structured anode |
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| US4176033A (en) * | 1978-04-10 | 1979-11-27 | Exxon Production Research Company | Anode clamp assembly and method of installation |
| US4196064A (en) * | 1978-11-06 | 1980-04-01 | Conoco, Inc. | Marine fouling control |
| US4251343A (en) * | 1979-10-05 | 1981-02-17 | Conoco, Inc. | Sacrificial anode apparatus |
| US4318787A (en) * | 1980-02-22 | 1982-03-09 | Conoco Inc. | Sacrificial anode composition in cathodic protection process |
| USH544H (en) * | 1982-05-21 | 1988-11-01 | The Dow Chemical Company | Impressed current cathodic protection system employing cobalt spinel structured anode |
| US4544465A (en) * | 1983-10-26 | 1985-10-01 | Union Oil Company Of California | Galvanic anodes for submergible ferrous metal structures |
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| CN103014722A (en) | 2013-04-03 |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |