Tensioned ICCP System for Offshore Oil Platforms
System Overview
Tensioned Impressed Current Cathodic Protection Systemtensioned anode impressed current cathodic protection system
This is a novel impressed-current cathodic protection system designed for both new and in-service jacket platform foundations. It integrates the auxiliary anodes and reference electrodes of the cathodic protection system into a composite cable reinforced with load-bearing steel wire ropes, and employs a tensioning device to achieve integrated installation of the cable–electrode assembly on the jacket foundation. The resulting structure is safe and reliable, capable of withstanding storm surge events that occur once in a century. The power supply equipment is configured with a multi-channel cathodic protection power controller, where each power module is uniquely paired with an auxiliary anode to enable distributed, independent control, thereby allowing fine-tuned adjustment of the auxiliary anode current output. This system is particularly well suited for jacket platforms with complex structural configurations and represents the only viable solution for extending the service life of deepwater jacket cathodic protection systems.
▎Cathodic Protection and Monitoring Technologies and Equipment for Offshore Structures
▎System Composition of Tension-Type Impressed-Current Cathodic Protection
01
Distributed Intelligent Power System
02
Composite Cable-Electrode System
03
Intelligent Remote Measurement and Control System
04
Composite Cable Tensioning System
05
Cathodic Protection Numerical Simulation and Evaluation System
Basic Principle
◆ Cathodic protection is a type of electrochemical protection that works by applying an external current to the surface of a corroding metallic structure, thereby making the protected structure the cathode. This suppresses the electron transfer responsible for metal corrosion, effectively preventing or mitigating corrosion.
◆ Cathodic protection is classified into two methods: impressed-current cathodic protection and sacrificial-anode cathodic protection.
Product Specifications
▎Composite Cable Parameters
▎Composite Cable Parameters
Product Features
▎The tensioned ICCP system offers the following significant technical advantages:
◆ Reasonable layout: the composite cable (i.e., the anode string) is installed on the inner side of the jacket structure, with individual auxiliary anodes arranged at different water depths along the jacket. The positions and quantities of the auxiliary anodes on the composite cable are determined using cathodic protection numerical simulation software, ensuring uniform protection coverage across the jacket surface and eliminating both overprotection and underprotection. Moreover, since the cable is installed on the inner side of the jacket, there is no risk of abrasion from fishing nets or other similar hazards.
◆ Fine-grained control: Based on numerical simulations, the anodes are distributed relatively uniformly along the inner surface of the jacket structure, with each anode equipped with a dedicated power supply module that allows independent adjustment of its protection current. This enables fine-grained control of cathodic protection across different zones of the jacket, while also allowing coordinated and integrated adjustment among anodes to ensure uniform potential distribution and maximize the utilization efficiency of the cathodic protection current.
◆ Tensioned Integrated Installation of Composite Cable–Electrode Systems: Multiple sets of auxiliary anodes are integrated into the composite cable, which features high-strength steel wire ropes and a multi-layer water-blocking structure. This design enables integrated, distributed installation that is simple, cost-effective, and quick to deploy, significantly reducing the need for underwater operations. Furthermore, by conducting motion-response and stress-simulation analyses of the composite cable under century-peak sea conditions, an appropriate tension force is applied to the cable to suppress its lateral sway, thereby substantially enhancing its reliability and durability.
◆ Long-term pressure-resistant encapsulation technology: Key underwater components, including composite cables, auxiliary anodes, and reference electrodes, are all manufactured using long-lasting waterproof and pressure-resistant processes, enabling reliable operation under a water pressure of 5 MPa for extended service life.
◆ Replaceable: All installation can be completed during the onshore construction phase of the jacket, with the cable being deployed offshore concurrently as the jacket is positioned; thanks to the composite cable tensioning arrangement, any damaged sections can be retrieved and replaced.
Numerical Simulation-Based Optimization Design and Validation
Composite tensioning installation structure for easy installation.
Cathodic Protection Data Management Platform for Monitoring and Prediction
Distributed Multi-Channel Control Power Supply Unit
Removable and replaceable in the later stage, with minimal underwater operations.
Full-Life-Cycle Operations and Maintenance Management and Technical Support
Application Performance
KOMAIL is the only domestic manufacturer capable of providing tensioned ICCP solutions and complete systems for offshore oil jacket platforms, and it is also the sole domestic supplier with proven successful in-service applications of tensioned ICCP on jacket platforms.Its first set of tensioned ICCP system was successfully deployed on the Lufeng 13-2WHP platform and has been in operation since May 2017. Despite withstanding several super typhoons, the system has demonstrated stable performance and effective jacket protection.
It has currently been deployed in engineering projects such as the Lufeng 13-2 WHP platform (water depth of 132 meters), the Wenchang 13-1 WHPA and Wenchang 13-2 WHPA platforms (water depth of 117 meters), and the Panyu 30-1 DPP platform (water depth of 200 meters).
▎Lufeng 13-2WHP Platform
▎Wenchang 13-1 and 13-2 WHPA Platforms
▎Panyu 30-1 DPP Platform
▎Kengli 6-1 WHPI/WHPH Platform
▎Bozhong Kenli Onshore Power Platform
▎Kengli 6-1 WHPF Platform
Application Performance
| Type | Project | Number of platforms | Water depth | Platform Name | Status |
| Create New Platform | Lingshui 25-1 | 1 | 88.3 meters | YC13-1 PAP | Design |
| Create New Platform | Bozhong 19-6 Phase I | 4 | 20~30m | BZ19-6 CEPA/WHPB/WHPC/WHPM | Construction |
| Create New Platform | Bozhong 29-6 | 2 | 20~30m | BZ29-6 WHPA/WHPB | Construction |
| Create New Platform | Kengli 6-1 | 3 | 20~30m | KL6-1 WHPH/WHPI/PAP | Stable operation and good protection |
| Create New Platform | Kengli 6-1 | seven | 20~30m | KL6-1 CEP/WHPB/C/D/E/F/G | Construction |
| Create New Platform | Bozhong–Kenli Shore Power | 4 | 20~30m | BZ34-1 EPP, BZ19-6 EPP, BZ35-2 EPP, KL10-1 EPP | Construction |
| Create New Platform | Liu Hua 11-1 | 1 | 20~30m | LH11-1 DPP | Design |
| Create New Platform | Jinzhou 23-2 | 2 | 20~30m | JZ23-2 CEPA/CEPB | Design |
| Create New Platform | Bozhong 34-9 | 1 | 20~30m | BZ34-9 WHPC | Design |
| Create New Platform | Chengbei CEPC | 1 | 20~30m | North Cheng CEPC | Design |
| Create New Platform | Phase II Development of the Luda 5-2 North Oilfield | 2 | 20~30m | LD5-2N WHPB/PAP | Design |
| Create New Platform | Bozhong 28-2S | 1 | 20~30m | BZ 28-2S-CEPC | Construction |
| Create New Platform | Lüda Suizhong Project | 4 | 20~30m | LD5-2 CEPC, SZ36-1 CEPQ, SZ36-1 WHPR, SZ36-1 WHPS | Design |
| Create New Platform | Bozhong 19-6 | 1 | 20~30m | BZ19-6 WHPD | Design |
| Create New Platform | Penglai 19-3 Oilfield, Blocks 5 and 10 | 2 | 20~30m | PL19-3 WHPH/WHPN | Construction |
| Life Extension of In-Service Platforms | Lufeng 13-2 | 1 | 132 meters | LF13-2 WHP | Stable operation since June 2017 |
| Life Extension of In-Service Platforms | Wenchang 13-1 | 1 | 117 meters | WC13-1 WHPA | Stable operation since May 2021 |
| Life Extension of In-Service Platforms | Wenchang 13-2 | 1 | 117 meters | WC13-2 WHPA | Stable operation since May 2021 |
| Life Extension of In-Service Platforms | Panyu 30-1 | 1 | 200m | PY30-1 DPP | Put into operation in August 2022 |
| Total | Forty |
Contact Information
Address: Company Headquarters:Building A, Overseas Students’ Entrepreneurship Park, No. 1 Huoju Road, High-tech Industrial Park, Dalian
Experiment–Manufacturing Base: Tangli Industrial Park, Hongqi Subdistrict, Ganjingzi District, Dalian City
Telephone: Corporate Headquarters: 0411-84660668
Experiment-Manufacturing Base: 0411-82646110
Email: info@kingmile.com
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