Cathodic protection design
Cathodic protection design for new and aging offshore and marine assets

Cathodic-protection design services and third party review from NACE certified engineers
In addition to new designs according to NACE, ISO and DNV standards for traditional assets, Deepwater specializes in complex subsea equipment and designing retrofit anode systems for aging assets in need of life extension.



CP design for life extension
CP design codes for new assets

Subsea pipelines
Anode system design for new pipelines also is strictly governed by industry-accepted design codes DNV RP-F103, ISO 15589-2 and NACE SP0169-2007

For subsea equipment
For subsea production equipment or anything else in deep water, the existing standards are modified by the following: NACE 7L192

Tank internals
For CP Systems installed inside tanks and process vessels, the following standards are used: API 561

Platforms and floaters
New platforms, TLPs and floating production are all designed to one of the established design codes: DNV-RP-B401, NACE SP0176-2007 and ISO 19906
Project experience

Kitchen Lights
Project Case Study: ICCP anode system for a new platform in Alaska
- New Fixed Jacket
- Cook Inlet, Alaska
- Impressed current

PanYu 30-1
Project Case Study: ICCP anode retrofit for eight-leg structure in the South China Sea
- Water depth: 200 m
- Fixed monitoring

Forties Field Platforms
Project Case Study: Nine Retrobuoy systems installed to protect four aging North Sea structures.
- 4 FIXED PLATFORMS
- 9 x 450 AMP SLEDS
- INSTALL: 12 HOURS EACH
- 20 YEAR DESIGN LIFE

Green Canyon
Project Case Study: Anode sleds installed at Neptune and Shenzi fields
- Water depth: 4,400 ft
- Install time: 3 days

Arnold / Oyster Fields
Project Case Study: Anode retrofit on two deep water subsea fields in the Gulf of Mexico
- Installation: ROV
- Install time: 72 hours
- Depth: 775 ft / 1,750 ft

Joliet TLP
Project Case Study: Anode retrofit for the foundation template of a TLWP in Green Canyon
- Water depth: 1,760 ft
- 19 x RetroPods

Chinook Field PLET
Project Case Study: Deepwater designs a mini-gateway retrofit in the Gulf of Mexico
- Continuity jumper
- Borrowed CP from PLET
- Custom design
- 2 week turnaround

Lufeng 13-2
Project Case Study: Two Retrobuoy systems for a fixed platform in the South China Sea
- Platform installed 2005
- Premature anode failure
- Depth: 430 ft
- Supplemental ICCP Anodes

Offshore Drill Stack
Project Case Study: CP levels monitored and corrected
- Recap Datalogger
- CP & Coating Remediation

Zafiro Producer
Project Case Study: Impressed Current cathodic protection of FPSO Hull
- Water depth: 590 ft
- Dynamic cable
- 800 Amps CP

Brent Pipeline
Project Case Study: Pipeline anode retrofit with matresses
- 12 km pipeline
- Conctrete Weight Coat
- 15 year life extension

Garden Banks 191 A
Project Case Study: ICCP anode sleds retrofit on a GOM fixed platform
- Water depth: 720 ft
- Installation: ROV
- INstall time: 2 days

Cook Inlet Pier
Project Case Study: Deepwater designs and installs new impressed current pile anode in Alaska.
- 1,800 AMPS of CP
- Freeze / Thaw resistant

Dock Cathodic Protection
Anodes systems for Docks, Jetties and Piers

Offshore Wind Farm
Project Case Study: ICCP anode sled to supplement failing anodes on 33 wind turbines
- FIELD: 33 TRIPOD TURBINES
- INSTALL: < 24 HRS / TURBINE

TAQA North Cormorant
Impressed Current Cathodic Protection (ICCP) Retrofit on the North Cormorant Platform
- Fixed Platforms
- INSTALLATION: ROV
- INSTALL TIME: 18 hrs

Tapis-F & Irong Barat B
Project Case Study: anodes replaced on two Malaysian platforms
- Fixed Platforms
- INSTALLATION: ROV
- INSTALL TIME: 63 hrs

Leman Alpha
Project Case Study: ICCP anode sled to supplement failing anodes on three structures
- INSTALL: 12 HOURS PER BUOY
- DEPTH: 35 M
- 25 YEAR DESIGN LIFE

Neptune Spar
Project Case Study: ICCP anode sled to supplement failing anodes on the hull
- INSTALL TIME: 72 HOURS
- DEPTH: 1,930 FT
- 15 YEAR DESIGN LIFE

Dudgeon OWF
Project Case Study: Remote Cathodic Protection Monitoring System Installed in the North Sea
- 4 Offshore Turbines
- 32 km Offshore

Tabu, Guntong, Semangkok
Project Case Study: anodes replaced during pipeline survey campaign
- 3 PIPELINES
- INSTALLATION: ROV
- INSTALL TIME: 4 DAYS

Frying Pan Tower
Project Case Study: Offshore Bed and Breakfast platform anode retrofit
- Civilian owned
- 12 Retrolinks

Olympus Field PBGs
Project Case Study: Self-monitored anode sled protects 24 new PGBS at 3000 ft for 45 years.
- INSTALLATION: ROV
- INSTALL TIME: 30 HOURS
- BATTERY-FREE MONITORING
- 45 YEAR DESIGN LIFE

GOM Structures
Project Case Study: Cathodic protection retrofit on five structures in fourteen days
- 5 fixed jackets
- Install time: 14 days
- 210' four point boat

Forties field flowlines
Project Case Study: Anode retrofit for the in-field flowlines in the North Sea
- INSTALL TIME: 60 HOURS
- Depth: 106 m

Bahamas Loading Dock
Project Case Study: Failing dock anodes replaces with topside anode strings
- Sacrificial Anodes
- Diverless install

Alba Field
Project Case Study: Anode replacement on a pipeline in EG
- INSTALLATION: ROV
- DEPTH: 200 FT
- Sacrificial anode sled

California wave park survey
Project Case Study: California Wave Park Corrosion Survey
- CVI/NDT Inspection Done
- 500,000 Sq. Ft. + Facility
- 55+ Assets Inspected
- ICCP Retrofit Recommended

Arklow Bank
Project Case Study: ICCP anode system for wind farms in the Irish Sea
- 7 x Wind Turbines
- Water depth: 10 m
- Offshore time: 11 days

Houston Ship Channel Dock
Project Case Study: Houston Ship Channel Retrofit
- 5 Docks Protected
- Installation: Divers
- 47 RetroLinks Installed
- 16 ICCP Anodes Installed

South Pass 62-C
Project Case Study: Two RetroBuoy systems replace spent anodes on a 330 ft platform in the Gulf of Mexico
- INSTALL TIME: 30 HOURS
- DEPTH: 330 ft
- 20 YEAR DESIGN LIFE

LAF-1 & 2 Platforms
Project Case Study: Single float Retrobuoy systems installed in the Gulf of Guinea.
- INSTALLATION: ROV
- IMPRESSED CURRENT ANODES

Liverpool Bay OSI
Project Case Study: Hanging ICCP anode system istalled to protect the hull of a floating storage vessel
- Installation: Topside
- Offshore time: 4 days
- Unit is storm-recoverable
- 10 year life extension

Dana Triton FPSO retrofit
Project Case Study: Hanging ICCP anode system installed to protect the hull of a floating storage vessel
- Installation: Topside
- Unit is storm-recoverable
- Remote O&M

6 Bay Marchand Platforms
Project Case Study: Anode Retrofit of 6 Bay Marchand Platforms
- 6 structures
- 61 Anode strings
- 5 year life extension

Tubular Bells
Project Case Study: Anode retrofit for production pipelines in Mississippi Canyon
- Water depth: 4,500 ft
- Installation: ROV

Ship Shoal Structures
Project Case Study: RetroLink anode strings on shallow-water assets in the Gulf of Mexico
- 64 RetroLinks
- 25 Structures

Black Bay Platforms
Project Case Study: Anode strings retrofit on 69 structures in Black Bay, Gulf of Mexico
- 115 Anode Strings
- 22 Continuity jumpers
- STRUCTURES: 69
- OFFSHORE TIME: 22 DAYS

24 Inch Methanol Pipeline
Project Case Study: RetroMat anode sleds installed on the Atlantic methanol pipeline in EG
- LOCAL ASSEMBLY
- OFFSHORE TIME: 3 Days
- LENGTH: 2 KM
- AS LEFT: -1.025V vs Ag/AgC

Eugene Island 295-A
Project Case Study: Spent platform anodes replaced with subsea anode strings by divers
- INSTALLATION: DIVERS
- INSTALL TIME: 60 HOURS
- DEPTH: 220 ft

Ewing Bank 305-A
Project Case Study: Two large impressed current anode sleds installed on a GOM platform
- WATER DEPTH: 300 FT
- 20 YEAR LIFE EXTENSION
- 800 AMPS of CP Current

8 inch Pipeline
Project Case Study: RetroLink Anode Strings used to retrofit cathodic protection on 8 inch pipeline
- Installation: Divers
- Offshore time: 30 hours
- Length: 4.5 km
- As left: -0.998V vs Ag/AgCl

Shenzi Subsea Tree
Project Case Study: SunStation CP monitoring system interrogated by ROV at 4,300 ft
- Water Depth: 4,300 ft
- 25 Year monitoring system
- No batteries required

Ras Gharib Platform
Project Case Study: Retrofit anode sleds or a fixed platform in the Red Sea
- INSTALL: DIVERS
- INSTALL TIME: 24 HOURS
- DEPTH: 14 m
- AS LEFT: (-)1.050V vs Ag/AgCl

ERWB Jackets
Project Case Study: Seabed anode sleds retrofit CP on Gulf of Thailand platforms
- Bridge-connected jackets
- Water Depth: 200 ft
- Install Time: 60 hours
- Seabed anodes only

BARD offshore transformer platform
Project Case Study: Four Retrobuoy systems for a fixed platform in the North Sea
- Platform installed 2010
- Premature anode failure
- 25-year design life

Duncan Wharf
Project Case Study: Cathodic protection retrofit using impressed current anode sleds
- Semi-Artic temperatures
- 3,700 AMPS of CP

Hydrogen Embrittlement Study
Project Case Study: Hydrogen Embrittlement Study

I-Rod® 28 years after installation
