Retrosled^™

Tabu, Guntong, Semangkok

Project case study: Anodes replaced during pipeline survey campaign

• 3 pipelines
• Installation: ROV
• Install time: 4 days

Forties field flowlines

Project Case Study: Anode retrofit for the in-field flowlines in the North Sea

• Install time: 60 hours
• Depth: 106 m

Alba Field

Project Case Study: Anode replacement on a pipeline in EG

• Installation: ROV
• Depth: 200 ft
• Sacrificial anode sled

Tubular Bells

Project case study: Anode retrofit for production pipelines in Mississippi Canyon

• Water depth: 4,500 ft
• Installation: ROV

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

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

Montara CP test stations

Montara Pipeline fitted with CP test stations

• Wellhead trees and PLET needed electrical continuity
• Piggybacks on flowlines lacked continuity
• Tiebacks were used to ensure electrical continuity
• RetroClamp™ CP test stations were added

Green Canyon

Project case study: Anode sleds installed at Neptune and Shenzi fields

• Water depth: 4,400 ft
• Install time: 3 days

Brent pipeline

Project case study: Pipeline anode retrofit with mattresses

• 12 km pipeline
• Conctrete weight coat
• 15 year life extension

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™

Pipeline Excavation Tool (PET™) installs RetroClamp™

Excavation of shallow buried underwater pipeline near Grand Isle, LA

• Entire operation done from topside - no divers
• Took two hours to excavate and install RetroClamp™
• Whole operation including setup and demob took one day

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

Tapis-F & Irong Barat B

Project case study: Anodes replaced on two Malaysian platforms

• Fixed platforms
• Installation: ROV
• Install time: 63 hrs

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

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

Ras Gharib platform

Project case study: Retrofit anode sleds for 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

Olympus Field PBGs

Project case study: Self-monitored anode sled protects 24 new PGBs at 3,000 ft for 45 years.

• Installation: ROV
• Install time: 30 hours
• Battery-free monitoring
• 45-year design life

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

Houston Ship Channel dock

Project case study: Houston Ship Channel retrofit

• 5 docks protected
• Installation: Divers
• 47 RetroLinks™ installed
• 16 ICCP anodes installed

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

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

6 Bay Marchand platforms

Project case study: Anode retrofit of 6 Bay Marchand platforms

• 6 structures
• 61 anode strings
• 5 year life extension

Ship Shoal structures

Project case study: RetroLink™ anode strings on shallow-water assets in the Gulf of Mexico

• 64 RetroLinks™
• 25 structures

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

Frying Pan Tower

Project case study: Offshore bed and breakfast platform anode retrofit

• Civilian owned
• 12 RetroLinks™

Zafiro Producer

Project case study: Impressed current cathodic protection of FPSO hull

• Water depth: 590 ft
• Dynamic cable
• 800 Amps CP

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

Bahamas loading dock

Project case study: Failing dock anodes replaces with topside anode strings

• Sacrificial anodes
• Diverless install

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

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

BARD Offshore 1 OSS retrofit

Project case study: RetroBuoy™ ICCP anode system for an OSS transformer platform

• Platform installed 2010
• Premature anode failure
• 25-year design life

Case study: Sendje Ceiba FPSO outfitted with RetroBuoy™ ICCP sled

Project case study: RetroBuoy™ ICCP anode system installed to protect the hull of a floating storage vessel

• Up to 500 amps for 20 years
• Initial current required: 190 amps
• Final current required: 404 amps

Enterprise dock anodes

SACP retrofit of dock structure and pilings in Beaumont, Texas

• Sections of dock, dolphins and piles had insufficient CP
• Anodes added to supplement existing land-side ICCP
• Continuity cables added to discontinuous sections

Sheringham Shoal anode strings

RetroLink™ anode string tested on wind farm monopile

• Inadequate CP on external sections of pile
• Retrofit couldn't use divers or welding
• RetroLinks™ attached to custom clamps
• Current monitoring and reference electrodes added

PanYu 30-1

Project case study: ICCP anode retrofit for eight-leg structure in the South China Sea

• Water depth: 200 m
• Fixed monitoring

Kitchen Lights

Project case study: ICCP anode system for a new platform in Alaska

• New fixed jacket
• Cook Inlet, Alaska
• Impressed current

Duncan Wharf

Project case study: Cathodic protection retrofit using impressed current anode sleds

• Semi-Arctic temperatures
• 3,700 AMPS of CP

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

Gunfleet Sands wind farm anodes

38 monopiles retrofit in Gunfleet Sands

• 38 monopiles retrofitted in Gunfleet Sands
• Monitoring added to 6 Gunfleet Sands monopiles
• Monopile in Lincs gets CP retrofit and monitoring

Dock Cathodic Protection

Anodes systems for Docks, Jetties and Piers

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 installed 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

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

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

LINCS wind farm monitoring

Monitoring systems for wind monopiles

• Wind monopiles without internal coating or CP
• Long-term monitoring on sampling of structures
• Corrosion coupons measure wall loss over time
• Electrical resistance system logs data

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

Dudgeon OWF

Project case study: Remote cathodic protection monitoring system installed in the North Sea

• 4 offshore turbines
• 32 km offshore

Offshore drill stack

Project case study: CP levels monitored and corrected

• Recap Datalogger
• CP & Coating Remediation

Hydrogen Embrittlement Study

Project Case Study: Hydrogen Embrittlement Study

I-Rod® 28 years after installation

The cost of a bad pipe support