PROSERV OFFSHOREPIPELINE REPAIR –CASE STUDIES

Working�examples��of�our�pipeline��repair�projects�from�around�the�world.

www.proserv-offshore.comemail us at: info@proserv-offshore.com

Our specialist tools for pipeline repair include:

• Seabed Dredging

• Protective coating removal – to safely remove all coating materials including concrete weightcoat, epoxy and bitumen, even on live pipelines.

• Cold cutting solutions – with many options available this is adaptable depending on the shape, diameter or challenges of the project.

Project Histories

Proserv Offshore’s project history for underwater pipeline repair spans the globe from the North Sea to the Gulf of Mexico, from offshore China to the Caribbean:

• 50mm weightcoat removal and underlying cold tar removal on 28 inch pipeline for Shell Brunei, 2007. Location – Brunei

• Coating removal on 30-inch pipeline cased in 65mm of weightcoat and underlying fusion bonded epoxy. ExxonMobil Sage Hot Tap project for Acergy, 2007 & 2008. Location - North Sea, UK

• Coating removal on 32-inch pipeline cased in 65mm of weightcoat and underlying fusion bonded polyethylene and bitumen encased field joints. Shell Tampen Hot Tap project for Acergy, 2007. Location - North Sea, UK

• Removal of Marine Growth and 30mm thick neoprene coating from an existing Drill Cuttings Caisson from +1m to -5m for the installation of a repair clamp. A specific tool was designed to meet the reduced clearance between nearby caissons and included an innovative rotating nozzle for increased cleaning area. Shell Brent Bravo & Brent Charlie for Sigma 3, 2007 & 2008. Location - North Sea, UK

Proserv�oFFsHore�Are�World�leaders�in�the�design�and�engineering�of�bespoke�subsea�tooling.�Within�our�range�of�equipment�are�the�tools�and�proven�methodologies�required�to�conduct�pipeline�repair�projects�or�intervention�operations�anywhere�in�the�world.�our�systems�and�procedures�collectively�cater�for�the�range�of�pipeline�diameters�currently�typical�within�the�subsea�industry,�however,�our�tooling�solutions�can�be�adapted�for�any�unique�projects.

• Coating removal on 36-inch pipeline cased in 80mm of weightcoat and underlying fusion bonded epoxy for wet buckle repairs. Damaged sections then removed using JetCut water abrasive cutting system. NGC BUD for Stolt Offshore, 2006. Location – Trinidad.

• Separation of Flow-line flanges from the Subsea Tree spool piece with a Proserv Offshore designed for purpose flange cutting system. ROV deployable the system ensured no damage was done to either of the flange faces. Elang Kakatua Repair for Fugro, 2007. Location - East Timor Sea, Indonesia.

• Decommissioning of 50-inch polyethylene pipeline with 4-inch wall thickness. Newmont Gold, 2008. Location - Indonesia.

ColdCutting

Solutions

Seabed Dredging

Coating Removal Systems

delivering�world�leading�engineering�solutions�to�the�global�subsea�industry.

www.proserv-offshore.comemail us at: info@proserv-offshore.com

The Tooling Solutions:

Dredging

Proserv Offshore’s subsea dredging systems are ideal for clearing debris and sediment away from pipelines prior to inspection, repair or intervention work. Capable of being either ROV or diver operated these systems can have customised hose length and exhaust throw distance to tailor them to the specific requirements of the project.

Our unique range of dredging systems have the additional benefit of an unrestricted flow system which allows for a higher rate of suction and ultimately results in maximum productivity per dive.

Coating Removal

Proserv Offshore has developed a range of highly innovative and versatile tooling packages capable of removing any protective coating, including concrete from subsea pipelines. Designed to be either ROV or diver deployed and powered by high pressure water our tooling package covers a diameter range from 8”- 80”

Cold Cutting Solutions:

Water abrasive cutting: Jet Cut

Our JetCut system uses the latest water abrasive technology, with a direct injection of abrasive material into the water stream. This method is deemed to be one of the safest solutions available due to the shock free cutting area, no heat affected zones and the cutting action is completely inert. Capable of cutting both internally and externally from a diameter range of 6” to 180” the range of cutting proficiency for this tool is wide, including concrete coated steel pipelines, jacket legs and piles

Diamond Wire

Our Diamond wire saws allows for a rapid yet operationally safe, guaranteed and controlled external cut on tubular from Ø8” up to Ø44” without depth limitation. These systems can be mated and operated directly from the ROV or remotely operated from the topside for diver or ROV intervention and only require a small deck footprint for the ancillary equipment.

Friction disc

Our friction disc cutters have been manufactured to be used for cutting subsea flow-lines, guide posts, drill string, chain and heavy wall tubular, as well as solid structures up to 9” outside diameter. These cutters can be operated by either diver or ROV.

RPS Saw

The reciprocating saw can be utilised for both surface and subsea applications, where for the latter it can be deployed by either diver or ROV. This tool is capable of cutting through a wide variety shapes and sizes, such as flexible risers, H beams and mooring chains. While being both safe to use and environmentally friendly.

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