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Underwater Demountable Thruster Exchanges & Repairs

SGS is the only company capable of delivering a complete turn key demountable thruster exchange including experienced service technicians for inboard and outboard operations, stand jacks systems, diving systems, and experienced diver/technicians.

Afloat Demountable Thruster Exchange

Subsea Global Solutions is the diving contractor of choice for underwater exchange of demountable azimuthing thrusters. We are the only company capable of delivering a complete turn key package including experienced service technicians for inboard and outboard operations, stand jacks systems, diving systems, experienced diver/technician, allowing SGS to have complete coordination on the job coupled with detailed planning ensure that the "inboard" operations being performed are synchronized with diving operations "outboard" of the vessel. This proven model has delivered on time and budget every time.

In addition to turn key removal and replacement of azimuthing thrusters, SGS can provide complete overhauls of all makers with OEM parts or OEM equivalent parts. With years of experience exchanging azimuthing and tunnel thrusters in the most remote locations of the world, SGS has the industry leading expertise and local vetted partners to support the offshore industry in all its areas of operation throughout the world.

We have pioneered the methods of exchanging of underwater demountable azimuthing thrusters without the need for expensive and weather dependent crane barges. Developing fully engineered plans of thruster exchange utilizing our buoyancy control procedures, large demountable units can be simply, safely and reliably exchanged in sea states up to Beaufort 2 using the rigs crane.

Subsea Global Solutions has demounted and overhauled azimuthing thrusters of all makes and models from major brands including ABB, Pleuger, Rolls Royce, Thrust Master, Wartsila and others.

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Underwater Demountable Thruster Exchange

See how SGS performs underwater thruster exchanges and repairs.

Case Studies

Hull Breach on Tanker

During cargo operations, a submerged pile pierced through the hull. SGS worked together with owner and class to develop repair plan that included the design and installation of an engineered cofferdam.

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Offshore Oil & Gas

A Blue-Chip oil & gas company incurred several defects and cracks in a critical attachment member of an FPSO’s hull – these defects required repair to allow continued operation.

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Skeg Ripped from Azipod

3 month out of dry dock, galvanic corrosion caused heavy cavitation/erosion damage on PORT and STBD side rudders.

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SGS Reseats Shifted Tailshaft Afloat and Executes a Stern Seal Repair

The client indicated that the tailshaft had shifted aft approximately 200 mm when the ship’s crew was doing maintenance on the shaft coupling. It resulted in the aft water seal losing contact with the liner, causing large amounts of water ingress into the stern tube.

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SGS Completes an Afloat Rudder Stock Seal Replacement

This complex underwater repair was completed to the client's satisfaction in 5 days in conjunction with various other repair works. SGS managed both the underwater and internal portions of this repair to ensure each phase was executed seamlessly.

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Underwater Propeller Blade Straightening – Cold Static Loading

SGS can restore your propeller blades as a permanent repair, to OEM design geometry by cold static loading with our underwater propeller blade press.

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Double Bow Thruster Removal by SGS

The benefits of removing a damaged bow thruster afloat are many. The customer was able to prevent further damage to the bearings and gears caused by the presence of seawater in the gear housing and the procedures allows the units to be overhauled prior to the vessels next dry-dock—or, they can be re-installed afloat by SGS, which would help to eliminate the need for additional tug cost.

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Afloat Bow Thruster Blade Seal Exchange by SGS

The project was executed with two SGS teams working around the clock. While the vessel trimming process was in motion, the team onboard the vessel began to drain the oil from the thruster while the dive team began removing the bow thruster tunnel gratings to gain full access to the bow thruster.

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Scrubber Overboard Spool Pipe Repairs with 5 Year Warranty

The installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. SGS’s involvement is focused on precision cutting of the hull penetrations for the sea chest openings and overboard spool pipe installation below the waterline.

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SGS solves serious problems: Assisting a large, fully laden post-Panamax container vessel with steering issues

SGS solves serious problems: Assisting a large fully laden Post-Panamax container vessel with steering issues. SGS works with port authorities, class, and manufacturers to provide class-approved in-water float out removal, repair, and refit of a 110 mt rudder. Find out how our underwater inspection and survey services deliver practical, cost-effective solutions to a complex offshore problem. SGS works with port authorities, class, and manufacturers to provide class-approved in-water rudder float out removal, repair, and refit of a 110 mt rudder. Helping owners safely reduce their risk exposure and related costs that would include diversions, delays, and downtime.

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Galvanic Corrosion on Rudders

3 months out of dry dock, galvanic corrosion caused heavy cavitation/ erosion damage on PORT and STBD side rudders.

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Underwater Demountable Thruster Exchanges & Repairs

Hull Cleaning

Afloat Demountable Thruster Exchange

Subsea Global Solutions is the diving contractor of choice for underwater exchange of demountable azimuthing thrusters. We are the only company capable of delivering a complete turn key package including experienced service technicians for inboard and outboard operations, stand jacks systems, diving systems, experienced diver/technician, allowing SGS to have complete coordination on the job coupled with detailed planning ensure that the "inboard" operations being performed are synchronized with diving operations "outboard" of the vessel. This proven model has delivered on time and budget every time.

In addition to turn key removal and replacement of azimuthing thrusters, SGS can provide complete overhauls of all makers with OEM parts or OEM equivalent parts. With years of experience exchanging azimuthing and tunnel thrusters in the most remote locations of the world, SGS has the industry leading expertise and local vetted partners to support the offshore industry in all its areas of operation throughout the world.

We have pioneered the methods of exchanging of underwater demountable azimuthing thrusters without the need for expensive and weather dependent crane barges. Developing fully engineered plans of thruster exchange utilizing our buoyancy control procedures, large demountable units can be simply, safely and reliably exchanged in sea states up to Beaufort 2 using the rigs crane.

Subsea Global Solutions has demounted and overhauled azimuthing thrusters of all makes and models from major brands including ABB, Pleuger, Rolls Royce, Thrust Master, Wartsila and others.

Looking for underwater maintenance and repair services?

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