Monthly Archives: January 2017

Holes in the Hull- Temporary Shell plate Repairs- Jan 2017

While operating in the Caribbean a vessel became aware that they were getting water ingress into one of the void tanks under the main propeller shaft. Subsea Global Solutions was contacted and after a discussion with the class surveyor, vessel management and Subsea Global Solutions engineering staff, it was decided to install a welded doubler plate to cover the breach in the hull during one of the vessels regular port calls. Subsea Global Solutions mobilized a crew to perform Ultrasonic thickness readings to gauge the integrity of the hull plating. Measurements were taken and the plate was fabricated.

Work began on the damaged area of the shell plate and a two-part marine epoxy was applied to seal the hole. The surrounding area was cleaned and prepped so the doubler plate could be installed. The doubler plate was fully welded using a multi-pass fillet weld. The process used by Subsea Global Solutions’ welder / divers is a Class society approved, AWS Class “A” weld.  By utilizing this multi-bead process our welder / divers are able to achieve weld qualities with metallurgical properties consistently found in high class top side welds.  Upon completion of the welding, all the welds and the heat affected parent metal was properly coated with an underwater epoxy.

The vessel sailed into the sunset safe and secure.  Delivering unrivaled in-water service at a moments notice is what Subsea Global Solutions is all about.  We are the GLOBAL RESOURCE to turn to for your in-service underwater maintenance and repairs. We remain available to support your needs anywhere and at any time.

We got a leak!- Shaft Seal Emergency Repair- Dec 2016

Following a scheduled dry docking event a vessel departed from the shipyard only to discover that there was a leaking shaft seal.
With the vessel going directly into service an in-service repair solution was required in order to keep the vessel afloat.  The client and the Service Provider that initially performed the work in dry dock contacted Subsea Global Solutions to evaluate in-service repair options.  After an inspection was performed in the initial port of entry it was determined that the seal assembly would require an in-service inspection and repair.  Preparations were made to gain access to the seal assembly.  The rope guard was gouged away with Subsea Global Solutions’ specialized Hydro-gouging system.  This allowed the welder / divers to gouge away the weld and leave the base material intact thus allowing the rope guard to be easily installed after the work was completed.

While the vessel transited to its next port of call, Subsea Global Solutions mobilized their dive support vessel “She Devil” to meet the vessel for repair in the lower Caribbean.  Upon the arrival of the damaged vessel, the team immediately began the installation of  Subsea Global Solutions’ TransHab- Flexible Hyperbaric Cofferdam to create a dry environment around the seal assembly.  Once installed certified seal / Diver-Technicians entered the Cofferdam and quickly determined the problem with the seal assembly.  The seal rings were renewed through a certified bonding process and the system was reassembled.  After two (2) working shifts, no leaks were reported and the Transhab Flexible Cofferdam was removed from the vessel so that it could continue on its voyage.

 

The Delivery of Unrivaled Service is what makes Subsea Global Solutions the leading underwater service provider.  We remain available at any time to support your inspection, maintenance needs or emergency repair needs globally.  One call and that’s all!