Rapid Underwater Bow Thruster Removal Avoids Drydocking

MarineLink.com
Tuesday, May 28, 2013
Photo: Hydrex

A Hydrex diver/technician team mobilized to Tacoma, Washington, U.S. last month to remove the bow thruster of a 294-meter container vessel. The unit needed to be overhauled. Hydrex performed the operation underwater in a very short time frame. This made it possible for the owner to keep his vessel out of drydock.

Together with all the necessary equipment, the team mobilized from the Hydrex office in Clearwater, Florida to the vessel’s location. After they set up a monitoring station on a workboat, the divers started the operation with a detailed inspection of the bow thruster unit and tunnel.

One by one, the diver/technicians then detached the blades and replaced them with blind flanges to prevent oil from leaking from the thruster. In the meantime, initial preparations were made in the bow thruster engine room for the removal of the unit so that there would be no ingress of water once the unit was taken out.

The next step was to secure the gearbox with hoisting equipment. The team then disconnected the bow thruster unit from the engine room and lowered it onto a cradle. This cradle was designed especially for thruster operations. It can be adjusted to the size of the unit. In this manner the thruster is prevented from tipping over and Hydrex divers can remove the unit in one take.

Simultaneously the team installed a blind flange to seal off the thruster tunnel from the engine room. Once the unit was lifted onto the workboat, the team prepared it for transport to the manufacturer.

Performing a job like this on a tight schedule takes a lot of planning. This can only be done successfully by staff who have familiarity with such operations and have the relevant know-how and equipment. Hydrex has a technical department capable of executing all the required planning. Our diver/technicians are trained and qualified to perform the full range of required class-approved repair procedures in even the harshest conditions.

Off-hire time causes a substantial loss of money. The teams therefore worked in shifts to perform the bow thruster removal within the shortest possible time frame. This saved the owner the time and money which going to drydock would have entailed.

www.hydrex.be
 

Maritime Reporter February 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Palfinger Chooses NAMJet Waterjets

Netherlands-based Palfinger Boats has launched the first of two Damen-designed FRSQ 1200 fast-rescue/oil response vessels.   Built in Harderwijk, Netherlands,

ABG Ties Up with GTT for LNG Technology

ABG Shipyard Ltd has tied up with Gaztransport and Technigaz (GTT) of France for the maritime transportation and storage of liquefied natural gas (LNG), reports Livemint.

Methanol Powered Ferry Launched in Baltic Sea

Swedish ferry operator Stena Line has announced that it has converted the Stena Germanica to run on methanol, an industry first.   The company spent $24 million on converting the ship to methanol.

Ship Repair & Conversion

ABG Ties Up with GTT for LNG Technology

ABG Shipyard Ltd has tied up with Gaztransport and Technigaz (GTT) of France for the maritime transportation and storage of liquefied natural gas (LNG), reports Livemint.

Heerema Signs LOI with Jurong Shipyard for Giant Crane Vessel

Dutch offshore contractor Heerema Offshore Services has signed a letter of intent (LOI) with Sembcorp Marine’s Jurong Shipyard in Singapore for the construction

Methanol Powered Ferry Launched in Baltic Sea

Swedish ferry operator Stena Line has announced that it has converted the Stena Germanica to run on methanol, an industry first.   The company spent $24 million on converting the ship to methanol.

Underwater Engineering

Keppel FELS Delivers 11th Jackup to Mexico

Keppel FELS Limited (Keppel FELS), a wholly owned subsidiary of Keppel Offshore & Marine Ltd (Keppel O&M), has delivered a KFELS B Class jackup rig to Mexican national oil company,

US Navy to Roll out Underwater Spy Satellites

The robotic series that remade crusade in skies will shortly extend to a low sea, with underwater view “satellites,” drone-launching pods on a sea building and unmanned ships sport submarines,

Statoil: Polarled Pipe-Laying Kicks Off

On 26 March, the Solitaire pipe-laying vessel started on the first stage of the Polarled installation project. The 482-kilometre long pipeline will transport gas

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Offshore Oil Pod Propulsion Port Authority Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1479 sec (7 req/sec)