Underwater Repairs Keep 400m Containership in the Water

Posted by Eric Haun
Monday, July 14, 2014
Hydrex on-site, making preparations for operation on 400-meter container vessel.

At the end of June, a Hydrex team replaced the three leaking bow thruster shaft seals of a 400-meter container ship in Gdansk, Poland. The operation was performed on-site and underwater using the company’s flexible mobdocks. The vessel was able to continue its commercial activities without any hindrance or delay.

Together with all the necessary equipment, the diver/technicians mobilized from the Hydrex fast response center in Antwerp to the vessel’s location. After they set up a monitoring station on the quay, the divers started the operation by removing the rope guard covering the thruster seals. They could then perform a detailed inspection of the seal assembly and make a good assessment of the damage.

The Hydrex flexible mobdocks were installed at both ends of the thruster tunnel. Next the team evacuated all water from the tunnel. In this manner a working environment with drydock-like conditions was created. This is essential for any permanent seal replacement. The divers removed the first seal and replaced it with a new one which was then bonded. This procedure was repeated with the other two damaged seals. All seals showed cuts at the underside, which had caused the oil leak.

The operation ended with succesful leakage tests, the reinstallation of the rope guard and the removal of the flexible mobdocks.

During the operation representatives of both the manufacturer of the shaft seals and the bow thruster OEM were present. They followed the operation and gave their approval.

Ultra large container vessels like this 400-meter one have a corresponding large thruster tunnel. This was however no problem because the Hydrex flexible mobdocks can be easily adapted  to the circumstance. They can be used for a wide range of repair or maintenance work on all types and sizes of thrusters and vessels.

By performing the operation on-site and underwater, the divers made it possible for the owner to keep his vessel out of drydock. This was extremely important because the ship was only six months old. The Hydrex team worked in shifts around the clock. They finished the job well before the crew had concluded the cargo operations. This allowed the ship to sail perfectly on schedule.

hydrex.be
 

  • Hydrex diver/technician taking the plunge.

    Hydrex diver/technician taking the plunge.

  • The old seals had cuts at the bottom, causing the leak.

    The old seals had cuts at the bottom, causing the leak.

  • Hydrex team member supervising the underwater operation.

    Hydrex team member supervising the underwater operation.

  • Diver/technician working on the shaft seal assembly.

    Diver/technician working on the shaft seal assembly.

  • New seal positioned and bonded.

    New seal positioned and bonded.

  • Divers getting ready for underwater operation.

    Divers getting ready for underwater operation.

  • A monitoring station was set-up  next to the vessel.

    A monitoring station was set-up next to the vessel.

  • Hydrex diver/technician taking the plunge.
  • The old seals had cuts at the bottom, causing the leak.
  • Hydrex team member supervising the underwater operation.
  • Diver/technician working on the shaft seal assembly.
  • New seal positioned and bonded.
  • Divers getting ready for underwater operation.
  • A monitoring station was set-up  next to the vessel.
Maritime Reporter September 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Ship Repair & Conversion

Messer to Debut MetalMaster Xcel

Messer Cutting Systems said it has answered the call from manufacturers that have been demanding a faster, more accurate way of producing cut parts. Messer’s

Rolls-Royce Expands in the Canary Islands

Rolls-Royce announced it has signed a cooperation agreement with the Astican Shipyard in Las Palmas, Canary Islands that it said will enhance the service capabilities

USS Constitution Not to Set Sail Until 2018

The crew of USS Constitution embarked on their final Boston Harbor underway demonstration aboard Old Ironsides this year, Oct. 17. Constitution set out into

News

Missouri River Basin is Booming

The U.S. Army Corps of Engineers Missouri River Basin Water Management Division is maintaining above normal releases at the four lower dams on the Missouri River.

Bollore Africa Logistics Sees Profit Plunge in H1

First half 2014 profit at shipping company Bollore Africa Logistics plunged to 5.89 billion CFA francs ($11.48 million) from 9.45 billion CFA francs in the same period last year,

Twin Disc Offers Virtual and Real EJS Experience

Visitors to the Fort Lauderdale International Boat Show, October 30–November 3, 2014, can experience what it’s like to control a diesel-powered, conventional driveline

Underwater Engineering

Boskalis Consortium Wins Suez Canal Expansion Contract

A consortium consisting of Royal Boskalis Westminster N.V. (Boskalis), Van Oord, NMDC (Abu Dhabi) and Jan de Nul (Belgium) has acquired a contract from the Suez

Hydroid Wins Gold at MassEcon Impact Awards

Hydroid, Inc., a subsidiary of Kongsberg Maritime and a leading manufacturer of autonomous underwater vehicles (AUVs), today announced that it has been named

Mærsk Deliverer's Contract extended

Cabinda Gulf Oil Company Limited, a Chevron subsidiary in Angola, has extended the current contract for the ultra deepwater semi-submersible Mærsk Deliverer expiring in June 2015 by two years.

 
 
Maritime Careers / Shipboard Positions Maritime Security Naval Architecture Offshore Oil Pod Propulsion Port Authority Ship Repair Ship Simulators Shipbuilding / Vessel Construction 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: 0.3933 sec (3 req/sec)