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

News

Decade Old India Shipping Summit Makes History

In ten years, India Shipping Summit held consistently in Mumbai, has sailed on a robust growth course despite the worldwide witnessing recessionary waves buffeting any endeavors to grow and gain.

USCG to Ensure Safety During World Series

The Coast Guard and local agencies are working to ensure the safety of boaters and baseball fans during World Series games at AT&T Park this weekend. The

Areva-Siemens Raises Claim Over Finnish Reactor Delays

The French-German consortium Areva-Siemens , the supplier of Finland's much-delayed Olkiluoto-3 nuclear reactor, has increased its claim against Finnish utility Teollisuuden Voima (TVO),

Underwater Engineering

Navy to Commission Submarine North Dakota

The Navy will commission its newest attack submarine North Dakota, during a ceremony Saturday, Oct. 25, 2014, at Submarine Base New London in Groton, Connecticut.

Ezra Bags $70m in Offshore Contracts

Ezra Holdings Limited, a leading contractor and provider of integrated offshore solutions to the oil and gas industry, today announced that the Group’s Subsea Services division,

New Oil Field Found in British North Sea

GDF SUEZ E&P UK Ltd and BP today announced a new exploration discovery in the UK Central North Sea. The discovery, which spans GDF SUEZ operated block 30/1f

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Naval Architecture Offshore Oil Port Authority Salvage Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar
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: 0.1572 sec (6 req/sec)