• Immediate worldwide mobilization key benefit for underwater shaft seal repairs

    Immediate worldwide mobilization key benefit for underwater shaft seal repairs


    We have developed a flexible mobdock repair method that enables  the underwater replacement of all types and sizes of shaft seals. It allows ship owners to keep their vessel sailing, saving precious time and money.

    Damaged stern tube seals will cause an increasing amount of oil leaking or water ingress. By replacing the seals when the damage is first discovered, Hydrex keeps the down time low. The ship can keep its schedule as seal repairs can be performed during cargo operations.

    It is not always straightforward to replace seals, because there can be quite a bit of variation in the configurations of the stern tube itself. There can also be complications with the liners, which can be worn down and show ruts. All this is routinely handled by our teams on the jobs.

    Every Hydrex office is equipped with all the latest facilities, lightweight equipment and tools. This allows for a timely arrival of Hydrex teams on any location around the world with everything they need to successfully complete the job. Below you can find a short summary of a recent stern tube seal repair that illustrates the advantage of our well stocked fast response centers.

    Speedy underwater seal renewal in Singapore
    A Hydrex diver/technician team carried out underwater stern tube seal repairs on a 138-meter LNG tanker during the vessel’s stop in Singapore. The ship’s stern tube was suffering an oil leak, making a quick on-site repair necessary.

    We have been using our flexible mobdock technology successfully for well over a decade and our teams have carried out many shaft seal replacements underwater in that period. As a result our technical department was able to offer a repair plan to the customer very quickly. Once the operation was approved, all preparations were handled swiftly and the lightweight equipment was mobilized from our fast response center almost immediately. Within a matter of days our diver/technicians were on-site and ready to start the seal replacement.

    During the operation the team removed the three damaged seals and replaced them with new ones. Working together with the OEM allowed us to provide our customer with original spare parts which guarantees the best quality material. A technician of the seal manufacturer was also present during the operation.

    Taking advantage of the Hydrex flexible mobdock technique the team was able to carry out the entire repair on-site and underwater. Because all the required material is ready to be transported at all times, no time is lost making preparations. As a result the owner of the LNG tanker did not have to delay his ship’s schedule unnecessary, let alone arrange a costly and unwelcome trip to drydock.