Hydrex Performs Underwater Stern Tube Seal Repair

Thursday, October 03, 2013

In August, the stern tube seals of a 67-meter, 2223 grt anchor handling vessel were replaced in Port Gentil by a Hydrex team of diver/technicians. The old seals were damaged and a fast repair was therefore necessary. The team carried out the entire operation on-site and underwater with one of the company’s flexible mobdocks. This saved the owner an unscheduled trip to drydock.

All Hydrex offices have fast response centers. These are equipped with the latest facilities, equipment and tools to increase speed of service. Special flight containers are used to transport the lightweight flexible mobdocks. This allowed for a very fast mobilization and a timely arrival of the Hydrex team in Port Gentil.

First the diving team set up a monitoring station. Next the actual operation started with a thorough underwater inspection of the stern tube seal assembly. This revealed that a fishing net had become tangled around the assembly.

The team detached the rope guard of the vessel and removed the fishing net from the liner. The divers then set-up the flexible mobdock around the stern tube seal assembly thus creating a dry underwater environment. It allows the divers to perform any necessary work on the assembly in conditions similar to a drydock. This is essential because stern tube seal repairs cannot be carried out in the wet. Next the team disconnected the split ring and brought it to the surface. After cleaning the entire assembly, the divers removed the first stern tube seal. A new seal was then installed and bonded. The other three damaged seals were then replaced following the same procedure.

Pressure tests were then carried out with positive results after which the flexible mobdock could be removed and the rope guard reinstalled. This wrapped up the operation.

For almost twenty years Hydrex has carried out repairs and replacements on stern tube seals on-site and underwater. Hydrex said it constantly invests in the research necessary to keep developing new repair techniques and evolving existing procedures. This has made it possible for Hydrex divers to perform permanent repairs to all parts of the underwater ship propulsion system in drydock-like conditions.

For many years Hydrex's technical department has been dealing with all kinds of circumstances in locations around the world. This enabled Hydrex's team in Port Gentil to perform the seal repair under the strictest safety regulations, to the highest quality standards and without any delay.

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

People & Company News

USCG Search for Missing Crew of El Faro

Coast Guard search and rescue crews continue searching for possible survivors from the cargo ship El Faro Monday night, covering a total search area of more than 160,574 square nautical miles.

Northern Fleet to Conduct Anti-terrorist Exercises

The sailors of the Northern Fleet will conduct anti-terrorism exercises at Novaya Zemlya. During the exercise, the coast will be a landing. The landing will

ADF’s New Amphibious Capability Demonstrated

Australia’s newest military capability, the Amphibious Ready Element, has demonstrated its capacity in waters off the North Queensland coast during the Sea Series of exercises.

Ship Repair & Conversion

Towering Damen Marine Components Hits 150‏

Damen Marine Components (DMC), the oldest company in Damen Shipyards Group, celebrates its 150th anniversary today. DMC has grown from a very small shipyard established in Gorinchem in 1865,

MARAD Backs Emissions Reduction Projects

The U.S. Department of Transportation’s Maritime Administration (MARAD) announced it will provide more than $1 million to support the development of two new emission-reducing maritime solutions.

S. Korea Keeps Top Spot in Shipbuilding Beating China, Japan in Q3

South Korean shipbuilders have ranked first in the world outpacing Chinese and Japanese rivals in terms of new orders in the third quarter of the year, reports


Weak Capesize Rates Depress Baltic Index

The Baltic Exchange's main sea freight index, which tracks rates for ships carrying dry bulk commodities, fell on Tuesday on weak demand for capesize vessels. The overall index,

U.S. Investigators Head to Florida to Probe Ship Lost in Hurricane

Federal safety investigators traveled to Florida on Tuesday to investigate the U.S. container ship lost at sea after being hit by powerful Hurricane Joaquin, leaving

USCG Search for Missing Crew of El Faro

Coast Guard search and rescue crews continue searching for possible survivors from the cargo ship El Faro Monday night, covering a total search area of more than 160,574 square nautical miles.

Underwater Engineering

KEP Marine Releases Video Recording Products

KEP Marine releases today the innovative network video recording system and new HD cameras. The plug-and-play KVNR-8001 network video recording system is

Kruszewski Joins Braemar Engineering

Braemar Engineering, the specialist maritime engineering consultancy, today announced the appointment of Chis Kruszewski to the role of Senior Electrical Engineer in its Offshore,

Tuco Debuts New Dive and ROV Support Boats

Denmark’s Tuco Marine has revealed its new dive support and ROV Support boat designs. The two new vessels complement the designer’s range of ProZero workboats and

Maritime Contracts Naval Architecture Navigation Pipelines Pod Propulsion Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | 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: 0.1831 sec (5 req/sec)