SELECTING THE MARINE SPREAD

Executing a project in mid-winter requires a special mindset. The days are short and there is a limited weather window for executing overboard works and offshore lifting operations. Conbit analyzed various options to advise the client optimally. In consultation with the client, the best mix between costs, availability and operational suitability was chosen. This resulted in choosing the DP2 crane vessel the Normand Reach.

LIFT PROCEDURE

Conbit designed a procedure involving a series of rigging and lifting handovers using several different sling configurations to move the tanks from their suspended position under the platform onto the supply vessel. The new replacement tanks were moved in the opposite direction.

The most critical step in the whole operation was the hand-over of the suspended tanks to the offshore crane. The same was true of the reverse procedure with the new tanks.

WINTER WEATHER

The contractual deadline for finishing the project was set to 31-01-2017, which meant executing the project in mid-winter. As the North Sea is infamous for its rough winters, the challenging weather was our main focus during project preparation.

The most weather-dependent activity was the hand-over between the platform and the vessel. We arranged all the steps and equipment in such a way that the two tanks could be replaced in series or in parallel (i.e. simultaneously). Thus, we could optimize the offshore planning to the weather forecast at the time of project execution.

Related case studies

Flare tip replacement, Kashagan Onshore Processing Facility

Bongkot North Flare Tip Replacement in Thailand

Conbit was tasked with performing the flare tip replacement at the Bangkot North gas field, located 100km offshore in the Gulf of Thailand.

Transport analysis transition pieces

ALE was awarded a project to transport Transition Pieces (TPs). The TPs will be transported via the River Tees from the manufacturer to the Able Port. For this project, ALE uses two existing [...]

Contact Us

We are not around right now. But you can send us an email and we will get back to you as soon as possible.

Not readable? Change text.

Start typing and press Enter to search