BARRY, UK – The Harris Pye Engineering Group has completed repair works during the two-stage multimillion-dollar Diamond Offshore demobilization project for its semisubmersible Ocean Endeavor from the Black Sea. The rig completed its contract in January 2016.
The initial phase of the repair work started in December 2015, while the rig was offshore Constanta, Romania, and involved the cleaning of mud, brine, base oil and skimmer tanks. Steel repairs were carried out on a main column blister. The removal of three Seatrax crane pedestals, which included the supply and installation of internal steel stiffening to the pedestals, guides and jacking points, plus handling trunnions, were all required prior to cold-cutting of the pedestal.
Additional work awarded to Harris Pye in Romania was blasting and painting of four primary column ballast tanks. During the surface preparation steel renewal was added to the project. The blasting of all four tanks back to white metal was completed. Two tanks received a first coat of paint and two tanks were fully coated before Ocean Endeavor departed from Romania to Fincantieri Shipyard via a heavy lift vessel.
Harris Pye’s Chief Technical Officer, Chris David said: “Painting and blasting of the four ballast tanks had to be performed within a one month period. An additional 40 metric tons (44 tons) of steel was required to ensure the work on the tanks was completed within the required timeframe; this had to be brought in from other parts of Europe.
“Additionally, a mobile diesel high vacuum grit recovery system was shipped from the UK, due to the large distances involved from the ballast tanks to the recovery system onshore for the purpose of disposal. “All labor was from the local market, with equipment and materials coming from mainland Europe and the UK. Support to the onsite project team was provided by our workshop in Llandow, Wales, which undertook any pre-fabrication required, with Harris Pye UK (HPUK) stores (tools and equipment) and the HPUK purchasing department utilizing local suppliers where possible…
“Once Ocean Endeavor reached Palermo, the Harris Pye repair team mobilized to work on the remaining steel repairs, and painting of the ballast tanks, including an additional contract to repair a section of column diagonal brace. All works were completed on schedule."
The project lasted six months.