To main content

Rock installation, PDET

In 2008 Boskalis was approached by Petrobras to carry out a rock installation project at the oceanic terminal, one of Petrobras’ offshore oil production locations. The terminal, situated at Campos Basin offshore Rio de Janeiro, Brazil, is a maritime complex consisting of one Independent Re-pump Platform (PRA-1), two monobuoys and a FSO vessel which links to a 20 inch gas pipeline system.

The pipeline network total extension of 25 km consists of three Pipeline End Manifolds (PLEM) installed on the seabed at a depth of approximately 100 m. The terminal, constructed to comply with the Oil Outflow and Handling Master Plan of Campos Basin – PDET, was the solution for the oil outflow produced at platforms P51, P53, P55 and Roncador module. Petrobras pro-actively initiated this project to ensure the future integrity and safety of the oil production facilities. Petrobras considered specialized accurate rock installation techniques to protect, stabilize and isolate the pipelines and subsea structures and in doing so to protect the environment. For Petrobras, Boskalis and partners it was the first time an IBAMA (Environmental) licensed rock installation project was carried out in Brazil. IBAMA issued this license after a detailed analysis of amongst others the impact on the environment and the proposed measures to mitigate turbidity during the installation process. Also the IBAMA guidelines with regard to the selection of the quarry mining, production of the rock, logistics and actual loading of the vessel, were fully met.

Quality and safety performance

The safety performance on the project was excellent. Before mobilization several safety and quality pre-inspections were carried out by independent auditors and Petrobras representatives; all findings and observations were resolved before arrival in Brazil to guarantee a smooth importation process. During the project preparation phase the Boskalis NINA (No Injuries No Accidents) program was implemented; all truck drivers and other personnel were successfully trained and explained the values and rules of the safety program. Special attention was paid to safe driving, the Boskalis Offshore theme for the year 2011. Thanks to the thorough preparations almost 400,000 accident-free km were driven on the project.

Related projects

Selected filters

Installation gas pipeline, Balgzand-Bacton

BBL Company was established to design, construct, operate and exploit the Balgzand-Bacton Pipeline (BBL) for the transmission of natural gas from Balgzand, the Netherlands to Bacton in the United Kingdom. The overall length of the 36" offshore pipeline is some 230 kilometers. The capacity is around 42 million m3 of gas a day. As part of the pipeline installation, Saipem UK Ltd awarded Boskalis Offshore the contracts for the shore approaches at Julianadorp, the Netherlands and Bacton in the United Kingdom and the presweeping and rock dumping works along the pipeline route on the North Sea.

Rock_installation_near_wellhead_tower.jpg

Platform installation,
De Ruyter field

The De Ruyter field, discovered in 1996, straddles Blocks P10a and P11b in the North Sea, which are both operated by Petro-Canada. The development consists of a Gravity Base Structure (GBS) with wellhead and lattice towers supporting an Integrated Production Deck (IPD). De Ruyter joins Hanze as Petro-Canada’s second operated offshore field in the Dutch North Sea. Heerema Zwijndrecht was awarded the fabrication, installation and hook-up of the GBS and IPD. The transportation, installation and stabilisation of the GBS was subcontracted to a consortium between Smit Marine Projects and Boskalis Offshore.

HL_Stralsund_header.jpg

Bridge construction, Stralsund

SMIT’s 1,200 tonnes sheerlegs Taklift 7 completed a major German bridge building programme during 2006. The sheerlegs had spent several months at the new Stralsund Bridge, on the German Baltic coast. This suspension bridge links the mainland with the island of Rügen.

Nearshore_excavation_header.jpg

Pipeline construction, Mumbai Highfields to Uran Trunkline

The Mumbai High Fields to Uran Trunkline Project is situated near Mumbai (Bombay) in India. ONGC Ltd (Oil & Natural Gas Corporation) has constructed two new pipeline connections from the Mumbai High Fields to Uran over a total length of 204 kilometers. These new pipelines have been constructed in order to replace the existing Bombay High Fields to Uran Trunkline, which had already completed more than 25 years of successful operation and had surpassed its design life. The new pipelines are a 30" oil pipeline and a 28" gas pipeline.

Backhoe_dredger_Cornelius_trench_dredging_header.jpg

Construction gas pipeline
Beachfield Upstream
Development

The BUD project entailed the construction of a 66 kilometer, 36" gas pipeline, 63 kilometers offshore and 3 kilometers onshore underground to the treatment facilities. The offshore pipeline runs from the east coast at Beachfield (Rustville), Guayaguayare, to the 'Cassia B' platform complex. At the NGC Abyssinia facilities, 3 kilometers off Beachfield, a new sludge catcher has been developed to separate the liquid or condensate from the natural gas. The condensate is separated from water and metered. The station is also designed to control the pressure of gas, as it enters into the land gas transmission system. NGC's existing 30" and 24" gas pipelines have also been diverted to the new Abyssinia sludge catcher.

IMG_2683_header.jpg

Seabed preparations, Changi Outfall

The Public Utilities Board implemented the Deep Tunnel Sewerage System as a long-term solution to meet the needs for sewerage water collection, treatment and disposal to help maintain Singapore’s clean and healthy environment. In phase one of the Deep Tunnel Sewerage System, the Changi Water Reclamation Plant was constructed in the east of Singapore, from which the Changi Outfall was subsequently constructed. Treated effluent from the water treatment plant will flow through outfall pipelines and be discharged through series of diffusers, dispersing the effluent in the seawater. Boskalis International was awarded the contract for the Changi Outfall in 2002 and formed a joint venture with Archirodon to construct the project.