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Jotun has Got Deepsea Stavanger Covered

Source: 5/18/2020, Location: Africa

Odfjell Drilling’s semi-submersible drilling rig Deepsea Stavanger is preparing for drilling operations off South Africa, where it will start a firm contract with French major Total. The dual derrick, dynamic positioned (DP), semi-submersible is set to work in demanding environmental conditions characterized by a combination of high fouling intensity and strong ocean currents, which could threaten the efficiency of operations.

Heavy fouling on the rig hull is expected to increase frictional drag and this, allied to the force of the currents against the rig walls, would make it harder to maintain the correct position. This creates a demand for greater thruster power.

As a result, Odfjell Drilling has hired Norwegian marine coatings provider Jotun to provide a premium anti-fouling and topside coating solution for Deepsea Stavanger to ensure optimum operations and durability, both above and below the surface.

Jotun is now applying the anti-fouling SeaQuantum Ultra S and topcoat Hardtop One, a unique polixiloxane coating, at the Semco Maritime yard near Bergen, Norway.

“It became clear that Deepsea Stavanger required an anti-fouling tailored to deliver a clean hull, and optimal performance, in the most challenging environmental conditions,” comments Lasse Isaksen, Global Concept Director – Offshore.

“Biofouling is as big an issue for the offshore industry, particularly with DP vessels, as it is for shipping, and with our established expertise in this niche we were perfectly positioned to find the right solution for this advanced asset.

“Our in-house anti-fouling team examined the individual vessel requirements, operational parameters, localised fouling intensity, and in-depth metocean data to determine the best coating. SeaQuantum Ultra S will deliver the results Odfjell Drilling and all its stakeholders demand, protecting the rig for long-term, durable operations, while its fast polishing silyl acrylate composition ensures a clean hull and optimal maneuverability and performance.”

Moving above sea level, the rig topside will be coated with Jotun’s Hardtop One, which according to Jotun, secures gloss retention and protection in the most intense sunlight and UV exposure.

Jotun and Odfjell Drilling have worked together for around 20 years, but this, according to Sales Engineer Rune Nautnes, who helped lead the collaboration from Jotun’s side, was one of the biggest single maintenance projects to date.

“The team at Odfjell Drilling provided first class data of the operating environment the rig would face and we used that, in combination with our segment understanding, to refine the ideal solution. This delivery, which consists of 19,000m2 of advanced anti-fouling, will help Deepsea Stavanger maintain optimal control and meet its demanding operational objectives,” he said.

To remind, Deepsea Stavanger secured the firm contract from Total back in July 2019.

The contract value, including compensation for mobilization and demobilization periods, is estimated at being between $145-$190 million plus incentives. The drilling program is expected to last between 180-280 days on the Brulpadda well, located in the Outeniqua Basin 175 kilometers off the southern coast of South Africa.

The Brulpadda well on Block 11B/12B was spud in late December 2018. Total encountered a total of 57 meters of net gas condensate pay over two Lower Cretaceous high-quality reservoirs and described the discovery as a ‘world-class play.’

The block covers an area of 19,000 square kilometers with water depths ranging from 200 to 1,800 meters.

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