Future vision of heavy well intervention

A future vision of heavy well intervention, the 154.4m-long and 29.4m-wide vessel is equipped with the HVG Terra Invader 750 drill tower and is deployable in water depths up to 2,500m.
The integration of the Herrenknecht equipment resulted in a compact, fully integrated vessel design, specifically aimed at cost efficiency in medium and heavy well intervention operations, punching well over its weight with regards to drilling capabilities, the companies said.
The large, free work deck of the DP3 Ulstein DX105 with direct access to the moonpool, allows the vessel to carry a large diversity of additional well equipment, including coiled tubing equipment, wireline equipment, multiple X-mas trees and other subsea equipment, cementing equipment and storage of extra drill pipes, risers and casings, well testing equipment and future well technologies.
The HVG drill tower consists of an A-frame structure, anabling easy access to the drill floor. “By using an automated horizontal racking system, a light substructure could be realised, which in combination with the weight-saving A-frame solution resulted in a lower CoG,” said HVG’s Dennis Vollmar.
“Over the last decade, deepwater drilling has taken a flight, meaning that in the near future these wells will need servicing and maintenance,” Bram Lambregts, deputy director at Ulstein Design & Solutions BV added. “Its higher payloads and mobilisation speed compared with semi-submersibles ensure that the Ulstein DX105 is less dependent on nearby infrastructures. This is of great importance for well intervention operations in remote areas and harsh environments, which is further enhanced by applying the proven Ulstein X-Bow® to increase the operational window of the vessel.”