DESIGNS Design Portfolio Offshore and Maritime Design Since our start in 2007, Bassoe Technology has developed a large number of mobile offshore units, and floating production units, RoPax ferries and expedition cruise ships for customers all over the world. Our designs are technically optimized, purpose designed, efficient and safe. Increased transit speed, excellent DP capabilities and higher performance characteristics are some of our key design features. So far, six of our units have been built and delivered, on time and on contracted deck payload capacity. Workover & Well Intervention Units Tender Support Units Drilling Semi-submersibles Drillships Arctic Units Production Semi-Submersibles Accommodation Units BT-4000 Light Workover Unit The BT-4000 LWO (Light Workover Unit) is a 32 600 tonnes displacement dynamic positioned semi-submersible developed by Bassoe Technology for light workover and well intervention operations in water depths up to 2400 m (7 879 ft) in offshore Brazil, Gulf of Mexico, West of Africa and South East Asia. It is designed for efficient and fast change-over between various well intervention operations with maximized preparations off the critical path. The BT-4000 has an optimized hull for motion and transit performance and is designed for a variety of workover operations, such as: Coiled tubing and wire line line/slick line through an open water intervention riser system (high pressure riser up to 10 000 psi) with a surface BOP Through tubing drilling and completion with coiled tubing or optional rotary drilling Top-hole rotary drilling Installation and retrieval of X-mas trees and different subsea equipment Installation and retrieval of electrical submersible pumps in wells and subsea pumping modules Well testing and well clean-up Pumping and circulation of various types of fluids through the workover/completion riser from a well stimulation vessel Well kill Installation, handling and operation of a subsea capping stack ROV operations Access to Derrick from Three Sides The BT-4000 has access to the derrick from three sides, which allows different operations to be carried out in parallel. Improved Operational Efficiency and Safety The BT-4000 is arranged with a skidding system for handling and transportation of subsea equipment. It accesses the well center from three sides, which, together with the flush drill floor hatch (moonpool door) design improves material handling efficiency and increases safety. A skidding system is also used for transporting the advanced coiled tubing frame to and from the well center, which facilitates pre-stabbing of the coil and testing in advance. For more information, See Projects. Contact info Address: Lilla Bommen 2, Gothenburg, Sweden E-mail: info@basstech.se Call us Phone: +46 31 855 800 © 2021 Bassoe Technology. All rights reserved.