Game-Changing Carrera E Precision Flow Excavation Spread
Following an extensive R&D trajectory, subsea technology company Seatools introduces the revolutionary Carrera E 3D motion-controlled precision flow excavation spread. The 630+ kW, all-electric deep-water excavator features Seatools’ advanced ROV DP technology and sets the stage for unprecedented levels of accuracy, production, and workability in the mass flow excavation (MFE) market.
Seatools developed the Carrera E mass flow excavation spread leveraging its proven capabilities in heave compensation and ROV control technologies. The patent-pending spread features 3D motion control, which enables precision excavation operations at a minimum of seabed disturbance. Thanks to the Carrera E’s incorporated dynamic positioning (DP) capabilities, the tool may follow a pre-programmed track (e.g., a cable route) with high precision and in a highly automated manner.
The company arrived at the game-changing design by performing a holistic analysis on subsea excavation operations. Johan Sol, responsible for business development, explains: “Early on in the development process we analysed excavation operations as well as the direct and indirect cost drivers from a client point of view. Especially in terms of indirect cost drivers – vessel day rates, environmental downtime, survey costs, and crew costs – we found significant room for improvement: in some cases, total project costs could be cut by 50% while realising reduced environmental impact and safety improvements.”
The Carrera E is launched by means of a dedicated, actively heave-compensated LARS. The LARS minimises trench depth variation, and, under all circumstances, prevents physical contact between the product and the excavator. The motion control technologies – AHC and DP – maximise the spread’s workability and extensively boost both production rates and dredging tolerances. Even under adverse environmental conditions, such as strong currents and high-sea conditions. Above and beyond its superior positioning capabilities, the Carrera E’s boosted production rates can be attributed to a highly powerful and efficient all-electric drive configuration.
With over 500 kW of installed power dedicated to dredging, the spread takes on a wide range of soil conditions. Despite its hefty power rating, the MFE spread is compact in size. The LARS, including tool, only requires a 20-foot container footprint and a minimum of vessel interfaces. Combined with the fact that no tugger wires are required, all this means the Carrera E can be deployed from a wide range of vessels, including smaller, low day rate vessels. A final and subsequently gainful cost saver results from the high level of automation, as is common for Seatools’ fall pipe ROVs: in case of 24-hour operations, the spread can be operated by just four operators.
Value creation also results from its integrated survey capabilities. The Carrera E enables pre-process, intermediate, and post-process surveys without requiring a separate WC-ROV spread. In turn, creating a far more (cost-)efficient workflow. Mr Sol concludes: “We intend to upset the MFE market’s status quo. The Carrera E precision flow excavation spread represents a whole new performance level in terms of productivity, accuracy, environmental impact, and safety. And we are eager to see the change it will produce in markets such as offshore renewables, offshore decommissioning, and offshore oil and gas construction.”