Specialist contractor, DOF Subsea, has taken delivery of an advanced design of deep-swimming ROV from Saab Seaeye, destined for Brazil. The new 3000 metre-rated Cougar XTi ROV features technological developments that open up a greater range of deep water applications. It will be permanently commissioned aboard a specially built DOF Subsea vessel, along with two hydraulic work-class vehicles.
The vessel has been constructed in Norway and will operate offshore in Brazil for Light Well Intervention.
The onboard Launch and Recovery System (LARS) has been built by ODIM, and includes Active Heave Compensation.
Shrinking the size of LARS has been made possible by reducing the diameter of the umbilical from a typical 32mm down to 20mm through new ROV power technology.
A thinner umbilical also offers less drag; and the 800Hz high frequency power system cuts the size of the ROV's on board transformer by 80% thereby improving the vehicle's power to weight ratio.
Other key developments include a fault tolerant system that isolates any failed component and allows the ROV to keep working at its designated task.
Pilots get fault diagnostics through a simplified man/machine interface that interprets the fault data for them before clearly displaying the problem and the remedial action to be taken.
Clever system integration makes the ROV more software driven than hardware dependent and therefore easier to reconfigure for different operational roles.
It means different task-specific tooling skids can be readily added and changed as needed, along with custom designed options for specific operational needs.
Such tooling can include manipulator packages, anvil and disc cutters, water-jetting equipment, torque tools, survey packages with camera booms, drill support and IRM tooling.
The ROV also has a new autopilot system that gives the pilot more precise positioning of the vehicle by automatically holding depth and heading in much tighter parameters than ever before.
The Cougar XTi is an upgrade of the long proven Cougar concept, with breakthrough technology introduced from Saab Seaeye's flagship Jaguar electric work-ROV.
Saab Seaeye's managing director, Dave Grant says, "The Cougar XTi opens up a whole new market for the concept of a combined inspection and light work-ROV. Providing operation to 3000m depth the Cougar XTi can either perform tasks independently or provide support for the work of construction class hydraulic ROV's. It also brings important cost savings in deck space and can be provided with a compact single skid solution for the LARS."
The Cougar XTi is a development that will maintain Saab Seaeye's lead position as the largest manufacturer of electrically operated ROVs. Its parent company is Saab Underwater Systems, a world leader in sensor systems, precision engagement systems, and remotely operated and autonomous underwater vehicles.
For DOF Subsea, the Cougar will add to the company's extensive capability in providing construction and engineering, IRM, ROV and survey support services to the world's major subsea markets.
DOF Subsea employs over 800 highly qualified staff and own state of the art equipment including 26 offshore construction, diving and ROV support vessels, 37 ROVs, 1 AUV and 11 diving spreads.