SUB-JET™ ROV-Attachable Waterjet System Cuts Steel Up to 250 mm Thick, Blasts Away Coatings and Corrosion at 3900 Bar
Chukar Waterjet, Inc. will unveil its new SUB-JET 3000™ ROV-attachable waterjet system at the OTC Offshore Technology Conference, May 2-5 in Houston. Look for Chukar in outdoor booth 546.
Chukar’s SUB-JET 3000 brings the power and versatility of ultra-high pressure (UHP) waterjet cutting and blasting to the deepwater subsea environment. Operable to 3000 meters, SUB-JET 3000 cuts steel as thick as 250 mm and quickly blasts away coatings, corrosion and marine growth at pressures up to 3900 bar. The SUB-JET 3000 is deployed as an underslung equipment skid on a work class ROV and is powered from the ROV’s auxiliary power.
The 100hp SUB-JET 3000 produces 7.5 liters per minute of 3900 bar ultra-high pressure water for cutting and blasting. It carries 35 liters of abrasive, providing 30 to 90 minutes of cutting time. The ROV provides hydraulic oil to power the waterjet intensifiers and operate attached tooling, 24 Vdc (300 watts) for control power, and a fiber optic data link to the topside controller. The system requires between 150 and 200 liters per minute of hydraulic oil to run at full capacity but can be operated at lower output if the auxiliary oil is not available from any given ROV. Cutting and coating removal are still effective at lower UHP output, only at slower throughput rates. The system weighs about 500 kg on the deck and is neutrally buoyant with 35 liters of abrasive.
In addition to the SUB-JET 3000, Chukar also will exhibit its C-JET 3000 standalone subsea waterjet system. The C-JET 3000 has the same cutting and blasting capabilities as the SUB-JET but is deployed independent of the ROV and is equipped with its own 150hp SHPU, freeing the ROV for other functions. The versatile C-JET can be operated by a diver or ROV. Operable to depths up to 3000 meters (10,000 feet), the C-JET 3000 cuts steel up to 250 mm thick and blasts away coatings, corrosion and marine growth at pressures up to 3900 bar. Like the SUB-JET, the C-JET produces 7.5 liters per minute of 3900 bar ultra-high pressure water for cutting and blasting. It carries 35 liters of abrasive, providing 30 to 90 minutes of cutting time.
