Chukar Waterjet introduces new subsea waterjet system for work-class ROVs

Chukar Waterjet Inc. will introduce its new SUB-JET 3000™ ROV-attachable waterjet system at the OTC Offshore Technology Conference, 2-5 May in Houston.

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 m, 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 l/min of 3900 bar ultra-high pressure water for cutting and blasting. It carries 35 l of abrasive, providing 30 to 90 min of cutting time. The ROV also offers hydraulic oil to power the waterjet intensifiers and operate attached tooling, 24 Vdc (300 watts) for control power. The system requires between 150 and 200 l/min 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 l of abrasive.

Chukar’s powerful underwater waterjet cutting and blasting systems have been designed to improve the safety and effectiveness of subsea operations.

Chukar’s subsea waterjet equipment has numerous applications for deepwater emergency response operations, salvage operations, and rapid de-mobilization operations. Chukar systems quickly blast away even the toughest coatings, including three-layer polypropylene (3LPP), and provide a safer, more effective method for cutting multi-string casings for well severance. Waterjetting equipment also may be used to provide turbulence in a stream of methanol for hydrate remediation, an application Chukar developed in emergency response to the Gulf oil spill, when the company was asked to rapidly manufacture a system to clear a clogged containment system 1500 m underwater.

Edited from press release by Angharad Lock

Read the article online at: https://www.oilfieldtechnology.com/product-news/02022016/chukar-waterjet-introduces-new-subsea-waterjet-system-for-work-class-rovs-2018/