The waterjet intensifier skid is lowered over the side of a vessel similar to the way an ROV is deployed. An umbilical cable that includes electrical power and communications lowers and raises the skid in the water.
The C-Jet 3000 waterjet is lowered into the water, much like an ROV.
In shallow water cutting applications, a diver positions the waterjet cutting tools. Once the tooling is in place, the waterjet cutting equipment is operated from the surface with the diver out of harm’s way. In shallow water cleaning applications, the diver manually directs the cleaning tools underwater.
In deepwater cutting application, an ROV positions the waterjet cutting tools. Once the tooling is in place, the waterjet cutting equipment is operated from the surface with the ROV out of harm’s way. In water cleaning applications, the ROV’s robotic arm directs the cleaning tools underwater.
The system is capable of cutting virtually any material, including 250 mm steel.
The system also can blast at pressures up to 3800 bar. In this photo, the waterjet is used to blast away hydrate ice crystals that were clogging a containment system during the 2010 Gulf of Mexico oil spill.
UHP Water Jet Technology Explained
Chukar Waterjet's Deepwater Subsea waterjet skid pressurizes sea water up to 55KPSI (3800 bar) with a hydraulic waterjet intensifier pump. In underwater cutting applications, an abrasive slurry is typically added to the water stream, creating an abrasive water jet (abrasivejet) capable of cutting virtually any material, including steel up to 250 mm thick. Water-only waterjets can be used underwater cleaning applications or for cutting soft materials. Methanol can be used instead of seawater for hydrate remediation applications.