Deepwater subsea waterjet technology provides an opportunity to prepare for tier 2 and tier 3 oil spill emergencies and has been developed to enable safe, efficient and reliable means of addressing common subsea maintenance and repair operations.

Deepwater subsea waterjet technology extends well known surface-based waterjet techniques into the deepwater subsea space. It was developed in response to the Deepwater Horizon oil spill incident and is directly applicable to subsea emergency response situations. Several benefits resulting from the physical embodiment of deepwater subsea waterjet equipment make it desirable as a replacement to other traditional cutting equipment systems.

Inclusion of deepwater subsea waterjet cutting and blasting equipment in the group of normal maintenance and emergency response related assets proactively addresses several potential problems associated with other cutting methods. The equipment also opens several opportunities to enhance safety and efficiency of subsea maintenance and repair operations.

Problems:

  1. Limited ability to respond to tier 2 and tier 3 oil spills and/or oil and gas incidents resulting from exploration and production activities in deep and in ultra-deep water.

  2. Fire and explosion hazard when cutting into active flow lines.

  3. Risk of support asset entrapment when cutting loaded beams and support structures.

  4. Large mechanical stresses incurred when removing weight coating from flow line.

Opportunities:

  1. Increased diver and asset safety during routine and emergency response operations.

  2. Higher efficiency in decommissioning and maintenance activities.

  3. Acquire and prepare highly effective emergency response assets.

Diver and ROV safety is enhanced because the tool in a waterjet system cannot bind in the cut to cause entrapment of the asset thereby jeopardizing asset integrity. It also eliminates the gas pocket ignition hazard associated with some mechanical and thermal cutting methods. The equipment is operated via a single tether (umbilical) to reduce complexity and hazards aboard the deploying asset such as dive support vessel or production platform.

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