ROVs

ROVs

Protect your subsea cable installations using state-of-the-art technology

Protecting expensive subsea cables takes specialist tools and knowledge to ensure your cables are afforded the best protection possible within any environment.

To do this, we select one of our Remotely Operated Verhicles (ROVs) best suited to the task, and choose the best team for the job.  Generally we recommend a simultaneous operation to dig the trench and lay the cable to minimize time and costs, and to reduce any risk of damage to the cable.  Subsea trenching is always time-sensitive, and we take great care to perform it properly, with highly skilled teams equipped with the right tools for this demanding and essential job.

XT600 | Atlas 1 | Atlas 2 | ST200 Series | Videoray



XT600 Trenching System

The XT600 is the latest evolution of subsea cable maintenance vehicles. It is a purpose-built system that allows Global Marine to significantly enhance performance across the full range of demanding subsea cable maintenance, trenching and survey work. With 600HP, the XT600 buries subsea cable up to 3m deep, and in water depths up to 2000m.

Key Features

  • Powered by 2 x 300hp motors; Vehicle Dimensions (LWH) 5.3 x 3.6 x 3.2m
  • Light compact frame design, with strength capability that allows operations in up to Sea State 6
  • Operates in tracked and free-fly. In free fly mode the tracks are removed and skids fitted for weigh reduction and hydrodynamic efficiencies
  • Trenching assembly with two independent jetting arms, interchangeable nozzles and a cable depressor. Multiple arm and nozzle sizes for varying soil conditions and jetting depths
  • Control System utilises Evolutionary Integrated Control Engine with fully redundant HMI Computers. Pilot has independent control, position information and force indications; capable of small adjustments in yaw to provide more rapid engagement with the cable
  • State of the art Cable Locating System (CLS) operates with active and/or passive techniques to provide constant cable and pipe location data
Back to the top

Atlas 1

Atlas 1 is a powerful, state of the art cable working ROV, designed for both cable maintenance, post lay and inspection roles. With 300kW of installed power, Atlas 1 has substantial cable intervention and burial capability and a range down to 2000m water depth.

Key Features

  • Purpose built deployment and recovery mechanism with umbilical snatch limiter
  • Permanently attached 'Linksyn' flotation ensures decreased launch and recovery times
  • Comprehensive range of fore, mid and aft positioned burial tools
  • Unique Global Marine designed "Hurricane" water turbine jet tool for burial of standing loops and cable in sand areas
  • Modular/transportable self-sufficient remotely operated vehicle system
  • TSS Dual Track Cable detection and tracking system
  • Tritech Super Seaking obstacle avoidance sonar & seabed profiles
  • Two Shilling Orion 7 function manipulators
  • Cable cutter and cable gripper
  • Modular Jetting tool with independent depressor
  • Dedicated USBL Acoustic positioning system
Back to the top

Atlas 2

The Atlas 2 ROV is a powerful thruster controlled swimming / tracked vehicle capable of operating down to a water depth of 2000m.

The vehicle has a total power of 300kW (400hp) using a single motor, fitted with two variable delivery constant pressure oil pumps. In tracked mode, up to 250kW is available for jetting with the tracks operating at maximum power of 10kW. This leaves 40kW for the thrusters. In free fly mode with skids fitted, a typical scenario would be 200kW used for jetting, leaving 100kW for the thrusters. The operator manually adjusts the proportion of power given to the thrusters or jetting tools depending on operational requirements.

Key Features

  • Purpose built to give all thrusters a clear path for water flow maximising thrust and minimising power consumption
  • Conventional arrangement of four 500mm thrusters in the horizontal plane at 45° to the direction of travel
  • Four 380mm vertical thrusters to give control of pitch and vertical motion
  • Lightweight tracks that typically carry about 600kg of contact force resulting in up to 300kg of traction
  • Vertical thrusters are capable of lifting the vehicle, in the water column, with the tracks fitted
  • Tracks are removable and skids can be fitted instead
  • Main jet legs are designed to carry a relatively small number of large diameter jets
  • Main jet tool systems comprise two jet legs which swing down to provide depth control; both legs move in and out to locate on the cable and to pass repeaters and joints
  • Second jet tool is mounted at the front of the vehicle
  • Eductor (jet pump) can be fitted to the ROV arrangement using the current water supply without compromise to the core ROV or major increase in system weight
  • Cable tools suite is provided for cable work including cutting, clamping and general manipulation tasks
Back to the top

ST200 SERIES

The ST200 series of free swimming remotely operated vehicles has established the benchmark for modern cable working ROVs. This flexible system can operate in both free swimming and tracked mode. Depth rated to 2,500m and with a 1m burial tool, this package can provide a cost effective solution for all subsea cable tasks.

Key Features

  • Full surveillance suite (six cameras)
  • TSS 340 and 350 ‘dual track’ cable tracking system
  • Twin 100HP pour pole hydraulic power packs
  • 1m jetting tool with depressor
  • Armoured cable cutter and gripper
  • Survey quality depth sensor
  • Automatic heading control from onboard gyro or cable tracking system
  • Single mode fibre optic umbilical
  • Removable quad track drive system
  • High power twin USBL system
  • Digital sonar
  • Additional sensors and tool packages can be easily installed
Back to the top

VIDEORAY

The Video Ray is a micro inspection class of ROV. Its robust design and powerful thrusters enable it to be used in a variety of operations in both the offshore and inshore working environments. It can operate with speeds of up to 4.1 knots making it a very capable system.

It’s modularity and compact design in terms of vehicle and support equipment means it can be mobilised anywhere in the world at short notice and is easily one man portable. The ROV can easily accommodate recording devices, modular instrumentation and tools such as:

Key Features

  • Scanning imaging sonar for low visibility environments;
  • Manipulator for object retrieval or intervention;
  • Positioning system for exhaustive area searches;
  • Water quality sensor, metal thickness gauge, and more.
Back to the top

RQHSE