[Experts] ***SPAM*** FW: Eelume the snake robots, Pros and Cons

Odido, Mika m.odido at unesco.org
Mon May 16 11:05:31 EAT 2016 

interesting developments!




Mika Odido
IOC Coordinator in Africa
IOC Sub Commission for Africa and the Adjacent Island States
UNESCO Regional Office for Eastern Africa
UN Gigiri Complex Block C
P.O. Box 30592-00100
Nairobi, Kenya
Tel: +254 20 7621244
Email: m.odido at unesco.org<mailto:m.odido at unesco.org>
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Sent: 16 May 2016 10:49
To: Odido, Mika
Subject: Eelume the snake robots, Pros and Cons



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Eelume the snake robots, Pros and Cons






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The snake robot is made by a Norwegian company called Eelume, which partnered with Norwegian companies Statoil and Kongsberg Maritime to fast-track production of these innovative subsea robot. Inventas has collaborated in the technology employed as well.
In addition to its expertise in submersibles and programming, the Kongsberg Maritime assist with navigation, battery technology, and industrialization of the concept. It includes sales, testing, purchasing and marketing of the product. Statoil will pledge with test facility. The plan is to test the snake robots in late 2017, on a Statoil fields in real situation.
The idea of snake robots development was initially popped up to reduce the subsea inspection cost. The Eelume robot is able to live on the sea floor and when it is needed it sneaks through the subsea structure where no other robots like ROVs can reach. The Eelume is able to do simple tasks like cleaning the fouling or tightening the loosen valves to some extent.








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Figure 1:To the left you see a prototype of the snake robot . The finished robot will be thicker to withstand deep ocean on the Norwegian shelf. The components on the right shows how thick the final robot will be. Notice aluminum joint that allows the robot can behave like a snake in the water. PHOTO: MARIUS LORENTZEN E24







Specifications


It has a cross-section of 180 millimetres and is made up of modules that allows length to be customized according to different needs.
The parts are made of aluminium, compatible with the depth of operation in Norwegian shelf.
Overall robot snake measuring about three to ten meters, depending on which modules or sensors are mounted on the robot.








Applications


The main point of snake robots is that they should be able to conduct subsea inspection. Easier maintenance work on the seabed is another application that the team is working on. It may include, turning the valves, check for any gas or oil leaks, visually inspect a pipeline for subsea asset integrity, and to clean and remove fouling of sensitive equipment on the seabed.
Snake robots are modular. It is possible to install various sensors, cameras and tools on the robotic snake, depending on the requirements of the operation.








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Figure 2:Eelume envisages that the snake robot can be equipped with tools to turn the valves or do other maintenance tasks . PHOTO: MARIUS LORENTZEN E24


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Figure 3:Small motors at the rear of the robotic snake to Eelume helps progress . PHOTO: MARIUS LORENTZEN E24







Advantages


  1.  The biomechatronics robot replicate natural motion along the cylindrical body segments, allowing for the access to areas previously not been available with traditional ROV equipment.

  2.  With built-in sensors and cameras, and with the ability to connect to various tools, the robot can be used for inspection and simpler maintenance tasks.

  3.  Both maintenance costs and mobilization time is reduced significantly if snake robots can be stationed on the subsea or subsea structures. This allows for both scheduled and ad hoc inspection and maintenance tasks, as well as rapid response to the planning and execution of the intervention.

  4.  The snake robot acts as a robotic arm without body. The biomechatronics structure with flexible joints and thrusters together with the hydrodynamic design allows the Eelume robot to navigate very smoothly in the water.

  5.  Eelume robot can be provided with an artificial intelligence software so that it can navigate and move even without remote control. This is an important step towards more autonomous underwater vehicles that do more than just inspection.

  6.  Instead of using expensive boats on smaller jobs, this technology is a kind of caretaker on the seabed.

  7.  The snake robots could improve the safety of the oil and gas field by efficientlyand cost effectively continues monitoring of the subsea assets.








Disadvantages


  1.  Energy efficiency in water is a challenging issue that will be developed overtime. For instance, strong currents and payloads could be quite a challenging issue for the snake robots.

  2.  The battery life and endurance are a remarkable limitation for the snake robots. Some of the maintenance tasks require power supply from the platform or vessel on the surface.

  3.  The snake robots could be trapped in the confined areas easily.

  4.  The snake robot's body and tail is exposed to the damages and could cause malfunctioning in the correct navigation and performance.

  5.  The snake robots could be attacked by marine wild life and destroyed easily.

  6.  The 180mm body diameter would not leave enough space for all kind of sensors.

  7.  The snake type movements of the robot will demand a very accurate motion sensors without latency to be used with survey and inspection sensors.

  8.  There are risk of getting entangled with subsea obstacles for the cable version of the snake robots who are going to be corded and connected to platform to nest subsea for a long period.








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