World's fastest ROV? - Project ROST - Norway Exports

Looking for a specific product?

Make a search for products & suppliers, articles & news.

World's fastest ROV? - Project ROST

Traditionally, all cleaning has been carried out from a workboat,

The team in Sperre ROV Technology did not hesitate for a second when they were asked if they wanted join a project to develop a super-fast ROV for the seismic company, Petroleum Geo-Services

Akvagroup Asa

The seismic company, Petroleum Geo-Services ASA (PGS), wanted a safer and more effective way to remove unwanted fouling from the outside of the GeoStreamers. As unwanted growth degrades the signals picked by the sensitive sensors inside the Geostreamer, effective cleaning is critical to ensure operational performance. They contacted Sperre, asking if they were interested in developing a super-fast ROV that could streamline the cleaning operation: Project ROST ("Remotely Operated Streamer Tool") was launched.

Today's cleaning method uses a so-called Streamer Cleaning Unit (SCU) that is manually attached and released at the start of the GeoStreamer. The waterflow drives the SCU backwards along the streamer in lengths up to 8km.

Traditionally, all cleaning has been carried out from a workboat, including the assembly of the SCU onto the streamer. For HSE purposes, PGS wanted to minimize the use of workboats. The solution fell on an operation consisting of an ROV and a LARS system.
- What was special about this project was that this operation required the ROV to be put into the sea at speeds up to 5 knots. This is very unusual, says Thor Olav Sperre. He then explains that it required innovating thinking in terms of design on both the ROV and the LARS system to deliver on the request, where the latter is developed by Lidan Marine AB in Sweden in cooperation with Sperre.

- During the spring 2013 we completed a prototype and tested the concept. After the tests, we found many answers as to how the final design had to be in order to achieve the desired speed, he says.

At the end of 2014, the final design began to take shape and new tests were carried out in Heddalsvannet, Notodden. All development in design (mechanical / electronics / programming) and assembly has taken place at Sperre's premises in Notodden. By 2017, PGS has conducted several tests at high speed to test the system to its fullest. The highest recorded speed was over nine knots! CFD analyzes have been used on hull and buoyancy components on the ROV.

- We have done CFD analyzes on the hull and buoyancy components in the ROV, and we have focused a lot on hydrodynamics to achieve this speed, concludes Thor Olav Sperre.

Akvagroup Asa

Associated companies:

Related news

Latest news

New trainee blog posts: Their final trainee rotations

Trainee Marthe’s time as an Elkem trainee is coming to an end.

A strengthened national powerhouse for artificial intelligence in Norway

Norway has a huge potential to be a pioneer in Artificial Intelligence (AI),

Servogear propulsion technology enable sustainable Arctic cruises

We are really happy to have Servogear on board,

Students develop "health check" to prevent cyberattacks

It is very rewarding working with cyber security,

DOF Subsea contract awards

DOF Subsea has been awarded a contract in the Atlantic region...

Invitation to Elkem’s second quarter and half year 2018 results presentation

The company will host a presentation at 8.00 a.m. 

DNV GL checks technical and financial risks of three Norwegian wind farms totaling 294 MW

Working alongside Norwegian developer Norsk Vind...

Sperre AS on National Geographic

Last autumn, National Geographic was on Lake Tinn in Norway...

DNV GL secures Shell Penguins contract

The Penguins field is in 165 metres (541 feet) of water,