Videoray - News - July 20, 2004
VideoRay North Sea Inspection Challenge
Buccaneer Ltd have supplied 2 VideoRay Pro2 Micro-ROV
systems to Stolt Offshore in Aberdeen.
The VideoRay vehicles were supplied complete
with Tritech Micron sonar systems to aid navigation,
and were fitted with micro-manip grabbers and
impact protection cages. Following full system
integration and configuration at Buccaneer's Aberdeen
workshops, the systems were subjected to a range
of trials and acceptance testing at Stolt Offshore's
test facility at the National Hyperbaric Centre.
During several days of system testing, ROV pilots
from Stolt Offshore had an opportunity to become
familiar with the characteristics of the tiny
vehicle, and using a scale mock-up of the structure
to be inspected, started to appreciate the agility
of the VideoRay ROV.
Following the successful trials, the the miniature
ROV systems were mobilised to the worksite and
used to conduct an internal inspection programme
inside the offshore structure. The structure,
at a water depth of approximately 120m, has restricted
access and consists of a number of interlinked
concrete chambers. The task assigned to the VideoRay
ROV was to carry specifically designed measuring
tools into the structure, to deploy these devices,
one to each chamber, and then to read off the
measurement displayed on the tool. The tools were
designed to be left in situ, and can be re-visited
later in the programme, if required.
The water conditions offshore dictated that the
Videoray ROV hitch a ride to the worksite from
a larger underwater vehicle. A deployment basket
was designed by Stolt Offshore to transport the
vehicle to the worksite, and provide a ready-use
storage rack for the measurement tools. The VideoRay
secured and released itself to-and-from the deployment
basket using the micro-manip grabber.
Once on station, the larger ROV delivered the
VideoRay to the access point of the structure,
a 60cm opening. From this point on the VideoRay
vehicle was on it's own, and progressed through
the concrete honeycomb of the structure completing
a detailed video survey.
A Stolt Offshore spokesman commented, "the
VideoRay vehicle performed well in demanding conditions.
Our client now has the information they need and
is very happy".
All Photographs courtesy of Stolt Offshore Limited