SubNet Services
offer its
Micro ROV VideoRay Package with various tools and Mapping Software
for
for Inland Sites

 

USES: Dam Inspection, Coordinate Mapping of Damage, Reporting and Recording Underwater NDT Pipe and Metal Thickness Gauging (without removing protective coatings) Safety Corrosion Monitoring of Pipelines and Storage Vessels Metal Thickness Wear Checks on Jetties, Dock Gates, Piers, and Pilings Inspect Underwater Construction and Repairs Obstructions Corrosion Locks Powerhouses Inspect crest gates

Intake structures Bulkhead and stop log recess areas Culverts Reservoirs Internal Water Towers and Tanks Bridges, docks and harbors Outfalls Nuclear Industry Security and Surveillance Maintenance and Safety Checks on Bridges. Carry out underwater cathodic protection potential measurements in a wide range of applications including production and drilling platforms, shipsí hulls, jetties and other marine works.

ROV with Thickness Guage

SubNets VideoRay ROV Dam Inspection Service

Small, fast and efficient mobilisation, small footprint and transported by one person in the back of a vehicle or helicopter makes the SubNet Services VideoRay ROV and mapping software extremely cost effective for Dam Inspections.
We can import the drawings of a Dam or part of a dam or structure and map the course of the Dam inspection on our computer recording and displaying on the drawing the exact coordinates of the damage and/or inspected areas. This enables fast reporting and even faster return to any mapped location for repair with pinpoint accuracy. All inspection and talk over can also be recorder to video and or CD Rom as part of the inspection report record.
Reinspection of repaired areas is also much more efficient and cost effective because of the speed of mobilisation and accuracy of locating repairs by a smaller team as would be usual.

Human dives are expensive and hazardous. The costs of accidents are tremendous. SubNet Services perform routine and emergency inspections with the SubNet VideoRay ROV (remotely operated vehicle) system and avoid the paper work costs and logistics of dive operations. SubNet inspects underwater construction, repairs, obstructions, and corrosion. Subnet can operate the VideoRay system from a raft, small boat or land. The VideoRay has proven itself in a range of both routine and emergency inspections.

SubNet VideoRay and mapping system can inspect underwater construction, repairs, and corrosion more often than with divers. We can spot problems sooner, and avoid the usual dive hazards, paperwork, and logistics of diving operations.

Example:

an erosion area in a culvert system had been discovered and repaired during a scheduled de watering of a high-lift navigation locks. Inspection of the area was required frequently (three-to-six months) during operation to see if the repair stayed in place. Bids for divers to inspect the repair were extortionate and it would be a hazardous 175-foot penetration dive.
In the above example SubNet using its VideoRay System and mapping software would make it possible to inspect the area easily and efficiently and as often as required, with no hazards, by a small team and at a fraction of the cost.

Useful also for locks, dams, and powerhouses to inspect crest gates, intake structures, clear bulkhead, stop log recess areas, and to inspect navigation hazards.
SubNets Mini Rov VideoRay can't replace divers for everything. They can be difficult to control in a strong current.
But even when divers must go down, the system can be used as a safety scout to spot and warn them of hazards.
SubNet using VideoRay is able to provide the opportunity to inspect and prepare for diving operations, provide quality control and inspection after diving operations, and save money in the process.

SubNets VideoRay ROV Inland Survey and Inspection Service:
Shallow Water Surveys

SubNets VideoRay Rov system is easily transported to culverts and inland sites and can be powered from a 12 volt car battery, small generator or local power source. The SubNet VideoRay Rov excels in inspections because it is significantly lighter, less expensive, and more maneuverable and compact than most other ROVs. Its small thrusters do not create turbidity by agitating sediments. Operable in any visibility, the VideoRay gets into tight spots to document the condition (even take metal wall Thickness Measurements) of pipes and other structures in situ to examine condition, debris, and function.

Example:

Recently a VideoRay ROV was used to conduct a condition survey of the culverts, which connected a pump station, and it's surrounding reservoirs. The network of inter-connected reservoirs in the Hertfordshire countryside forms the basis of the system to maintain the water level in the Grand Union Canal. The original Wilstone Reservoir was constructed in 1802 and quickly followed by construction of the Tringford and other reservoirs within 25 years, probably due to an under-estimation of required water capacity to maintain the then busy canal traffic. These three water sources, now a tranquil bird sanctuary and recreational area, are still today linked together by a network of brickwork culverts that remains virtually unchanged from the original construction.

It was necessary to perform the inspection of several hundred meters of enclosed culvert. The VideoRay was used in sections of the culverts inaccessible to divers. Good use was made of its high power video camera, lights, three axial thrusters and a neutrally buoyant tether all controlled from the surface and 'flown' down the culvert. The colour CCD camera, which can be panned and focused from the control panel, provides standard video output, which is viewed on a monitor and stored on a conventional videotape recorder together with verbal commentary from the engineer.

The initial observations from the survey show that, with the exception of bottom sediments drawn in over time by the intake flow, the condition of the brickwork culverts remains in remarkably good condition for workmanship, which is nearly two hundred years old.

Previous attempts to inspect the culverts had been made using a ROV machine designed for use in the North Sea, apart from being too heavy and large for the job, its powerful thrusters created turbidity by agitating sediments, the subsequent poor visibility prevented the capture of any useful video record without waiting long periods for settlement.

SubNets VideoRay Surveying Long Sea Outfalls

SubNets new tool VideoRay Rov is significantly lighter, less expensive to hire, and more maneuverable than many other ROVs.
It is easily deployed from a small vessel. Further, the VideoRay's size -just eight pounds and 9in W x 14in L and 8.5 in high - lets it enter pipelines and confined spaces for detailed visual inspections.
With an attached tool SubNet can even measure Pipe or Metal wall thickness without removing the protective coating.
Recently a VideoRay was used for surveying long sea Outfalls. VideoRay viewed pipes in situ to examine condition, debris, and function. "Launched from a small (8 metre) trailable survey boat. Normally a larger boat would have been needed to accommodate a conventional ROV, at a larger mobilisation and demobilisation cost.

SubNets VideoRay Rov, Mapping Software and Thickness Gauge can be extremely useful for finding and recording pipeline damage location and to take Wall Thickness readings and recording to CD Rom for reporting.
VideoRay has also been used to inspect the deteriorating concrete columns and structures of a reservoir enclosed by a roof. The only access in was through a manhole, and health and safety regulations prohibited sending a man in to visually inspect. One of the main advantages of VideoRay is how easily it gets into inaccessible places.
In this case it was into a tight spot and minimized the risk to humans.

The SubNet VideoRay ROV can also be used in waters with high chlorine or other chemical levels that would endanger divers. VideoRay is also useful in the water to handle projects where there is a danger to divers due to moving parts, such as the inspection of lock gates.

SubNets VideoRay Water Tower and Tank Inspection Service:

SubNets VideoRay and Thickness Gauge is effective for inspecting potable water tanks - without the use of divers and from outside the tank. Using the VideoRay eliminates the risk of human contamination or unsafe conditions. The submersible swims through the tank and surveys the roof, seams, standpipes, and cables as well as possible Thickness Measurements. The camera eye captures footage while robotic grippers take samples of corrosion. The VideoRay allows tank inspections to be safer, more affordable, and more frequent while the budget goes further.

Example:

With its two headlights beaming, the 8-pound sub heads down a 3-foot wide section of standpipe. Colonies of corrosion that look like a coral reef wave out from the interior steel like a scene in Titanic. The tank being inspecting could have been the place you got your last glass of drinking water.
Who has been swimming in your drinking water?
SubNets VideoRay System can inspect record and report from outside the tank, SubNet inspects the water tanks fast and efficiently without risk of human contamination or unsafe conditions.
How often do you need to inspect?
Its now Easier, More efficient, more cost effective and safer with a better more thorough reporting and video record.

Sending divers into drinking water tanks has long been the practice for inspecting the structures. But it is dangerous and can pose health risks. Now, town and city engineers can make use of SubNets VideoRay ROV (remotely operated vehicle) to co-exist with divers and make tank inspections safer, more affordable, and more frequent.

Once inside, the VideoRay can get into tight spots divers can't, even far inside a standpipe.
SubNets VideoRay ROV completes survey of seams, cables, and pipelines. All recorded through the VideoRay's camera eye on videotape and DVD for review by engineers.

The Benefit The Complete Packag ready to Mobilize Small, rapid and efficient mobilisation and deployment, small footprint (The entire system weighs less than 70 pounds and packs neatly in two rolling Pelican cases that can be carried in a car trunk or helicopter, or checked as airline baggage and transported by one person) makes the SubNet Services VideoRay ROV offshore inspection package and attachments such as a Thickness Gauge extremely cost effective, for those quick one off jobs, or even feasible now as a low cost permanent stand by service.

Quick Hire SubNet can hire the system with or without Operators who may if required also be CSWIP Inspection Qualified. Attachments for Metal Thickness Readings, Sonar and Mapping Software. High Resolution Camera DVD Picture, Position and Depth Recording - Engineer Talkover