With the experience gained from many inspections in both the North Sea and the Gulf of Mexico, GUL’s Subsea GWT equipment has evolved into a reliable modular system.
GUL Subsea rings are easily adjusted to fit different pipe sizes, and are available for both ROV or diver deployment.
The advantages of using the Sub-Sea rings include:
- Screening unpiggable sections of line for internal or external corrosion/erosion.
- Screening under weight coat and insulation with minimal cleaning and excavation.
- On-site analysis allows the ROV to perform follow up indications.
A Subsea G4mini is mounted on the ROV. A hydraulic connection is used for opening and closing the ring. The test is carried out from the ROV control room.
The test is controlled via an umbilical from a topside interface box to the Wavemaker instrument. The rings are installed on a clean section of pipe by 1 or 2 divers using a mechanical clamping mechanism.