Description

Subsea GWT

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.
Request a quote
ROV Deployed

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.

Diver Deployed

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.

Specifications ROV

Number of Channels
12
Nominal Pipe Size (NPS)
6” to 10” (DN 150 to 250)
Operating Depth
Down to 3,000 msw
Transduction System Compatibility
Wavemaker® Subsea G4mini only

Specifications Driver

Number of Channels
12
Nominal Pipe Size (NPS)
4” to 26” (DN 100 to 650)
Operating Depth
Any diver depth
Transduction System Compatibility
Wavemaker® G4mini ( < 50m depth) Subsea G4mini ( > 50m depth)

Related products

Wavemaker® G4mini

The Wavemaker® G4mini system is designed to quickly inspect 100% of the volume of long lengths of pipelines from one position. The Wavemaker® G4mini offers…

WavePro4 Software

The WavePro4TM guided wave analysis software runs on a Windows® based operating system and interfaces with the Wavemaker® G4 and G4mini instrument. The software assists…

Compact Rings

The Compact® rings are designed to be lightweight and low profile while still providing excellent results. This makes them the default solution for most applications….

EFC Inflatable Rings

These transducer rings are designed to provide effective inspection capability, particularly for larger diameter pipes. Pneumatic pressure is used to press transducers modules (which are…