Equinor, a North Sea, required an of a subsea pipeline used for transporting gas and gas condensate from a subsea template to a platform that was essential to the company’s ongoing operations. To assess the conditions of the critical parts of this asset, which had never been inspected, 720 m of 10" diameter flexible riser and end fittings needed to be examined.
The flexible riser starts at the platform and descends 322 m (1056 ft) to the seabed, where it connects via end fittings to a 6.5 km (4.04 mi) long, 10" diameter subsea pipeline and ends at a subsea template. Due to the system layout, a bi-directionaltool was required to complete the inspection.
To obtain reliable data about the condition of this pipeline section, the chosensolution must be capable of performing a high-resolution measurement of the pitch between the carcasses throughout the length of the riser, and the critical end couplings, as well as the end fitting positions.