Wellhead Load Relief (WLR) System

The mechanism responsible for pretension the ropes is the Linear Rope Tensioner (LRT), designed with the ability to consistently retract excess rope length before the final tensioning process. This innovation introduces the flexibility to adjust the length of rope required for each tension line, eliminating the necessity for multiple adjustment lengths and consequently streamlining subsea rigging processes.

The LRT offers two distinct configurations for initial tensioning. The first involves utilizing a lift line from the surface through a snatch block, while the second employs a hydraulic-operated tensioning unit mounted directly on the LRT. The latter configuration is entirely remotely operated vehicle (ROV) controlled, making it particularly well-suited for applications in shallow water or locations inaccessible from the rig. This versatility enhances operational efficiency and expands the scope of applications for the Linear Rope Tensioner.

The integrated load monitoring system ensures that the remotely operated vehicle (ROV) can effectively monitor and adjust tension forces as needed. The Linear Rope Tensioner (LRT) facilitates seamless interfacing with various anchor points, whether on templates or the seabed, offering a rotational range of 360 degrees. Notably, the upward direction in which the rope exits the LRT mitigates any potential clashes with surrounding structures.

The BOP tethering system is comprised of multiple LRTs, each individually tethered to the Blowout Preventer (BOP). Determining the quantity and anchoring coordinates of the LRTs involves analysis of the system to optimize the system efficiency. Additional optimization considerations encompass loads on existing infrastructure, well properties, and soil conditions. Importantly, the system exhibits adaptability to different BOP designs, enhancing its versatility and applicability in various offshore scenarios.