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UWILD service completed during drilling operations. No Divers. No shipyard. No out of service time.

Rig Design
BM 200 H
Delivered 1982
Offshore Saudi Arabia
SPS No.8

The Challenge

Westerton Access was tasked to complete a UWILD associated to SPS on a jack-up rig in full offshore drilling operation, without downtime or the use of divers.

Traditionally, this inspection would be carried out by removing the rig from service and transferring it to a shipyard or sheltered water area. Divers would be deployed to clean, visually inspect and MPI the critical welds. MPI would require the protective paint to be removed from the weld prior to inspection.

As the UWILD was associated with SPS, visual inspections would need to be carried out inside the spud cans. Doing so with conventional man entry requires the spud cans to be opened and ventilated to reduce the risk of human contact with deadly H2S.

Each element of the work scope would need to be replaced with an alternative method to allow for the project to be completed without divers or downtime.

The Solution

Using specialist equipment including our unique eddy current NDT system, Westerton Access designed a method that would allow for all work to be carried out by a small ROV, without any rig downtime or divers.

All cleaning, visual inspections and weld testing NDT was done by the ROV and a Westerton Access team on the rig.

Our eddy current NDT resulted in the welds being tested without removing protective paint.

Internal spud can inspections were carried out by the ROV without having to drain or ventilate them. This removed the potential human risk associated with this inspection.

The following work was carried out by Westerton Access: CVI and NDT of can to chord connections CVI and NDT of bracing connections in way of upper guides Visual inspection of internal areas of all spud cans Visual inspection of all external spud cans, including the undersides

The Result

Westerton Access designed a new inspection method that allowed the rig to remain in full operation without any downtime or diver assistance.

Our solution was a safe and cost-efficient method for conducting this traditionally costly and inconvenient inspection requirement.

Avoiding the need for divers eliminated the potential for human risk. Removing the requirement for out of service time for the routine UWILD inspection ensured no loss of revenue for the rig owner, no shipyard or vessel charges and no delay to the drilling program.

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