In January 2016, SapuraKencana Well Services requested well intervention engineering support from Nautec to enable them to carry out a riserless light well intervention (RLWI) for a major operator.

The well operator’s tubing retrievable safety valve (TRSV) was inoperative in the closed position, presumed to be stuck rather than defective, thus preventing well flow.

The operational scope was to run a HD camera into the subsea well to check the TRSV operation then run an exercise tool on a high force actuator to manually operate, and free, the TRSV. The camera would then be run again to confirm valve operation.

The services carried out by Nautec included the development and review of project specific RLWI programme and operating procedures for Subsea Intervention Device (SID), Intervention Compensation System (ICS), fluid pumping, and slickline / electric-line operations.

Nautec’s on site Well Intervention Manager provided offshore supervision of SapuraKencana and third party supervisors, technicians and engineers on board SapuraKencana Constructor DP subsea support vessel and the engineering team carried out the development of Well Control Emergency procedures for subsea and vessel operations.

The Well Intervention operation was carried out in less than the Operator’s planned technical limit and the successful campaign brought a non-producing well back online.

To read more about this project please download the case history by clicking here.