Scope of work
The scope of work was to support the re-activation of the vessel and prepare a Closed Ring DP FMEA for the drillship “Tidal Action” ex “West Libra to achieve EHS-E Notation, witness the trials and document the results.
Challenges
The vessel had originally been designed for open bus operation, so the key challenges were:-
- To identify the changes necessary to achieve Closed Ring EHS-E notation,
- Review the proposed ABB and KM Test Procedures and agree a test procedure to minimize duplication and duration.
- Witness the proving trials.
- Witness Live short circuit testing.
- Witness live earth Fault Testing.
- Witness Live testing of Arc detection protection.
- Responded to all requests from Brazilian operators, “Constellation” in order to clear any Petrobras concerns.
Outcome
Two surveyors attended the trials in Korea, and all tests were successfully carried out. All documentation was produced for the vessel in accordance with the most recent industry standards including IMCA, MTS and OCIMF and was approved by the vessel’s Classification Society. Following the trials, the vessel mobilized to Brazil and successfully commenced her charter.



