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Audit - technical safety on Transocean Leader

Transocean Offshore has applied for an Acknowledgement of Compliance (AoC) for the mobile rig Transocean Leader (photo). As part of the consideration of this application, the Petroleum Safety Authority Norway (PSA) conducted an audit of technical safety on the drilling rig on 1 April 2004.


Transocean Offshore has applied for an Acknowledgement of Compliance (AoC) for the mobile rig Transocean Leader (photo).

As part of the consideration of this application, the Petroleum Safety Authority Norway (PSA) conducted an audit of technical safety on the drilling rig on 1 April 2004.

The audit was aimed at management systems and technical factors in the field of technical safety, and it was implemented through conversations and verifications on board during the period when the rig was in the Westcon yard in Ølen.

Background for the audit

Transocean Leader is a semi-submersible mobile drilling rig delivered in 1987 from Hyundai Heavy Industries in Korea.

The rig has been engaged in operations on the British Shelf until December 2003. It is being prepared in Ølen, with planned start-up of drilling activities on 1 May 2004 for Norske Shell on production license PL255.

Transocean Offshore (TO) applied for an (AoC) for the rig in December 2003.

A number of upgrades are being performed on the rig during the yard work in Ølen. Some of this work is being done to meet regulatory requirements, and it is a precondition that this work be completed before start-up of activity on the Norwegian shelf.

Purpose of the audit

The objective of this activity is to verify whether management and technical factors in the field of technical safety on Transocean Leader comply with the regulatory requirements.

The verifications were performed vis-à-vis the information in the company's AoC application.

Result of the audit

The planned modifications of Transocean Leader will help enhance HSE factors on the rig.

A comprehensive program of maintenance and testing of systems must be performed before the rig is ready for operation. TO plans to implement such a program during the last six weeks of the rig's stay in Ølen.

In relation to the application, new non-conformances have been discovered in the areas of maintenance, implementation of training/drills and fire detection.

Work is underway on installation of automatic dampers on the installation. This non-conformance was not identified in the application.

Additional non-conformances have also been identified in relation to remote control and placement of foam monitors on the helicopter deck, permanently mounted fire extinguishing systems in the shale shaker room and mud tank rooms, as well as the fire extinguishing system in the engine room.

We have also identified some items for improvement listed in the report.

Contact person in the PSA:
Mike Theiss

Contact person in the PSA:
Mike Theiss