The company operates globally from its head office in Aberdeen, Scotland, and runs a fleet of four ultra deep-water drillships and three mid-water semi-submersible drilling rigs. One of its mobile offshore drilling rigs is the Stena Clyde, a UK-registered AKER H3 designed semi-submersible, twin pontoon, column-stabilised platform unit. The vessel was commissioned in 1976, and modified in 1985, 1997 and 2015. It is designed for offshore drilling and gas well-testing operations at water depths up to 2700 metres.
Advitech was invited to undertake the hazardous area classification of the Stena Clyde. Stena Drilling selected us because of our extensive process engineering and hazardous area classification experience. Advitech’s approach was proactive from the start, with a site visit to the drilling rig while it was in Singapore undergoing maintenance work. To ensure a high quality of work and understanding of drilling processes, two of our highly experienced process engineers attended site activities and client consultations.
The method for applying various hazardous area classification standards was agreed early in the project. After consultation with Stena Drilling staff, it was agreed that four core standards relating to hazardous area classification would be applied – one international, two industry-specific, and one Australian.
The site inspection took place over several days, and included face-to-face consultations with all operation managers on the rig. In many instances, site experiences enabled our engineers to make more accurate determinations of hazardous areas. In some case, this minimised or removed regulatory equipment protection in certain locations of the drilling rig.
We quickly analysed on-board information and assertively pursued gaps with the objective of closing-out issues before disembarking. Advitech’s strong process engineering knowledge enabled a timely review of technical data, especially PIDs. After inspections were completed, we used the information obtained to complete the assessment and prepare a report incorporating full details of the hazardous area classification and recommended actions.
For more information on this case study, or to enquire about a similar project please contact:
Dr Carl Fung – Lead Engineer, Process & Sustainability | Advitech
+61 2 4924 5400