NPCC OFFSHORE, INDIA

The design and modeling of the structure was done with the Tekla Software right from the early stage. Modeling began with the main steel & secondary steel structure as soon as the calculations were completed with SACS. The model is completed later with all the tertiary elements such as the connecting plates, equipment supports, access platforms, padeyes, stiffeners, node plates, cut outs and penetrations as the vendor information was made available. The robustness of the software in dealing with the changes was beneficial in the overall smooth execution of the project.

This project is a new well head platform which is supported on four legged fixed jacket structure with two legs having single batter and other two legs have double batter. Jacket is made of tubular sections, welded together, and it is anchored in seabed with main/skirt piles. Jackets have spider deck at top level and have diagonal bracing in all faces connecting horizontal framing levels. It also includes boat landing, buoyancy tank, anodes, riser, skirt pile guide and lifting/upending trunnion etc. Maximum jacket weight is 2100MT.
The platform top side consists of sub-cellar deck, cellar deck, main deck and aluminium helideck. Top side also includes building module, vent boom, crane pedestal, solar panel supporting platform, well head access platform, walkways, stairways, ladders and railings. Maximum topside weight is 1900MT.

falseThere was need to have 3D software to handle their all structural needs start from concepts to engineering/detailing/fabrication to erection. After extensive evaluation and anticipating upcoming challenges NEL decided to switch from traditional 2D based platform to 3D BIM based process & technology. Their obvious choice was Tekla and they decided to implement the software in this fast track green field well head platform project.

The leading offshore company NPCC Engineering Limited (NEL) is a joint venture of NPCC, Abu Dhabi and Arcadia Shipping, Mumbai, carrying out design and engineering activities for oil and gas upstream industry. NEL’s Quality Management System (ISO 9001:2008) is certified by BUREAU VERITAS and it has carried out several design and engineering projects of new well head platforms, subsea pipelines and topsides modifications on well head/process platform.

NEL structural design team worked based on the requirements of client and came up with relevant technical and design issues to be developed and incorporated in the Tekla model. Tekla technical support team and NEL design team worked together during development and customized few tools as per the project requirement. Although the project had time constraint, NEL managed to achieve defined results in relatively short period with the help of versatile Tekla software and the excellent implementation support provided by the Tekla team. In the process of project execution Tekla local support team got valuable feedback on a few small requirements of offshore industry incorporation. This can further fine tune Tekla offerings to all offshore players.