|
|
|
|
|
2008 Software for assessment of strength of jack-up drilling conductors issued to client An extensive MATHCAD calculation package was issued to a client so that he can perform his own strength assessments for jack-up drilling conductors. The software includes a natural frequency calculation which is based on recently published work by Ochoa and allows the effects of end masses, gyradii and flexibility of the top restraint to be accounted. The calculation checks for vortex induced vibration and makes an appropriate allowance, warning the user if more extensive study is advisable. 2008 Reliability analysis of offshore jackets and comparison with fatigue life factors A reliability analysis was implemented for the assessment of fatigue life of the joints of offshore structures. The probabilities of failure were compared with the design fatigue life factors obtained when using both API and UK DEn SN data. These results are used to help prioritise planned jacket inspection programmes. 2008 "Maintenance and Inspection of Topsides Facilities" This document was issued to Shell together with an independent review by a former inspector from the UK HSE, organised by PAFA. For further information and background, click here. 2008 Stranded vessel re-floated Structural modelling study by PAFA correctly predict the structural response of the damaged, buckled hull of a container vessel when it was re-floated. 2007 Standardised approach to topsides inspection and maintenance A draft document on the above topic was prepared for Shell to apply to their topsides structures around the North Sea whether under Netherlands, Norwegian or UK regulatory regimes. 2006 Strength and fatigue assessments of free-standing drilling caissons Design assessments of jack-up drilling caissons are examined to determine whether they can be left free-standing until a production unit is brought on site. Wave and current conditions are relatively benign but study reveals that beyond a certain depth, it will be necessary to tie-back the top of the caisson to the seabed using a guyed support frame. The potential for vortex induced vibrations is taken into consideration. 2006 Environment Agency name a new river dredger PAFA staff attend naming ceremony for the ThamesWey at Dapdune Wharf in Guildford This followed acceptance trials for the vessel on the River Wey, after delivery and lifting into the water at Penton Hook Marina on the river Thames. PAFA's Sandy Fyfe acted as project manager for the EA on this project from preparation of concept and specification through detailed design and fabrication. He also also organised issue of the operations manual and participation of Environment Agency staff in pre-delivery and vessel familiarisation trials with the staff of Richards Dry Dock and Engineering on the Norfolk Broads, click here.
|
