Page 142

finishing by describing their BOP actuator systems and some of the issues associated with providing 330l of fluid in 45 minutes.

system. Projects described included replacement of a 150t load pin on a fairlead, cofferdam installation and crawler vehicle deployment.

The third of the evening’s speakers, Ian Murray, took the audience through a number of case studies which demonstrated his mantra that “with proper engineering design, everything is possible with an ROV”.

Two of particular interest, which saved their client considerable expenditure, were the replacement of a tubing hanger coupler, thus avoiding the recovery of the completion and associated rig downtime, and a detailed project involving ‘keyhole surgery’ on a manifold, which allowed the cutting out and replacement of a sand-eroded pipe elbow. This involved accessing the pipework by cutting a hole in the protective cage and deploying the

Ian explained the problem, the engineering involved and the solutions employed using both pictures and simulations from Fugro’s ROV training and engineering simulation

various tools through this, using a combination of jigs and associated bespoke tooling systems. Ian summed up the theme of the evening with his concluding remark that “ROV systems can perform any subsea task if the intervention tooling is well engineered and prepared”. Following the meeting, those attending retired for the buffet and drinks and to network. Thanks are given to the presenting companies, Schilling Robotics LLC, Forum Subsea technologies and Fugro Subsea Services Ltd for their sponsorship.

Perth Branch

Mighty Movers By Ray Farrier, SUT Perth Branch Vice Chairman Massive complicated offshore packages are built onshore and then delivered and sometimes installed by specialist vessels. The three presentations of the ‘Mighty Movers’ evening meeting looked at the numerous complications involved in the process of delivering and installing such packages. The audience of approximately 140 people were presented with three very informative and different papers: 1. Heavy Lifting in Ultra Deep Water: Challenges and Future Technologies, presented by Jeroen Kock, BDM Jumbo Offshore 2. Floating, Drilling and Production Assets for Deepwater Locations, presented by Ben van der Hoeven, Area Manager Australia, Dockwise Shipping Australia Pty Ltd

website (http://www.sut.org.au/perth/ sutau_perth_events_archive.htm. Jeroen’s presentation focused on the heavy lift scope that consisted of installing five risers in one of the world’s deepest developments to date, the Cascade and Chinook fields, in 2500–2750m water depth. This development, by operator Petrobras, also brought the first floating production, storage and offloading (FPSO) unit into the Gulf of Mexico. It is also coincidentally the deepest FPSO installation in the world to date. Ben’s presentation looked at the holistic need to match industry’s evolution from the first exploration stage through development production, and finally to refining and processing. The value chain was examined and cost considerations looked at.

3. Light Weight Float Over Installation, presented by Garrick Aberle, Director, FIE Australia, ICON Engineering Pty Ltd

The engineering requirements taken into consideration when contemplating moving very large heavy objects across the world’s oceans proved fascinating, with numerous examples of recent heavy ocean passages.

All of these presentations are available on the SUT Perth Branch

Garrick explained how float-over installations are an increasingly

UT2 August 2012

142

common technique being used for the installation of very large, fully integrated and pre-commissioned topsides units. The technique can also be used for relatively small topsides or module loads, but with careful consideration of downscaling issues. The dynamic response of smaller float-over vessels and loads demands hydraulic load lowering systems, as the traditional ‘barge ballasting’ techniques are too slow for the higher system response rates. ICON Engineering has conducted several successful float-over installations of wellhead platform topsides in Malaysian waters, with loads as low as 800–1000 tonnes having been installed using a ‘floating forklift’ technique. Garrick provided a brief overview of this installation technique, which again demonstrates the advantages that can be gained from applying sophisticated hydraulic solutions to the dynamic offshore environment. The presentations concluded at 7.30pm, at which time everyone continued discussions and networking while enjoying the hospitality sponsored by ICON Engineering.

UT3 August 2012  

The August edition of UT3, the magazine of the SUT

UT3 August 2012  

The August edition of UT3, the magazine of the SUT