... ABSTRACT The motions of the vessel and the offshore platform topsides are quite complex during lifting operations by the dynamic positioning (DP) crane vessel. To ensure the safety of the operation, it is necessary to maintain the stability of the topside movement to avoid collisions between...

... ABSTRACT With the increasing weight of the topsides of the offshore platform in the developing offshore oil and gas resources, the installation cost and difficulty are greatly increased. It is necessary to reveal the dynamic response characteristics of the floatover operations and accurately...

... ABSTRACT Twin-barge floatover method can utilize two barges to install the topsides and is a promising method for the mega topsides installation. However, the complex connections between the twin barges and topsides pose great difficulties for floatover operation. The installation process...

... to winterization measures for ships sailing in arctic waters but does not specifically focus on the safety boats onboard these ships. europe government procedure topside hatch marine transportation norway government ice thickness ice layer maritime organization upstream oil & gas thickness...

... trunnion receptacle protection frame old riser clearance installation new riser operation topside arrangement clamp receptacle clamp elevation platform Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright ©...

... ABSTRACT A mega topside of an HVDC platform located in the North Sea was transported by a DP-2 heavy transport vessel, M/V Xiang He Kou from Dubai, UAE to the German offshore installation site. After the voyage, the topside was successfully installed by dynamic positioning (DP) float-over...

... upstream oil & gas installation winch offshore pipeline chain jack riser load test scr rps pull-in wire installation procedure pull-in system topside subsea system south rps winch wire pull head operation semi scr pull-in system pull-in chain scr pull head...

... and the topside equipment. Production influences depend on availability of plants, skilled workers and coastal infrastructures, which in turn determine the choice of material for the construction of the facility s base structure. Production influences also affect the method (technology) of facility transportation...

... ABSTRACT During twin-barge float-over installation of topsides, there are two mating phases with load transferring. In this study, the load transfer process of the first mating phase is carried out continuously by approximately simulating ballast tanks with time-dependent point masses...

... ABSTRACT The limited weather window is critical issue for the floatover installation of offshore platform topside. This study presents the experimental analysis of the floatover installation using the rapid transfer technique. The continuous load transfer operation in beam waves...

... stages for the selected design sea states. Special attention has been paid to the two rapid load transfer phases, in which the jack-down operations are simulated with a special connector that allows the topside elevation being quickly reduced on barge. Load decrease on hydraulic jacks and load increase...

... water, cooling water, steam, etc. Topside piping is categorized into mainline piping and small bore piping (SBP) (which includes relief lines, instrumentation ports, nozzles, drains, vent lines and pressure safety valves) (Harper, 2014). The metric behind the aforementioned categorization of piping...

... ABSTRACT In case that a topside is transported to an installation site by using a deck transportation vessel, a topside could be fixed by using seafastening structures to be installed to a transportation vessel safely. Topside and seafastening structures behave in connection...

..., which is more prone to vibrations) in the Arctic region, it seems quite likely that vibration induced fatigue (VIF) failure of topside piping will form the lion's share of HCR on offshore oil and gas (OOG) platforms in the Arctic region. Furthermore, due to the "zero oil spill" requirement in the Arctic...

... ABSTRACT This paper presents the rational analysis method and its successful application in the floatover installation of the JZ9–3 topsides for a central production platform in a water depth of 8.9 meters in China Bohai Bay. Some limited model test results are available for a comparison...

... ABSTRACT The floating crane vessel can be applied to install the offshore topside module of the platform during the lifting operations. If the motions of the topside are large due to the severe ocean environments, the topside will frequently collide with the jacket structures, which...

... ABSTRACT In this study, time-domain mating analyses were carried out to verify safety of float-over operation during various load transfer stages. Water depth of the target field is 130m. Topsides weighing 20,000 ton will be installed on fixed jacket structure by float-over using DTV (Deck...

... Experimental Investigation on Mating Operation during Float-over Installation of a Large Topside in Waves N.W. Kim*, B.W. Nam*, Y.J. Kwon*, S.K. Cho*, I.B. Park*, H.G. Sung* *Korea Research Institute of Ships and Ocean Engineering (KRISO) Daejeon, Korea ABSTRACT In this study, a series of model...

... ABSTRACT In this paper, an experimental investigation of the seakeeping behavior relative to a newly developed float-over concept by TechnipFMC ROC for transportation, installation and decommissioning of off-shore platform topside is presented. A rigid scaled model of the float-over system...

... cg flex big-b cg flex float-over system regular wave experimental campaign catamaran head wave subsea system cfo cg flex topside amplitude elastic mode oblique sea experimental analysis upstream oil & gas small-b cg flex frequency heave rao irreg barge rao...