... responsible manner. contractor offshore pipeline subsea system floating production systems riser operation fpso riser removal vessel removal contractor shell riser removal contractor shell brasil turret brazil winch riser and umbilical flexible pipe tensioner dw tool reel requirement...

... Fully coupled time-domain analysis is performed using Orcaflex to confirm the design's station-keeping performance, the motion response and mooring line tension for selected design load conditions. The following operating and environmental conditions are assumed in the analysis. Operating...

... an in-line mooring tensioner, removing the traditional mechanically complicated and space demanding "on-vessel" winch systems. Vito employed a passive hull system, with all ballasting occurring over the top without hull penetrations. There were no pump rooms within the hull as equipment is accessed from top...

... that occurred in the cable after replacing the tensioner system; the feasibility to use the rig drill string instead of an RSV to replace the tensioner; and the need of unlatching the BOP to replace the tensioner system, with suggestions to avoid this in the future. The challenges overcome in this operation...

... of the wellhead and expand the margins for safe drilling operations. A new ROV-operated Wellhead Load Relief (WLR) system, developed specifically to mitigate fatigue, uses special tensioners that are tethered individually to the BOP. Each tensioner contains a hydraulic spooling unit with a lock- and-pull...

... Perryman , S. and Gebara , J., T. " Holstein Truss Spar and Top Tensioned Riser Innovations " Paper 17292, Offshore Technology Conference Proceedings , Houston 2005 Fulton , D. , Johnson , D. , Kamal , R. , Kite , M. , Ting , M. and Lindsey , M...

... Abstract Mooring tensioning systems for offshore floaters have evolved from rotary windlasses on ships into multiple options nowadays. These options include fixed or movable winches, either linear or rotary, driven by electric or hydraulic, and the most recent in-line tensioners which remove...

... the use of top tension risers with dry trees. Other advantages of the OPS are a shallow quayside draft, a large payload capacity and the ability to operate in ultra-deepwater. The primary design challenge for dry-tree semi-submersibles is to make their heave motions compatible with the stroke range...

.... , " The Tension Leg Platform Technology - Historical and Recent Developments ," OTC 24512, 2nd Offshore Technology Conference Brazil, Rio De Janerio , Oct. 2013 . D'Souza , R. , Aggarwal , R. , and Basu , S. , " A Comparison of Pre- and Post-2005 Sanctioned Gulf of Mexico Tension Leg, Semi...

... with vessel drifting, determination of watch circles, typhoon evacuation plans, hang-off operational criteria, evacuation plans for cold fronts, allowable riser tension range, and riser fatigue measurement with vortex-induced vibration (VIV) monitoring. Assessment of deepwater/high-current riser drilling...

... riser tensioner technology; and deriving a hull-mooring-riser global configuration that not only carries robust performance during operation, but also offers the benefits during project execution. 1 Lee , M. Y. , Poll , P. and Zeng , J. ( 2011 ). "Dry Tree Alternatives...

... tension and tensioner crush operating loads. A 3 Dimensional Umbilical Simulation Tool, known as 3DUST has originally been developed by DeepSea (Dixon and Zhao, 2008), now a McDermott subsidiary. 3DUST is capable of three dimensional modelling of umbilicals and consists of pre-processing and post...

... and connectors, going through the vessel tensioners and stinger also called firing line. Generally two mudmat wings are added before reaching the stinger and then unfolded subsea. In the new method, a purposely designed mudmat and associated devices is post- installed at sea-bed level on top of a previously laid...

... is based on the proven technology of a conventional four-column deep draft semi-submersible and comprises topside facilities, hull and mooring system, top-tensioned risers, and steel catenary risers. The paper discusses engineering analysis, computer simulation, and model test validation carried out...

... of the floater, riser system and responses, tensioner capabilities as well as technology qualifications. The paper will make relevant comparisons with other competing floating systems like TLPs, FPSOs and spar units. The methodology recommended to be utilized for the evaluation of the DTS technology is based...

..., and offshore Brazil. However, a dry tree semisubmersible solution for hurricane environments that is both technically and economically viable is in various stages of maturity. The challenge for these structures in hurricane environments is the magnitude of the stroke of the top tensioned risers (TTR) which...

... Abstract The focus of this presentation will be to discuss and evaluate major concerns in the development of Long Stroke Ram-Style Tensioners, as an enabling technology to address the upcoming demands of the Offshore Industry as it pushes to drill and produce in ultra-deep water...

... system consisting of an under water subsea intervention device (SID), a presurized riser, a surface Blow Out Preventer (BOP) and top tensioning. Production mode continues with dry trees located on the production deck supported by the same tensioners used in the drilling mode. The tensioners are supported...

... developed and qualified for the Gulf of Mexico. A key component of the dry tree semisubmersible is the riser tensioning system, which must be carefully matched to hull motion characteristics and arrangements. The SPAR platform utilizes self-supporting buoyancy cans or long stroke riser tensioners...

... an industry-first Floating Drilling Production Storage and Offloading (FDPSO) vessel (ref. Figure 1). Combined drilling and production operations do not represent new technology per se as both SPAR and tension leg platform (TLP) concepts also afford this capability. However, Azurite represents the first time...