... of accommodating even larger wind turbines with minor modifications on the floater design make the proposed FOWT a relevant concept for the upcoming offshore floating wind market. wind energy configuration turbine heave subsea system dynamic stability minimum breaking load basin test validation new...

... technologies?? are then evaluated through the Technology Qualification Process. The Chevron's TQ Process was co-developed with DNV and is based on DNV-RP-A203 " Qualification Procedures for New Technology??. heave motion technology qualification technical challenge upstream oil & gas tensioner...

... when the sea condition is multidirectional (sea and swell), which is often the case offshore West Africa and Brazil. Indeed, the motion of the structure as well as the tension in the cable depend on the frequency content of the heave of the hang-off point (crane tip or sheave of the A&R winch...

... wave height in excess of 80 ft. is included. Holstein is the largest truss spar and the first to utilize mechanical riser tensioners, rather than buoyancy can riser tensioners. The added stiffness, which the mechanical tensioners provide, moves the heave natural period closer to resonance with extreme...

... Abstract Recovery of cores and logging data from a dynamically positioned drill ship introduces significant heave related depth uncertainties. Heave compensation plays a pivotal role in assuring downhole data integrity by countering the effects of the ship's heave while tools are downhole...

... Buoy/Mooring/OOL run in time domain is now a standard way to derive the buoy motions and RAOs (Ref.2). The small size of the buoy associated to a partial taut mooring system and heavy OLLs give heave/ pitch / roll natural frequencies close to the peak frequencies of the most damageable wave spectra...

... deployment techniques have developed in order to reduce costs associated with expensive 5th generation drilling vessels. This paper presents various vessel and rope system configuration options for deployment. It is shown that the demands of package weights and lowering depths, as well as the small heave...

... rates and oil recovery often requires a comprehensive work-over and well maintenance program. upstream oil & gas clearance heave dcu pollack otc 14256 heave motion dry tree fpdso unit tendon roll motion sse 0 barge tld system wave frequency otc 14256 riser offshore technology...

... of a DDF with 56 000 Mt displacement and up to 30 rigid risers. The DDF has been analyzed at 1400 m water depth both in a West Africa and a Gulf of Mexico natural environment. By investigating the effect of including keel plates at large depths below the SWL, the heave response of the DDF can...

... cable tensioner riser diameter tlp hard riser otc 11902 tld upstream oil & gas spar heave pollack surface tree riser buoyancy riser tensioner technology conference tendon poldervaart fpso OTC 11902 A Surface Tree Riser Tensioning System for FPSOs J. Pollack, L. Poldervaart and M...

... Abstract Motion response of spar platforms is studied, using a simplified calculation method. Classical spar platforms are vulnerable to heave resonance in sea states with long wave periods. Mathieu unstable pitch motion combined with extreme amplitude heave resonance is detected both by using...

... sensors included with RAPIDS, differential GPS, a directional wave buoy and two current profiling buoys were added for this project. significant wave height sensor subsea system heave frequency fpso offshore technology conference stiffness accelerometer floating production system...

.... frequency vortex bend stiffener installation bpp technical service subsea system vibration surge curvature amplitude sensor riser otc 8883 fpso heave barnay otc 8883 lyon upstream oil & gas frequency component foinaven umbilical performance aTe 8883 The Foinaven Umbilical...

... offshore in 3,000 ft of water during May 1996. The Heave Compensated Landing System (HCLS) concept, offshore testing program, test results, lessons learned, and future developments are discussed. winch workboat deployment line remotely operated vehicle configuration offshore technology...

... is made of concrete and is a Co deep SP-4 -19-R design, comprising skirt piles, 19 caisson cells, one Siegel and four shafts. Figure 3 provides a general view and a cross section. otc 8122 circular cell water pressure pressure difference heave penetration soil heave subsea system skirt...

... penetration depth water pressure suction offshore technology conference penetration geotechnical experience otc 7795 foundation jacket inclination europipe jacket weight penetration heave seabottom penetration resistance completion installation and operations resistance inclination OTC 7795...

... position and set down in such a manner that the seabed would have minimum disturbance. Channels or rabbit holes in the sand around the circumference of the skirts. piping simulation contractor bucket foundation foundation europipe jacket heave otc 7794 clearance operation risk...

... environmental factors such as current and wind but, more particularly, takes no account of the nature of the seabed, nor of any heave motion. Clearly, different consequences for the rig will result from moving onto soft clay compared with dense sand and hard clay. Touching down on rock will be even more onerous...

... riser tensioning concept designed for a so-called "minimum heave" semi-submersible (ref.1). Sixteen risers are connected to a common grid-like structure supported by twelve pairs of tensioners placed around its outer perimeter. Computer based analysis highlights the significant design considerations...

... of floating operations. The paper describes the rig upgrades which have been carried out to introduce SHD on floating rigs particular attention being given to active heave compensation and kick detection. The impact of this equipment on the drilling operation has been briefly analyzed. It is concluded...