... china government frequency formula recess-type moonpool asia government drillship motion response surge rao upstream oil & gas moonpool natural frequency resonance sloshing-mode natural frequency sloshing-mode resonance drilling equipment moonpool configuration forward speed...

... ABSTRACT Drillships are deployed for exploratory drilling in water depths up to 3200 m. New-generation drillships possess variable loads and internal storage capacity. They can operate in ultra-deepwater under severe environmental conditions. The current study is focused on the dynamic...

... ABSTRACT Moonpools are the vertical openings on drillships and offshore structures applied to lower or lift equipment for operation. Open moonpools have an adverse impact on ship's resistance performance. In this paper, added resistance of two moonpool configurations is investigated...

... drilling equipment water motion resistance ship hull resistance fft analysis upstream oil & gas cfd simulation time history hull resistance speed 0 piston mode simulation ship hull water agitation resonance frequency drillship moonpool calm water encounter period 1...

... ABSTRACT This paper presents the results of wind load CFD calculations performed on the simplified topside structures of a drillship. The CFD calculations were carried out for two configurations: with and without the drilling derrick. The CFD calculations were performed at model scale...

... ABSTRACT In the traditional method of construction, drillship's blocks are erected one by one from stern to bow in dry dock, which need more time and more lifting operation with high-risk. In order to improve the shortage of the traditional one, the usage of new construction method...

... ABSTRACT Methods of calculating environmental loads are introduced, including wave loads, current loads and wind loads. Especially for wind load calculation, a method considered wind force direction correction and shielding coefficient among different parts of drillship is introduced...

... ABSTRACT Hydrodynamic analysis of a seventh generation ultra-deep water drillship is carried out to solve added mass and response amplitude operator. Short term response predictions with South China Sea, West Africa, Brazil oil field environment conditions are analyzed and the operation...

... channel width and floe shapes. INTRODUCTION The presence of floating ice poses many challenges to stationkeeping of drillships. The design of a Dynamic-Positioning (DP) system, for example, requires reliable estimates of the forces due to impinging ice, the rate of change of ice forces, and changes...

...Study on Hydrodynamic Performances of a Deep-Water Drillship and Water Motions inside Its Rectangular Moonpool Xiaoxian Guo, Haining Lu, Jianmin Yang, Tao Peng State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China. Collaborative Innovation Center for Advanced...

... Abstract In this paper, drift off simulations have been performed for a full DP deep water drillship by using a time domain DP analysis software. Especially the analysis is focused on the drift off motion of a drillship from the moment of blackout until the recovery of thrusters. Two different...

... interaction technology facilitate operation thrust simulation approach capability assessment watch circle dp capability drillship upstream oil & gas drilling equipment operation Advanced Computing Technologies Facilitate Operations of Dynamically Positioned Vessels Sue Wang, Ping Lu Offshore...

... Abstract With the continuous development of offshore oil and gas resources in deep-water, fatigue has become a major concern for structure safety. It was recognized that the topside and hull interface structures in drillship are critical for the structure integrity. Consequently, a proper...

... response of the semi-sub at low wave periods compounds the wave loading effect on the riser while the moonpool of the drill-ship shields the riser from the wave zone and modifies the response of the riser. wave zone wellhead drillship fatigue life rig stiffness seastate tensioner system...

... water depth dynamic positioning system equipment guodong ji icebreaker drilling equipment platform drillship polar drilling drill platform semisubmersible drilling platform exploration upstream oil & gas Current Situation and Development Trend of Arctic Drilling Equipment Guodong Ji...

... between shallow and deep zones in Arctic waters. This shifts the focus for the developers of those leases to floating platforms and drillships. The next boundary that faces the industry is that of mooring system capacity. Floating systems such as Hoover-Diana (Fig. 1c) are held in place by mooring systems...

... a racetrack versus circular icebreaker track to maintain an ice channel for the stationary drillship. KEY WORDS: Arctic, ice management, icebreaker, icebreaker simulation, Arctic drilling. INTRODUCTION With a flurry of recent exploration license awards and more on the horizon, the challenge of drilling deep...

... An Introduction to Engineering and Construction of TMT Deepwater Drillship Yeong-Dae Kim, Jang-Ryong Shin, Yun-Kil Shin Hull Design Department, Daewoo Shipbuilding & Marine Engineering Co., LTD. Geoje city, Gyeongsangnam-do, Korea ABSTRACT This paper provides an introduction to the TMT Deepwater...

... ABSTRACT TOI drillship, first drillship of DSME, was designed to have more than 25 years' fatigue life against given environmental conditions. Fatigue damage in hull and hull-topside interface structures was assessed based on stochastic method. D-SAFS, developed by DSME, generates stress RAO...

... ABSTRACT JAMSTEC (Japan Marine Science and Technology Center) are constructing a deepwater scientific riser drillship (Figure 1), which will be made available for international cooperative scientific research program, the IODP (Integrated Ocean Drilling Program) (Yano and Takagawa, 2001...