NDLI: Evaluation of Key Hydraulic Tensioner Performance Parameters for Ultra Deep Water Applications

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Yu, Alan Cheng, Yongming Bhat, Shankar
Copyright Year	2008
Abstract	Hydraulic tensioners are widely used to provide tension and stiffness to vertical risers on spar and tension leg platform floating production facilities. Their performance directly affects dynamic response of the risers and the global motions of the floating system. The coupling effect of the tensioners, risers and vessel becomes increasingly important as the water depth increases into the ultra deep. This paper evaluates key performance parameters of long-stroke high-tension hydraulic tensioners for ultra deepwater application. It derives the fundamental equations and evaluates key performance parameters and their impact on the riser and vessel responses. This paper also proposes data measurement locations and methods to collect field data for calibrating these key performance parameters for future hydraulic tensioner design. The key tensioner performance parameters are the gas constant and the cylinder friction. In addition for a typical spar riser configuration, the keel joint friction also plays an important role in the overall riser performance. Their importance increases as water depth increases to 8,000 feet and beyond due to the nature of the coupling effect, long stroke and high tension requirements. Gathering of full scale-test data for these parameters has been costly. With several 7000 to 8000 feet risers and tensioners to be installed in the next few years, a method of collecting field data and its analysis for calibrating against the current assumptions of these parameters is proposed.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	415
Ending Page	428
Page Count	14
File Format	PDF
ISBN	9780791848203
DOI	10.1115/OMAE2008-57465
e-ISBN	0791838218
Volume Number	Volume 3: Pipeline and Riser Technology; Ocean Space Utilization
Conference Proceedings	ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2008-06-15
Publisher Place	Estoril, Portugal
Access Restriction	Subscribed
Subject Keyword	Dynamic response Water Keel Tension-leg platforms Vessels Production facilities Spar platforms Design Pipeline risers Deepwater development Friction Stiffness Tension Constants (physics) Risers (casting) Wing spars Cylinders
Content Type	Text
Resource Type	Article

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