Study on the Variations of Corner and Load on Bottom Ball Joint of Deep-Water Drilling Riser

Qiang Tan; Jun Liang Yuan; Jin Gen Deng

doi:10.4028/www.scientific.net/AMM.318.547

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 318Study on the Variations of Corner and Load on...

Study on the Variations of Corner and Load on Bottom Ball Joint of Deep-Water Drilling Riser

Abstract:

As the offshore drilling expands to deep water, the influences of bottom ball joint corner and lateral force on drilling security become increasingly significant. During the force analysis, the environmental factors (e.g. wind, sea-flow force, sea ice, etc.) are usually taken into account. Besides, the engineering factors considered in research are top tension ratio and drilling vessel drift. In this paper, a finite element model is established by ANSYS to imitate the force condition of marine riser, so as to analyze the influence laws of top tension ratio and drilling vessel drift rate on marine riser stability (i.e. the corner and lateral force on bottom ball joint ) in Beaufort force scale 3 and 8 windy conditions. The results show that the lateral force increases with the drilling vessel drift rate and top tension ratio accordingly by linear mode. For the same tension increasing extent, the greater the drilling vessel drifts, the more increasing range the lateral force appears. The corner on bottom ball joint has a linear relation with the drilling vessel drift rate similarly. However, the corner on the bottom ball joint demonstrates a non-linear decreasing method as “fast followed by slow” due to the increasing top tension ratio. The research plays a role in the security assurance of sub-sea wellhead in deep-water drilling operation.

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Periodical:

Applied Mechanics and Materials (Volume 318)

Pages:

547-550

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.318.547

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Online since:

May 2013

Authors:

Qiang Tan, Jun Liang Yuan, Jin Gen Deng

Keywords:

Corner, Deep-Water Drilling, Load, Riser

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References

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