Study on the variations of corner and load on bottom ball joint of deep-water drilling riser
As the offshore drilling expands to deep water, the influences of bottom ball joint comer 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 comer 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 comer on bottom ball joint has a linear relation with the drilling vessel drift rate similarly.However, the comer 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.
Deep-water drilling riser corner load
Tan Qiang Yuan Junliang Deng Jingen
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum,Beijing 102249, China
国际会议
湖北荆州
英文
547-550
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）