Calculation method of riser top tension in deep water drilling

被引:0
作者
Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing [1 ]
102249, China
机构
[1] Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing
来源
Shiyou Kantan Yu Kaifa | / 1卷 / 107-110期
基金
中国国家自然科学基金;
关键词
Deepwater drilling; Riser; Top tension;
D O I
10.11698/PED.2015.01.14
中图分类号
学科分类号
摘要
Through mechanical analysis, a calculation method which meets the requirements of both the riser stability and the bottom overpull margin was deduced. It was verified by an example of ultra deepwater well in South China Sea, and compared with two other common methods. Based on the related theories of pipe string mechanics, the effects of true axial force and effective axial force on the riser mechanical behavior were analyzed. The results show that, the bottom tensile force to Lower Marine Riser Package is determined by true axial force, and the riser's stability depends on effective axial force. Through the force analysis of riser which simultaneously bears the internal and external pressures, the correspondent mechanical model was established, and a new calculation method of top tension was derived, which remedies the deficiencies of algorithms proposed by American Petroleum Institute and Institute of French Petroleum. Field application shows that, the value of top tension calculated by this method is basically the same as the value set by field operation, and moreover, it is more accurate than the value obtained by the algorithms of American Petroleum Institute and Institute of French Petroleum. This method can be used to guide the design and operation of conductor. ©, 2015, Science Press. All right reserved.
引用
收藏
页码:107 / 110
页数:3
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