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不扩孔径向水平井钻管转向仿真研究
徐金超1,杨永印1,李新辉2,李楠3
(1.中国石油大学石油工程学院,山东青岛266580;2.胜利油田黄河钻井五公司,山东东营257000;3.长城钻探地质研究院,辽宁盘锦124010)
摘要:
针对177. s mm套管内部空间尺寸的约束条件,建立转向器弯曲导向滑道及钻管模型,利用ANSYS软件,对钻 管通过转向器滑道的转向过程进行有限元仿真研究。仿真结果表明:在钻管弯曲转向时钻管弯.曲内侧更易发生失 稳;转向器滑道曲率变化率是个非常重要的参数,钻管应力、截面变形、钻管阻力都与其有关,为了使钻管以低应力、 较为安全的状态通过转向器,减小滑道轨迹的曲率变化率是必要的方式:材料为X的钻管可以安全穿过滑道,钻管 转向后可以沿滑道水平钻进,钻管变形保持在许可范围内,能够满足径向水平并的钻进要求。
关键词:  水平井  钻管  滑道  转向  仿真
DOI:10.3969/j.issn.l673-5005.2012.04.016
分类号:TE 243
基金项目:国家科技重大专项课题(2008ZX05022)
Simulation on drill pipe's bending in non-reaming radial horizontal well
XU Jin-chao1,YANG Yong-yin1,LI Xin-hui2,Li Nan3
(1. School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China ;2.5th Yellow River Drilling Company of Shengli Oilfield,Dongying 257000, China;3. Geology {nstitute of Creatwall Drilling Engineering Company, Panjin 124010, China)
Abstract:
For constrains of internal space in the casing with the diameter of 177. 8 mm, a slide way guided by the steering gear as well as a drill pipe model was established to make finite element simulation research for the steering process with ANSYS software. The results show that the inner side of the bending drill pipe destabilization occurs easily in steering. The velocity of steering gear curvature variation is an important parameter, and the drill pipe stress, section deformation and drill pjpe resistance are correlated with it. It's necessary to decrease the velocity of slide Irack curvature variation in order to make the drill pipe pass through the steering gear in a low stressful and safe sale- 'Hie drill pipe made of X material can pass through the slide way safely and keep along the horizontal direction after steering. In this process, the deformation of the pipe is maintained within the limits so that it can meet the requirements of radial horizontal well drilling.
Key words:  horizontal well  drill pipe  slide way  steering  simulalion
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