地质科技情报2017，Vol.36Issue(3)：249-254,6.DOI:10.19509/j.cnki.dzkq.2017.0334
管道水平定向钻穿越扩孔孔洞形成机理及孔壁稳定性分析
Hole Forming Mechanism and Hole-Wall Stability of Pipeline HDD Reaming
李琴 1徐果 1黄志强 1马亚超 1谢豆1
作者信息
- 1. 西南石油大学机电工程学院,成都610500
- 折叠
摘要
Abstract
Hole-wall instability is a bottleneck in Horizontal Directional Drilling (HDD)reaming and reamer subsidence forming calabash-shape hole is a key reason for hole-wall instability.Currently,circular holewall stability is focused on reaming hole-wall stability rather than calabash-shape hole-wall.Dynamic model of reamer and geotechnical system is established based on FEM.Reamer subsidence forming calabashshape hole is studied.Besides calabash-shape hole-wall stability is studied on the basis of FEM.The research shows that reamer subsidence has a limited subsidence value,equal to the differential of prime reamer diameter and current drilling-pipe diameter,which cause the forming of calabash-shape hole.When its height is compared with the actual hole height of Indian Purna and Wei River crossing construction,the relative error is 7.39％ and 9.8％ respectively.The relative error reflects certain reliability of the explanation.Compared with circular hole-wall stability,instability chance of calabash-shape hole increases by 138％.The impact of bore shape is cause as the hole-stability of waist is smaller than that of the top.关键词
水平定向钻/葫芦形孔洞/孔壁稳定性/扩孔器/下沉规律Key words
HDD/calabash-shape hole/hole-wall stability/reamer/subsidence regularity分类
天文与地球科学引用本文复制引用
李琴,徐果,黄志强,马亚超,谢豆..管道水平定向钻穿越扩孔孔洞形成机理及孔壁稳定性分析[J].地质科技情报,2017,36(3):249-254,6.
