探矿工程-岩土钻掘工程Issue(8)：57-60,4.
可伸缩扩孔钻头在深厚砂卵砾石层跟管钻进中的应用
Application of Scalable Reaming Bit in Deep Sand Gravel Stratum with Casing
李建军 1陈保国 2郑伟 3刘宝昌4
作者信息
- 1. 吉林大学建设工程学院，吉林长春130026
- 2. 中国水电顾问集团北京勘测设计研究院，北京100024
- 3. 中国水电顾问集团北京勘测设计研究院,北京,100024
- 4. 长城钻探工程有限公司钻具公司,辽宁盘锦,124010
- 折叠
摘要
Abstract
According to drilling encountered boulder in deep sand gravel stratum in Yarlung Zangbo River Leng-da hydro-power station, a scalable two-wing reaming bit was used to solve pipe blocking.By enlarging a hole in the boulder under the casing, the hole diameter is slightly larger than the outer diameter of the casing pipe to ensure the casing going down to the planned depth.This method can not only avoid the danger and complexity of hole blasting shattering boulder but also can o-vercome casing wear, broken and high cost caused by high torque of casing bit drilling for casing following.This process is easy to master with no limitation of hole depth and can be popularized in pipe-following ream drilling, even in hole acci-dents treatment.关键词
可伸缩扩孔钻头/深厚砂卵砾石层/厚壁套管Key words
scalable reaming bit/pipe-following drilling/deep sand gravel stratum/thick wall casing分类
天文与地球科学引用本文复制引用
李建军,陈保国,郑伟,刘宝昌..可伸缩扩孔钻头在深厚砂卵砾石层跟管钻进中的应用[J].探矿工程-岩土钻掘工程,2013,(8):57-60,4.
