Effects of Well Trajectory in DirectionalHole on Casing Stress under Different In-situ Stress Conditions, Progress in safety science and technology, 2005.
定向井套管应力随地应力条件的变化规律研究，石油学报，2005。
2
Directional engineering hole drilling technology is a new technology in drilling engineering projects.
工程孔定向钻进技术是钻探工程的一项新技术。
3
The DH4-8 well, located at Donghetang Oilfield in Tarim Basin, Xinjiang, is a directional production well with the deepest open hole sidetrack point and the longest open hole section.