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.

• 位于新疆塔里木东河塘油田的DH4-8井是目前国内裸眼侧钻点最深、裸眼井段最长的定向开发井。