full gauge hole

It is now the deepest large-size wellbore in China.

5mm井眼钻达4436m,为当前国内最深的大尺寸井眼。

This research provides construction experience for the drilling of complicated horizontal wells with high-density drilling fluid, ultra-deep large-size boreholes and the exploration of the deep reservoir in Yingmaili of Xinjiang.

叙述了新疆英买力地区首口水平井YM7-H1井的施工难度、各井段的施工过程、采取的技术措施及井眼轨迹控制方法,为后期在英买力地区钻高密度钻井液、超深大尺寸井眼及中靶精度高、难度高的水平井,加快该区块深部油藏开发提供了施工经验。