Safe drilling technology for ultra-deep gas wells with complex pressure systems using managed pressure and gas-venting density reduction
LI Tao, YANG Zhe, CHI Chongrong, NIE Zunhao, XU Zhikai, CHEN Xun, WANG Fei
Petroleum Reservoir Evaluation and Development . 2025, (3): 522 -527 .  DOI: 10.13809/j.cnki.cn32-1825/te.2025.03.020