Study on Casing Pressure Anomalous Treatment Technology of Underwater Wellhead in Deep Water Gas Field 
Luo Rui-qiao, Yang Xin-zhou, Yang Peng, Tang Sheng-lai, Pan Xue-zheng
Ocean Engineering Equipment and Technology . 2019, (增刊): 133 .  DOI: 10.12087/oeet.2095-7297.2019.z1.26