Zhang Xin

TL;DR: In this paper, a novel elastic-plastic model incorporating the effects of drilling, cementing, and dramatic temperature change of the well system during the hydraulic fracturing is established to describe the stress of cement sheath.

TL;DR: The results suggest that the presented method is a reasonable starting point for monitoring down-hole incidents during the shale-gas well fracturing process and can be integrated into a real-time monitoring and alarm device for field application during fracturing operations.

TL;DR: It is shown that the proposed DOOBN model is a reasonable starting point for forecasting the remaining life of pump injection systems and could be integrated into a real-time safety warning device for field application.

TL;DR: It is shown by application that the proposed real-time risk assessment method based on a hybrid Bayesian network (HBN) can improve the situational awareness among operators, which is an effective method to control and reduce risk.

TL;DR: In this paper, a radar monitoring method and device for the long-term security risk of chemical equipment is proposed, which comprises that real-time operation state data of the chemical equipment are obtained, the risk and operability of each system of the equipment are analyzed, technical deviation is determined, and data to be monitored is screened from the real time state data.