Research on Optimal Design of Bottom Hole Assembly of directional well in Gadin-North Gadin Gas Field.- Critical Length Analysis for Linear Growth of Frictional Resistance of Moving Flexible Screen String in Horizontal Borehole.- Hydrodynamic oscillator mechanism research and field application.- Study on the Error Analysis and Correction Method of Well Deviation Angle Measurement.- Research on Narrow Gap Cementing Technology for Horizontal Wells in Changqing Gas Field.- Optimization technology and application of well structure in leakage risk area of Cangdong Shale oil well.- Numerical simulation of cementing displacement efficiency of rotating liner.- Research and Application of Anti-water Channeling Cementing Technology in Changqing Oilfield.

- Numerical Simulation on Water Hammer Pressure Generated by the Slippage of Bridge Plug During Fracturing.- Experiments and 3D numerical simulation study on the vibration characteristics of PDC drill bits during rock breaking.- Preliminarystudy on oil test and completion technology of over 9000 m deep Wells -- taking Guole X Well as an example.- Development Analysis and Prospect of Continuous Circulation Drilling Technology.- Research and Practice on Sand Control Completion Technology for Heavy Oil Huff and Puff Sand Production Wells in Bohai Bay Y Oilfield.- Study on sidewall collapse failure mechanism of hard and brittle shale.