Flow experiment of circulative micro-foam drilling fluid in well bore under HTHP conditions;

The dynamics simulation of rotating rod string in well bore;

Analysis result of high productivity gas wells in Luojiazhai shows temperature effect of well bore as the key factor affecting well head pressure.

Development and application of multi-function process tubing string used for reducing liquid level in wellbore;

Technology of blending diluting oil in ultra-deep wellbore of Tahe Oilfield;

Mathematical Model of Wellbore Hot Fluid Circulation and Its Analytical Solution;

Safety assessment and breaking prediction system of mine shaft;

Surface protection technology applied to improve service time of hoist guide in mine shaft;

Analysis on uneven side pressure affected to mine shaft stressed;

Design and Construction of Falling Airshaft Repairing;

Chemical injection of re-destroyed shaft in Xinglongzhuang Coal Mine;

The acoustic theory and borehole acoustic field distribution study and it s applied prospects;

Prediction of borehole hydrate in gas well;

A new way to predict borehole flowing temperature distribution;