Analytic and numerical solutions of variable boundary seepage model of the unstable well flow in underground water flow;

A new method of predicting borehole stability while drilling based on seismic attribute technology;

Research on in-situ stresses and borehole stability of coal seam in Jingbian gas field

Mechanical borehole stability test study in highly-dipped laminated formation

The Coupling method research on the mechanics and chemistry of the shale hole stabilization;

Through optimized casing program and drilling parameter, predicting reservoir pressure and caving stress, and determining rational drilling fluid density, the problem on hole stabilization is solved and good result i.