Effective calcium-treated mud was testing prepared for the underground salt-water environment with high sodium ion,and the serious pile hole shrinkage and un-position of steel reinforcement cage were solved.

Regeneration preparation and dumping treatment of drilling mud for mine shaft drilling;

A series of drilling mud invasion experiments were conducted on Bentheimer sandstone cores to investigate the dynamic filtration and the compatibility of NaCl muds with a hydrocarbon bearing formation in two phase flow.

To solve the problem in the well caused by the stopping of drilling mud at the time of connection,the continuous circulation drilling technology was developed initially in U.

Biodegradation of pyridine in the slurry system;

Character of boring slurry in pozzuolana sediment area;

The functions of slurry in cast-in-place bored pile construction;