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;

Examination and investigation of drilling mud for the strata that always sop in water in diggings in Anhui province;

The purge and utility of mud in drilling cast-in-place pile;

The role lecithin plays in improving slip properties is studied.

The dilution of porcelain clay containing montmorillonite slip is studied using six diluents.

The montmorillonite clay slip and montmorillonite clay with NCMC slip were also analyzed by FT-IR,XRD and TEM.

Study on the Law of Ultrasonic Transmission in Mud Fluid;

KCP mud fluid is the anti-high temperature one which is utilized todrill the geothermal well and uses the KHM,CMC and PHP as the additives.

The mud fluid’s raw materials used in the shield driven tunnelling across Yellow River for the Diversion Project from South to North China and their properties were compared and selected, and the control ranges of majer index of mud fluid properties were given.