An Improved Algorithm of Rheology Parameters of Power-law Drilling Fluid;

Trial evaluation on drilling fluid and mechanical properties of rock while considering size of rock;

Present study on leak resistance and sealing technology while drilling and drilling fluid based on physical method;

New theory and method for optimizing the particle size distribution of bridging agents in drilling fluids;

A study of the properties of hydrophobically associating water-soluble polymers used in drilling fluids;

Because of the complex downhole geological conditions,the high-density drilling fluids(high than 2.

Rresearch of influence of drilling liquid on E_1f_1 member gas-bearing sandstone reservoir of ZJD structure;

The survey and analysis are given to the applied status of the fluid loss control-agent——synthetic polymeric compound used as drilling liquid in Zhongyuan oilfields.

This article has introduced the formula advantage and technological measure of "Wuwang" drilling liquid,whose application in the North Shaanxi areahas prove good inhibition to satisfy the need of the area's layers for the performance of drilling liquid,reduce accidents in the mines and have better social and economic effects.

A series of friction and wear tests were performed on an MG-200 high temperature and high speed test rig to investigate the effect of barite and iron ore powder doped in the drilling mud on the friction and wear behavior of a casing/drill-pipe pair.

By comparing drilling mud mixed with different KHm, the influence of auxiliary agent KHm on the water-loss reducing ability of drilling mud is discussed.

When we drill the formation in ocean where the gas deposits, the natural gas breaks into the well bore and circle space and generates hydrate with water in drilling mud under certain condition.

primaty study of a new drill fluid weight additive;

The indoor experimental results of the magnetizing conditions of the drill fluid have shown that the optimal magnetizing parameters include that the magnetic field intensity reaches 2 500 kA/m and the magnetic time is 1～2 hours and there is a lower influence on the temperature to the magnetizition in the paper.

A new method一一electric field methodis developped to control the plasticity of drill frag-ment particles of oil shale in the drill fluid.