Formation lithology interpretation of logging while drilling(LWD) is an important problem in geosteering of horizontal well drilling.

The working principal, construction, critical technique and applications of radial horizontal drilling techniques with high pressure water jet are introduced.

Analysis of axial load influence on mechanics characteristic of ocean deep water drilling riser;

Achievements on deep water drilling fluid research;

As more and more oil and gas resources are discovered in deepwater worldwide,the deep water drilling has become more and more in recent years.

It has been used in the determination of chlorine ion content of the drilling waste water.

Because drilling engineering has great concealment and complexity, the total quantity of drilling waste water produced is large and unstable, the component is fairly complex, and concentration is not balanced.

The treatment present situation of drilling waste water in some gas fields of Sichuan Petroleum Administration is described, and the source, composition and characteristics of drilling waste water are analysed in this paper.

Factors in the treatment of drilling wastewater by biological method;

Treatment of petroleum pollutants from drilling wastewater by microbiological method;

Study on the effects of anion on drilling wastewater treatment by electrocoagulation-flotation process;