Countermeasures of improving drilling technology economic indicator for deep wells in western Sichuan;

Application and development of horizontal well drilling technology in Jianghan Oilfield;

It discussed karst growth rule in Zhengzhou,destroy depth disturb mining,slip-casting and the problem of drilling technique.

The wirelinecore drilling technique can be utilized to achieve such technical and economical effect as top quality,high efficien-cy and low consurnption when geological exploration holes go more and more deep,coring becomes more andmore difficult and the drilling site is more and more remote.

The present situation of international drilling market and the development of solid mineral drilling techniques are sized up.

Several drilling techniques for decreasing investment and increasing development benefit of geothermal resources were approached after analyses on current situation of geothermal resources development in Daqing Oilfield.

Research and Application of Drilling Technology in Carboniferous System in Northwestern Edge of Zhunger Basin

Thermo-mechanical rock fragmentation drilling technology (TM ) is a kind of new drilling method, which firstly makes use of the friction energy produced by drill bit and rock to heat the rock, and then uses the cutting unit to complete the rock fragmentation.

In currently geotechnical engineering,it is facing one of the most important technical problem about drilling technology of large diameter bored-pile in alternating hard and soft rock which obliquity change large and steep.