Multi Well Anti-Cross Technology of Xia T6-361 Well;

The metallurgical structures,mechanical properties and fractographs of EB welded 6061-T6 aluminum alloy joint were studied by means of metallography,mechanical test and SEM technology.

On the Rectification and Strengthening of Underground Safety of Non-coal Mines;

Treatment of underground outer source fire of coal mine;

Danger analysis and management technology for underground working place of Chengchao iron mine;

Research and shop tests of the downhole casing shut-off valve;

Theory design of downhole ultrasonic focusing system;

Preliminary approach to oil production through downhole oil-water separation technique.;

A mechanical floating is used because of instrument,water quality and down hole tools that make in-correct result measured or instrument blocked down hole.

In the light of the serious erode situation of down hole stems,hanging ring technology for erode monitor to oil well dill stem in Lunnan oilfield has been used.

Since the function of separation,the oil is pumped to ground and water injected to down hole.

The nature condition of underground mine is complicated, to effectively monitor the environment and equipment, it must have accurate positioning technologies to localize mobile devices.

The conventional coal and coal refuse separation was to bring the raw coal from the underground mine to the surface and separate in the coal preparation plant.

In order to treat coal sludge water under the dehydrated screen,craft of concentration and filter pressing is adopted,and 500 m2 membrane filter press is installed in underground mine.