Early diagnosis for the stress concentration zone of borehole casing pipe by metal magnetic memory and wavelet transform;

Study on collapsing strength of casing pipe on the residual stress;

Monitoring technique and application of reservoir,case and wellsite facilities which oilfield development mainly concerns are introduced.

Accord to high water containing developing period of Daqing oilfield and actual situation of case damaged seriously in water and oil wells, a set of explosive perforation tech for cased well is introduced.

Injection unbalance caused by case damaged not only effects unsteady of oil field production, but also brings about oil-water well stopped, discarded which makes it unusually conduct of normal operation.

Punching technology for the sleeve of a new type expansion bolt;

Ultimate strength of sleeve reinforced T-joints under out-plane bending;

Various defects may occur in the production of plastic sleeve of railway switch tie with non-alkali glass fiber reinforced polyamide 66(GFRPA66), and reasons caused these defects are analyzed.

Wetted Analysis and Preventive Measures of Bushing in Converter Transformer;

Application and Discussion of Value Side Bushing Test Method of Converter Transformer in 500kV Converter Substation;

Partial Discharge Phenomena of Oil-Paper Capacitor Bushing and Their Analysis;

Research on Corrosion Mechanism of Casing Steel in Saturated Brine;

Influence of non-uniform external-pressure load on the load-bearing capacity of casing;

Stress analysis and strength study of hydraulic slotting casing;