Summing-up the detecting of hydraulic seal and air pressure seal on oil extraction wellhead equipment,and based on the development of super high pressure airproof equipment,its design principle,making,setting,data measuring,analysis and processing of pressurized seal test stand are br.

Finite Element Simulation of the Gas Flow Field in the Dry Gas Seal Spiral Grooves;

Application of the Tandem Type Dry Gas Seals in Light Hydrocarbon Pumps;

Applications of Dry Gas Seal in Propane Pumps;

Dynamic pressure calculation of steady-state micro-scale flow field in spiral grooved dry gas seals;

A stability analysis for lubricating gaseous film of spiral grooved gas seals subjected to angular eddy motion;

It is shown by analysis that the main reasons for the damage of dry gas sealing are the higher vibration of radial tile at both sides and higher temperature of thrust tile.

The structural characters and control principle of the floating ring sealing and the double face dry gas sealing are introduced.

Presented the structure and principle of floating ring sealing and dry gas sealing for compressor,compared the advantages and disadvantages between them,put forward revamping scheme with dry gas sealing.

The mechanism of oil vapour loss is discussed and the application of nitrogen gas sealing technique to store and transportation is introduced.