The development process of borehole deviation control technology was reviewed,and the causes and harm of borehole deviation incontrollable were presented,and the air hammer drilling,air screw drilling,enlarging borehole and keeping full technology and auto-preventing deviation technology were discussed in this paper.

Through the performance test of screw air compressor by changing work conditions, analyzing the test results, investigating other air compressor basic parameters, several suggestion and reference about the Auxiliary equipment s design and choice of screw air compressor are presented.

In this paper,both basic structure and some features of new airscrew drilling tools are presented,and their application is also thoroughly analyzed.

Through analysing the struction and theory of explosion screw air compressor for coal mine,analysing the safety and economic of the system in usage in front and back,points out the importance that system in the modern well to produce and fix.

Application of screw air compressor oil on electric locomotives;

Screw air compressor oil is developed to meet the requirement that the new type railway passenger locomotive be equipped with screw air compressor.

Aptitude controller of screw air compressor jointly developed by the author and certain air compressor factory are studied.

The paper discusses about the basic performance and the character of oiljet screw air compressor and gives details about the main part and performance parameter of the lubricating oil system, lastly describes the common failures in the lubricating system and the treatment of the problems.