The article mainly analyses the being problemis of the present labour controversial arbitration system,puts forward a better way called a system of distribution between ruling and adjudication.

The author points out the necessity of perfection of labor arbitrating law It s necessary and possible to enact arbitrating-judging dividing system.

Based on the studies on technologies and applications of branch well home and abroad, the problems existing in the technologies for branch well in Liaohe Oilfield and the corresponding ones which are need to solve are pointed out in this paper, including the designing of branch well path, path control and well completion.

The hardware-in-loop simulation research about trajectory control on hydraulic excavator;

Techniques of trajectory control and liner running-in of the shallow multi-target horizontal well

The paper presented the profile optimizing technique,make-up of string,trajectory control technique,and MWD GAMMA geologic survey technique.