Based on the principle of least squares matrix adjustment, the problem concerning data processing of two-shaft orientation with an additional gyro-side is discussed, and the following questions are also demonstrated.

Analyzed the factors of two-shaft orientation and discussed the influence of the moving of wire rope and assess of Two-shaft Orientatio

The common drilling assembly was introduced used in directional well drilling in the"straight-by-steady-down-stability"phase.

Improvements of normal surface scan algorithm for directional drilling;

This paper mainly introduces the application of naturally-communicated well pair and directional drilling communicated well pair in Jiangxi Salt Mine Co.

During directional drilling,tool face often deviated from the desired direction due to the friction caused by the relative motion(rolling and sliding) between the bit and the formation.

Causes and prevention of eccentric-wear of polymer-flooding directional well rods;

An analytical method for dynamic performance of sucker-rod pumping system of directional well;

Research on lifting technique for shallow directional well and shallow horizontal well in Jilin Oilfield;