...Jialin Tian; Haolin Song; Yinglin Yang; Lanhui Mao Conventional directional drilling mainly relies on the sliding of screw motor and drill string to realize the change of wellbore trajectory, so the friction force is large. The use of friction reduction tools that generate axial force to change...

...Arild Saasen; Benny Poedjono; Geir Olav Ånesbug; Nicholas Zachman Magnetic debris in a drilling fluid have a significant influence on the ability of the drilling fluid to maintain its function. Down hole logging can suffer from poor signal to noise ratios. Directional drilling in areas close...