Abstract: In the oil and gas drilling engineering, measurementwhiledrilling (MWD) system is usually used to provide realtime monitoring of the position and orientation of the bottom hole. Particularly in the rotary steerable drilling ...

Abstract: Axial excitation tools (AETs) have the ability to improve slide-drilling efficiency by reducing the friction between the drillstring and the wellbore wall. However, drag-reduction effects are not always satisfactory, and ...