Hydraulic oscillator structure of drilling tool
The hydraulic oscillator is mainly composed of three parts:
(1) Oscillation sub; (2) Power section; (3) Valve and bearing system.

The hydraulic oscillator can improve the effectiveness of the WOB transmission during drilling and reduce the friction between the bottom hole and the wellbore through the longitudinal vibration generated by itself, which means that the hydraulic oscillator can be used in various drilling modes. , especially in directional drilling using power drilling tools to improve the transmission of WOB, reduce the possibility of sticking of the drilling tool assembly, and reduce torsional vibration.
With the increase in the number of extended-reach wells and the continuous extension of horizontal displacement, their drilling mode is facing greater challenges. NOV’s hydraulic oscillator solves this problem in a simple and effective way, and proposes a unique and effective way . Smooth WOB transmission, even in complex formations with large azimuth changes, improve the ability to adjust the tool face of the drill bit, so that the drilling can reach farther target layers; it does not require too much work to adjust the tool during drilling face, maintain the stability of the tool face and increase the ROP.