The invention relates to a turbo-type underground hydraulic oscillator, and belongs to the technical field of
petroleum underground equipment. The turbo-type underground hydraulic oscillator comprises an upper shell, a lower shell, an
upper joint, a lower joint, a spline housing and a middle joint, wherein the upper shell is connected with the lower shell by
screw thread by the middle joint, the lower joint is mounted by screw threads at the end of the lower shell, and the
upper joint is mounted by screw threads at the end of the upper shell via the spline housing; a
turbine shaft is mounted in the lower shell by an end cap of the
turbine shaft and a
thrust bearing. The hydraulic oscillator is driven by a
turbine and does not have transverse oscillation caused by eccentric motion, so that the hydraulic oscillator does not have an effect on
signal acquisition work of tools such as an LWD (
Logging-While-Drilling) tool, an MWD (Measurement-While-Drilling) tool and the like; through own axial periodic high-frequency creeping, the friction condition between a drilling string and a borehole wall is changed, and the increasing speed of the coefficient of instantaneous sliding friction when a
drill bit is elastically fed by the drilling string is lowered, thereby reducing friction resistance and improving mechanical drilling speed.