The JQ-YS type two-way hydraulic shock absorber is a shock absorber that can simultaneously slow or eliminate the longitudinal and circumferential vibration of the drill string.

JQ-JY type mechanical hydraulic shock absorber is a new type of double-acting shock absorber, which absorbs the runout and vibration of the drilling tool through two damping elastic elements点。

The internal blowout preventer is a large pressure drop check valve, the valve conical plug, reduce the cutting effect of mud on the valve seat, to ensure the correct closing state.

Bypass valve, also known as three-way valve, is a commonly used fluid control device, mainly used to regulate the flow and flow direction of fluid in pipelines.