Drilling fluid circulation jar slows down undulant device of liquid level

The utility model discloses a drilling fluid circulation jar slows down undulant device of liquid level, include hollow cylinder, float the floating block subassembly on the drilling fluid and be used for fixing the fixing device of cylinder, the cylinder upwards is provided with an at least gap and/or a plurality of through -hole along the bottom, fixing device with cylinder upper end fixed connection, the floating block subassembly slides and sets up in the cylinder, the floating block subassembly including set gradually from top to bottom be used for reflected ultrasonic waves circular reflecting disc and with the same spheroid of circle diameter of drum, circular reflecting disc with diameter of drum is the same for the circle, circular reflecting disc with spheroid fixed connection, the utility model discloses simple structure, preparation convenience and with low costs is placed the cylinder in the drilling fluid circulates the jar, and ultrasonic liquid level sensor monitors drilling fluid circulation