Device for measuring function of blowout preventers, has parallel lines of ultrasonic sensors that are connected with burst transmission unit and booster assembly, where output signals are supplied to output signal amplitude comparison unit

摘要

The device has two parallel lines of ultrasonic sensors (11,14,17) which are connected with a burst transmission unit and a booster assembly. The output signals of the booster assemblies of adjacent sensors are supplied to a unit for the comparison of the amplitudes of the output signals. The sensor lines are arranged in an encasing open to the hydraulic cylinder and make the hydraulic cylinder (41) to contact with a contact unit. The maximal distance of the ultrasound sensors in a sensor line is smaller than the piston length of the hydraulic piston (44) in the blowout preventers. An independent claim is included for a method for measuring the function of blowout preventers with ultrasonic sensors mounted outside lateral to the movement direction, particularly at the metal casing of the hydraulic control unit, for position determination of the movable elements at the blowout preventers.