Apparatus and method for measuring the acoustic impedance of wellbore fluids

摘要

An ultrasonic scanner tool employs a transducer that excites a target plate at a known distance from the transducer. One side of the target plate forms a chamber that in operation is filled with wellbore fluid. On the other side of the target plate, a chamber is formed containing a vacuum or a fluid with a significantly lower acoustic impedance than the wellbore fluid and the target plate, allowing an improved measurement of the acoustic impedance of the wellbore fluid. 3/12 ,_ 300 COMPENSATOR CENTRALIZED MUD TRANSDUCER ELECTRONICS ASSY 320 60 CENTRALIZER INTERCHANGEABLE