LOW-NOISE ULTRASONIC TRANSDUCER FOR USE IN WELLBORE OPERATIONS

原文（中国語）

An ultrasonic transducer for use in a downhole wellbore environment is disclosed. The ultrasonic transducer can utilize a piezoelectric element located in a housing comprising an inner housing and an outer housing separated by an air gap. The air gap functions to block undesirable ultrasonic waves from exiting or being received by the ultrasonic receiver and resulting in signal noise. For example, the air gap can prevent ultrasonic waves generated by the piezoelectric element from exiting the housing through a side or rear thereof, and can prevent reflected ultrasonic waves from being received by the ultrasonic transducer through a side or rear of the housing. The air gap may contain a gas or a fluid, or the air gap may be evacuated. The ultrasonic transducer may be a component of a downhole tool, such as a logging-while-drilling tool, or a post-drilling operation tool, such as a wireline tool.