Borehole caliper tool using ultrasonic transducer
AssigneeSchlumberger Technology Corporation
InventorsMark A. Fredette, Scott Ritter, Wade D. DuPree, Miguel F. Pabon
Life of this patent
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Abstract
A borehole caliper tool includes a tool body, a bow spring flexibly coupled to the tool body, a target coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, wherein in operation the ultrasonic transducer transmits an acoustic pulse to the target and receives an echo of the acoustic pulse from the target.
Claims21
A borehole caliper tool, comprising:
- a tool body;
- a bow spring flexibly coupled to the tool body;
- a target coupled to the bow spring;
- and
- an ultrasonic transducer coupled to the tool body, wherein in operation the ultrasonic transducer transmits an acoustic pulse to the target and receives an echo of the acoustic pulse from the target.
A borehole caliper tool, comprising:
- a tool body;
- a bow spring disposed on the tool body;
- an ultrasonic transducer coupled to the bow spring;
- and
- an ultrasonic transducer coupled to the tool body, wherein in operation an acoustic pulse is transmitted from one of said ultrasonic transducers for receipt by the other ultrasonic transducer.
A method for gauging a diameter of a borehole, comprising:
- deploying a borehole caliper tool in the borehole, the borehole caliper tool comprising a tool body, a bow spring flexibly coupled to the tool body, a target coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, the borehole caliper tool being deployed such that the bow spring engages with a surface of the borehole;
- and
- generating an acoustic pulse using the ultrasonic transducer;
- receiving an echo of the acoustic pulse from the target;
- determining a time elapsed between generating the acoustic pulse and receiving the echo of the acoustic pulse;
- and
- relating the time elapsed to the diameter of the borehole.
A method for gauging a diameter of a borehole, comprising:
- deploying a borehole caliper tool in the borehole, the borehole caliper tool comprising a tool body, a bow spring flexibly coupled to the tool body, an ultrasonic transducer coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, the borehole caliper tool being deployed such that the bow spring engages with a surface of the borehole;
- and
- generating an acoustic pulse using the ultrasonic transducer coupled to the tool body;
- receiving the acoustic pulse using the ultrasonic transducer coupled to the bow spring;
- determining a time elapsed between generating the acoustic pulse and receiving the acoustic pulse;
- and
- relating the time elapsed to the diameter of the borehole.
A method for gauging a diameter of a borehole, comprising:
- deploying a borehole caliper tool in the borehole, the borehole caliper tool comprising a tool body, a bow spring flexibly coupled to the tool body, an ultrasonic transducer coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, the borehole caliper tool being deployed such that the bow spring engages with a surface of the borehole;
- and
- generating an acoustic pulse using the ultrasonic transducer coupled to the tool bow spring;
- receiving the acoustic pulse using the ultrasonic transducer coupled to the tool body;
- determining a time elapsed between generating the acoustic pulse and receiving the acoustic pulse;
- and
- relating the time elapsed to the diameter of the borehole.
Dependencies are inferred from the claim text.