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AssigneeChina Oilfield Services Limited
InventorsZhifeng SUN, Huatao LU, Ya JIN, Xien LIU, Jie LI
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This disclosure discloses a testing apparatus and method for casing damage while drilling and cementing quality evaluation, which addresses technical challenges such as low well-logging efficiency, poor testing accuracy, and the difficulty in evaluating the cementing quality at the outer interface of the cement sheath. The apparatus comprises a drill collar sub, an ultrasonic probe, and a plurality of ultrasonic transducers; the excitation frequency of the ultrasonic probe is adjustable through an external control module; the plurality of ultrasonic transducers has respective center frequencies that are different from others, and the center frequencies progressively increase.
A testing apparatus for casing damage while drilling and cementing quality evaluation, comprising:
Dependencies are inferred from the claim text.