FIELD: oil and gas production.
SUBSTANCE: signal exciting radial resonance frequency vibrations is emitted into pipe-like element. There is measured a resonance frequency characteristic of radial vibrations excited inside the pipe-like element located in a well. There is obtained the resonance frequency characteristic of radial vibrations for at least a connected or not connected reference pipe-like element with the same resonance frequency characteristic as the pipe-like element positioned in a well. The measured frequency characteristic of the pipe-like element placed in the well is compared with the resonance frequency characteristic of radial vibrations for at least the connected or not connected reference pipe-like element. Connection or disconnection of the pipe-like element positioned in well is certified, if its measured resonance frequency characteristic of radial vibrations is approximately the same as for the connected or disconnected reference pipe-like element correspondingly.
EFFECT: upgraded accuracy for determination of quality of connection.
8 cl, 11 dwg
