Sound wave remote measuring sound insulator following drilling

A technology of sound insulation and sound wave, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., and can solve problems such as interference of sound wave signal transmission while drilling
CN103806903AInactive Publication Date: 2014-05-21XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2014-05-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

A sound wave remote measuring sound insulator following drilling is formed by connecting five hollow cylindrical rods with different cross sections and two conical rods, an input end connector and an output end connector of the sound insulator are both NC 50 standard threaded connectors, the length of the whole sound insulator is 8686.8 mm, and the largest cross section radius of the sound insulator is 89 mm and is kept consistent with the length of a standard drill rod. On the basis of the longitudinal wave vibration transmission theory and through transmission and reflection of sound waves passing through the hollow cylindrical rods with different cross sections, sound wave signals within a certain frequency range can be made to generate large attenuation, the parts, with the cross sections gradually changing, of the conical rods have the stress dispersion effect, mechanical strength of a connection and transition segment of a drilling column is guaranteed, meanwhile, sound transmission loss of the sound insulator is obtained in a combined mode, the attenuation band frequency domain of the sound insulator is obtained, suppression of drill collar mode waves excited by a monopole sound source on stratum longitudinal waves excited by a transmitting transducer is eliminated, and technological support is provided for application of sound wave remote measuring following drilling to underground engineering.
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Description

technical field

[0001] The invention relates to the technical field of acoustic wave telemetry while drilling, in particular to a sound insulation body for acoustic wave telemetry while drilling. Background technique

[0002] Acoustic telemetry while drilling has achieved good results in production wells, but in the process of oil drilling, research still needs to be done. In comparison, the noise generated by the drill tool assembly and the drill bit during the drilling process is uploaded to the acoustic wave transmission channel while drilling, which interferes with the transmission of the acoustic wave signal while drilling.

[0003] The acoustic wave telemetry instrument while drilling is mainly composed of acoustic wave transmitting transducer, receiving transducer, sound insulation body and supporting electronic circuit and other parts. When the acoustic wave signal generated by the acoustic wave transmitting transducer propagates along the drill pipe to the ground, ...

Claims

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