CN-121995495-A - Acoustic wave receiver

CN121995495ACN 121995495 ACN121995495 ACN 121995495ACN-121995495-A

Abstract

The invention discloses an acoustic wave receiver which is applied to the technical field of petroleum logging and comprises a columnar framework, wherein a plurality of grooves are formed in the periphery of the framework and are uniformly distributed along the circumferential direction of the framework, a support is arranged in the grooves and divides the grooves into a first cavity and a second cavity, a receiving transducer assembly is arranged in the first cavity, a receiving front-end circuit board assembly is arranged in the second cavity, and the receiving transducer assembly in the same groove is electrically connected with the receiving front-end circuit board assembly. Through setting up near the receiving transducer subassembly and the preceding circuit board subassembly of electric connection at the skeleton surface for the signal filtering optimization and the amplification reinforcing of preceding circuit board subassembly can be carried out to the signal transmission by the signal transmission of receiving transducer subassembly through a section very short distance, and it can effectively improve signal quality and interference immunity ability, makes the sound wave receiver have high signal to noise ratio.

Inventors

DU QUNJIE
FAN JISHENG
CHAO YONGSHENG
ZHANG SHOUWEI
WEN JIANPING
LI MINGGANG
HUANG YUKE
XU DAHUA
XU XIAOKAI
ZHANG YU

Assignees

中国石油化工集团有限公司
中石化石油工程技术服务股份有限公司
中石化经纬有限公司
中石化经纬有限公司地质测控技术研究院

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. The sound wave receiver is characterized by comprising a columnar framework, wherein a plurality of grooves are formed in the periphery of the framework, and the grooves are uniformly distributed along the circumferential direction of the framework; The device comprises a groove, and is characterized in that a support is arranged in the groove, the support divides the groove into a first cavity and a second cavity, the first cavity is provided with a receiving transducer assembly, the second cavity is provided with a receiving front-end circuit board assembly, and the receiving transducer assemblies in the same groove are electrically connected with the receiving front-end circuit board assembly.
2. The acoustic wave receiver of claim 1 wherein the bracket divides the recess into a first cavity and a second cavity overlapping in a radial direction, the first cavity being located on a side of the second cavity remote from the center of the backbone.
3. The acoustic wave receiver of claim 2 wherein the receiving transducer assembly is secured to the first cavity by a transducer spacer that fills a gap between the receiving transducer assembly and the first cavity.
4. The acoustic wave receiver of claim 2, wherein the receive front-end circuit board assembly is secured to the second cavity by a circuit board spacer located between the receive front-end circuit board assembly and the backbone in a radial direction.
5. The acoustic wave receiver of claim 1, wherein the side walls of the skeleton forming the grooves are provided with through holes for routing.
6. The acoustic wave receiver according to claim 5, wherein the through hole extends from the groove to at least one side end face of the skeleton in the axial direction.
7. The acoustic wave receiver according to claim 1, wherein the outer peripheral portion of the skeleton is provided with a receiving wiring board wiring groove, and the receiving wiring board wiring groove is located between adjacent grooves and communicates with adjacent second cavities.
8. The acoustic wave receiver according to claim 1, wherein the skeleton includes a through-hole penetrating the skeleton in the axial direction, the through-hole having a fixing cord provided therein.
9. The acoustic wave receiver according to any one of claims 1 to 8, wherein the receiving transducer assembly includes two piezoelectric ceramic sheets disposed in a stacked manner, the piezoelectric ceramic sheets being polarized in a thickness direction; the positive electrode side surface of one piezoelectric ceramic plate is contacted with the negative electrode side surface of the other piezoelectric ceramic plate and is electrically connected with the negative electrode side surface of the other piezoelectric ceramic plate, so that the two piezoelectric ceramic plates are connected in series.
10. The acoustic wave receiver of claim 9, wherein the receiving transducer assembly further comprises a negative electrode conductive sheet that conforms to an exposed negative side surface of the two piezoelectric ceramic sheets of the stack arrangement and a positive electrode conductive sheet that conforms to an exposed positive side surface of the two piezoelectric ceramic sheets of the stack arrangement.

Description

Acoustic wave receiver Technical Field The invention relates to the technical field of petroleum logging, in particular to an acoustic wave receiver. Background The acoustic wave receiving unit of the acoustic wave far detecting instrument is usually formed by parallel connection of sheet piezoelectric ceramics to form an independent multipolar receiving transducer unit, and then the multipolar receiving transducer unit is sent to a receiving circuit through a longer signal cable. In addition, because the signals need to be transmitted for a long distance, the signals are extremely easy to be subjected to strong electromagnetic interference generated in the external and acoustic wave transmitting process, and the independent receiving unit is not suitable for an acoustic wave far-detection instrument to receive weak acoustic wave signals or reflected acoustic wave signals from the outside of the well. In addition, the receiving unit structure adopts a sheet piezoelectric ceramic and metal framework double-layer structure, so that acoustic wave signals in different directions are difficult to attenuate, and the direction of a multipolar acoustic wave signal remotely detected by acoustic waves is difficult to distinguish. How to provide an acoustic wave receiver with a high signal-to-noise ratio is a matter that the person skilled in the art is urgent to solve. Disclosure of Invention It is an object of the invention to provide an acoustic wave receiver with a high signal-to-noise ratio. In order to solve the technical problems, the invention provides an acoustic wave receiver, which comprises a columnar framework, wherein a plurality of grooves are formed on the periphery of the framework, and the grooves are uniformly distributed along the circumferential direction of the framework; The device comprises a groove, and is characterized in that a support is arranged in the groove, the support divides the groove into a first cavity and a second cavity, the first cavity is provided with a receiving transducer assembly, the second cavity is provided with a receiving front-end circuit board assembly, and the receiving transducer assemblies in the same groove are electrically connected with the receiving front-end circuit board assembly. Optionally, the support divides the groove into a first cavity and a second cavity which overlap along a radial direction, and the first cavity is located at one side of the second cavity away from the center of the skeleton. Optionally, the receiving transducer assembly is fixed to the first cavity by a transducer spacer, and the transducer spacer fills a gap between the receiving transducer assembly and the first cavity. Optionally, the receiving front-end circuit board assembly is fixed to the second cavity through a circuit board gasket, and the circuit board gasket is located between the receiving front-end circuit board assembly and the skeleton along a radial direction. Optionally, the side wall of the groove formed by the framework is provided with a through hole for routing. Optionally, the through hole extends from the groove to at least one side end face of the skeleton in the axial direction. Optionally, the periphery of skeleton is provided with and receives the circuit board wiring groove, receive circuit board wiring groove and be located adjacent between the recess intercommunication is adjacent the second cavity. Optionally, the skeleton includes along the axis direction runs through the through-hole of skeleton, be provided with the fixed cable in the through-hole. Optionally, the receiving transducer assembly includes two piezoelectric ceramic plates stacked, and the piezoelectric ceramic plates are polarized along a thickness direction; the positive electrode side surface of one piezoelectric ceramic plate is contacted with the negative electrode side surface of the other piezoelectric ceramic plate and is electrically connected with the negative electrode side surface of the other piezoelectric ceramic plate, so that the two piezoelectric ceramic plates are connected in series. Optionally, the receiving transducer assembly further includes a negative electrode conductive sheet and a positive electrode conductive sheet, the negative electrode conductive sheet is attached to a surface of a bare negative electrode side of the two piezoelectric ceramic sheets arranged in a lamination manner, and the positive electrode conductive sheet is attached to a surface of a bare positive electrode side of the two piezoelectric ceramic sheets arranged in a lamination manner. The invention provides an acoustic wave receiver which comprises a columnar framework, wherein a plurality of grooves are formed in the periphery of the framework and are uniformly distributed along the circumferential direction of the framework, a support is arranged in the grooves and divides the grooves into a first cavity and a second cavity, a receiving transducer assembly is arranged in the first ca