CN-121995496-A - Acoustic wave detection receiving unit

CN121995496ACN 121995496 ACN121995496 ACN 121995496ACN-121995496-A

Abstract

The invention discloses an acoustic wave detection receiving unit which is applied to the technical field of petroleum logging and comprises a columnar framework, wherein a pressure-bearing bin is arranged in the framework, one end of the pressure-bearing bin in the axial direction of the framework is an opening, the other end of the pressure-bearing bin is a bottom, a plurality of receiving transducer assemblies uniformly distributed in the circumferential direction are arranged on the periphery of the framework, a receiving front-release circuit board assembly is arranged in the pressure-bearing bin and electrically connected with the receiving front-release circuit board assembly, the receiving front-release circuit board assembly comprises a front-release circuit board and a pressure-bearing block welded with the front-release circuit board, and the pressure-bearing block is in sealed connection with the opening of the pressure-bearing bin. Through setting up the front-end circuit board subassembly of receiving in the skeleton inside for receiving transducer subassembly can be close to and front-end circuit board subassembly electricity is connected and make it can effectively improve signal quality and interference immunity, makes sound wave receiver have high signal to noise ratio. And the pressure bearing block is sealed so that the receiving front-discharging circuit board assembly can be suitable for the high-temperature and high-pressure environment of a deep well.

Inventors

DU QUNJIE
QIN XIN
CHAO YONGSHENG
LI MINGGANG
HUANG YUKE
WEN JIANPING
REN YANMIN
TANG HAIQUAN
ZHANG SHOUWEI
FAN JISHENG

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 detection receiving unit is characterized by comprising a columnar framework, wherein a pressure-bearing bin is arranged in the framework, one end of the pressure-bearing bin along the axis direction of the framework is an opening, and the other end of the pressure-bearing bin is a bottom; The outer periphery of the framework is provided with a plurality of receiving transducer assemblies uniformly distributed along the circumferential direction, a receiving front-release circuit board assembly is arranged in the pressure-bearing bin, and the receiving transducer assemblies are electrically connected with the receiving front-release circuit board assembly; the receiving front-placed circuit board assembly comprises a front-placed circuit board and a pressure-bearing block welded with the front-placed circuit board, and the pressure-bearing block is in sealing connection with an opening of the pressure-bearing bin.
2. The acoustic wave detecting and receiving unit according to claim 1, wherein a first end of the front-placed circuit board is fixedly connected with the pressure-bearing block, a second end of the front-placed circuit board opposite to the first end is provided with a sealing disc, a slot is formed in the surface of the sealing disc, and the second end of the front-placed circuit board is inserted into the slot.
3. The acoustic wave detecting and receiving unit according to claim 1, wherein the pressure-receiving block outer peripheral portion is provided with at least one ring of a seal ring in a circumferential direction.
4. The acoustic wave detecting and receiving unit according to claim 1, wherein the pressure-receiving block is provided with a connector penetrating the pressure-receiving block in an axial direction, one end of the connector close to the front pay-off wiring board is welded with a gold finger of the front pay-off wiring board, and one end of the connector away from the front pay-off wiring board protrudes out of a surface of the pressure-receiving block.
5. The acoustic wave detecting and receiving unit according to claim 4, wherein an insulating layer is provided between the pressure-receiving block and the connector.
6. The acoustic wave detecting and receiving unit according to claim 4, further comprising a socket located at a side of the pressure-bearing block away from the front-placed circuit board, wherein a female connector in the socket is correspondingly connected with the connector.
7. The acoustic wave detecting and receiving unit according to claim 6, wherein a side surface of the socket remote from the pressure-receiving block is provided with a wire binding post extending in the axial direction.
8. The acoustic wave detecting and receiving unit according to claim 1, wherein the receiving transducer assembly is fixed to the outer peripheral portion of the skeleton by a fixing rubber sleeve, the fixing rubber sleeve being at least partially located between the receiving transducer assembly and the outer peripheral portion of the skeleton.
9. The acoustic wave detecting and receiving unit according to any one of claims 1 to 8, wherein the receiving transducer assembly includes two piezoelectric ceramic sheets stacked and arranged, 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 detecting and receiving unit according to claim 9, wherein the receiving transducer assembly further comprises a negative electrode conductive sheet that is bonded to an exposed negative side surface of the two piezoelectric ceramic sheets arranged in a stack, and a positive electrode conductive sheet that is bonded to an exposed positive side surface of the two piezoelectric ceramic sheets arranged in a stack.

Description

Acoustic wave detection receiving unit Technical Field The invention relates to the technical field of petroleum logging, in particular to an acoustic wave detection receiving unit. Background The sound wave remote detection receiving unit mainly comprises a plurality of multipolar receiving piezoelectric ceramics, the sound wave receiving piezoelectric ceramics are soaked in silicone oil and are packaged by a pressure balancing device to be isolated from liquid in a well hole, and the pressure and the temperature of the receiving piezoelectric ceramics are basically consistent with those of the well hole. However, as the depth of the well bore increases, the pressure and temperature in the well bore continuously increase, which causes the sensitivity and performance of the piezoelectric ceramics to decrease sharply, and the receiving of acoustic signals, especially in deep wells, cannot be completed accurately. The acoustic wave far detection multipole receiving unit is required to complete the receiving of acoustic wave reflected waves, has high receiving precision and quality requirements on acoustic wave signals, reduces the performance of receiving piezoelectric ceramics in a deep well, and greatly influences the effective receiving of acoustic wave reflected waves. The underground petroleum resource below 7000 m becomes one of the main sites of the current petroleum production, a plurality of areas continuously emerge deep wells above 7000 m and 8000 m, the wells are characterized by high temperature and high pressure, the receiving of the sound wave far detection in the wells is carried out under the condition of sacrificing the signal quality, and the method is extremely unfavorable for the later signal processing and crack judgment. It is an urgent problem to be solved by those skilled in the art how to provide a high signal-to-noise ratio that can realize the acoustic far-detection signal in the high-temperature and high-pressure environment of deep wells. Disclosure of Invention The invention aims to provide an acoustic wave detection receiving unit which can realize high signal-to-noise ratio of an acoustic wave far detection signal in a deep well high-temperature high-pressure environment. In order to solve the technical problems, the invention provides an acoustic wave detection receiving unit, which comprises a columnar framework, wherein a pressure-bearing bin is arranged in the framework, one end of the pressure-bearing bin along the axis direction of the framework is an opening, and the other end of the pressure-bearing bin is a bottom; The outer periphery of the framework is provided with a plurality of receiving transducer assemblies uniformly distributed along the circumferential direction, a receiving front-release circuit board assembly is arranged in the pressure-bearing bin, and the receiving transducer assemblies are electrically connected with the receiving front-release circuit board assembly; the receiving front-placed circuit board assembly comprises a front-placed circuit board and a pressure-bearing block welded with the front-placed circuit board, and the pressure-bearing block is in sealing connection with an opening of the pressure-bearing bin. Optionally, the first end of the front-end circuit board is fixedly connected with the pressure-bearing block, a sealing disc is arranged at a second end of the front-end circuit board opposite to the first end, a slot is arranged on the surface of the sealing disc, and the second end of the front-end circuit board is inserted into the slot. Optionally, at least one circle of sealing ring is arranged on the periphery of the pressure-bearing block along the circumferential direction. Optionally, the pressure-bearing block is provided with a connector penetrating through the pressure-bearing block along the axial direction, one end of the connector, which is close to the front paying-off circuit board, is welded with the golden finger of the front paying-off circuit board, and one end, which is far away from the front paying-off circuit board, of the connector protrudes out of the surface of the pressure-bearing block. Optionally, an insulating layer is disposed between the pressure-bearing block and the connector. Optionally, the connector further comprises a socket located at one side of the pressure-bearing block away from the front-placed circuit board, and a female connector in the socket is correspondingly connected with the connector. Optionally, a binding post extending along the axial direction is disposed on a surface of the socket, which is far away from one side of the pressure-bearing block. Optionally, the receiving transducer assembly is fixed on the outer periphery of the skeleton by a fixing rubber sleeve, and the fixing rubber sleeve is at least partially positioned between the receiving transducer assembly and the outer periphery of the skeleton. Optionally, the receiving transducer assembly includes two piezoelectr