CN114991754A

CN114991754A - Transducer device and scanning device using same

Info

Publication number: CN114991754A
Application number: CN202210651552.3A
Authority: CN
Inventors: 陶爱华; 王文梁; 张勇; 程林波; 张守林; 牛少男; 李�学; 王明辉
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-02

Abstract

The invention relates to a transducer device and a scanning device using the same, wherein the transducer device comprises: the device shell is internally provided with a containing cavity and comprises a first part and a second part which is fixedly connected with the first part in a sealing way. Wherein, be equipped with on the wall of first part: the oil filling hole, the buffer component and the connector are communicated with the accommodating cavity; the second part is provided with a transmitting and receiving window; and the transducer body is arranged in the accommodating cavity and comprises a transmitting and receiving end, the transmitting and receiving end is arranged towards the transmitting and receiving window and is hermetically fixed in the second part, and the transducer body is electrically connected with the connector. The oil filling hole is used for inputting a hydraulic medium into the accommodating cavity, the buffer assembly is used for balancing pressure difference between the accommodating cavity and the external environment, and the connector is used for being in communication connection and/or power supply connection with the outside. The transducer device can improve the convenience of transducer replacement and improve the application range of the transducer device.

Description

Transducer device and scanning device using same

Technical Field

The invention belongs to the technical field of oil and gas well quality detection, and particularly relates to a transducer device and a scanning device using the transducer device.

Background

After the oil-gas well is built, the corrosion condition of a casing and the cementing quality of cement need to be detected so as to master the integrity condition of a shaft, thereby ensuring the safety of the shaft. The ultrasonic scanning imaging logging technology can simultaneously detect the inner diameter and the wall thickness of a casing and the quality of well cementation cement when the casing is put into a well once, can effectively find the problems of corrosion perforation, cement sheath channeling and the like on the casing when a 360-degree full borehole is covered, and is a very advanced technology. The core device of this technology is the ultrasound transducer.

In the prior art, when a transducer is actually used for detecting the integrity of a shaft, the following problems often exist: 1) to accommodate different sized cannulae, it is often necessary to design the scanning device with different sized outer diameters. In the existing structure, the transducer is usually directly installed in the scanning device, and hydraulic oil is filled in the scanning device, and then the transducer is hydraulically balanced with mud outside the shaft through a hydraulic balancing system. The disadvantage of this construction is that when the transducer needs to be replaced, it must go through several steps, such as oil drain, removing and replacing the transducer, oil filling, etc., making the replacement of the transducer extremely inconvenient,the operation time efficiency is reduced; 2) aiming at a specific sleeve, the transducer with specific frequency needs to be selected in advance, so that the types and the number of the transducers are more, the operation cost is improved, and the applicability of the scanning device is reduced; 3) along with the depth of exploration and development, high-temperature wells with the temperature higher than 175 ℃ are gradually increased, and the temperature resistance of the conventional transducer is generally not higher than 175 ℃, so that the application range of the scanning device is limited, and the exploration and development requirements of the high-temperature high-pressure well cannot be met; 4) the transducer commonly used at present can only be used for the density of 1.9g/cm generally due to the sensitivity limit ³ And the following water-based mud, if the mud is oil-based mud, the application range is narrower (the density cannot be more than 1.4 g/cm) ³ ) Thus, the detection requirements under various environments cannot be better adapted.

Disclosure of Invention

In order to solve all or part of the above problems, the present invention provides a transducer device and a scanning device using the same, so as to improve convenience of transducer replacement and improve an application range thereof.

According to a first aspect of the present invention, there is provided a transducer device comprising: the device casing, its inside is formed with and holds the cavity, and the device casing includes the first portion and with the sealed fixed connection's of first portion second part, wherein, be equipped with on the wall of first portion: the oil filling hole, the buffer assembly and the connector are communicated with the accommodating cavity; the second part is provided with a transmitting and receiving window; and the transducer body is arranged in the accommodating cavity and comprises a transmitting and receiving end, the transmitting and receiving end is arranged towards the transmitting and receiving window and is hermetically fixed in the second part, and the transducer body is electrically connected with the connector. The oil filling hole is used for inputting a hydraulic medium into the accommodating cavity; the buffer assembly is used for balancing the pressure difference between the accommodating cavity and the external environment; the connector is used for carrying out communication connection and/or power supply connection with the outside.

In some embodiments, the interior of the second portion is configured as a mounting cavity matched with the outer peripheral wall of the transmitting and receiving end, wherein an annular groove is formed on the inner peripheral wall of the mounting cavity, a sealing ring is mounted in the annular groove, and the sealing ring is in sealing connection with the outer peripheral wall of the transducer body.

In some embodiments, a retainer ring is fixed to the mounting cavity at a position close to the transmitting and receiving window, and the retainer ring is used for axially limiting the transducer body.

In some embodiments, the cushioning assembly comprises: the buffer cavity is configured into a circular channel, the circular channel is formed on the wall surface of the accommodating cavity body positioned on the first part, and the circular channel is used for communicating the accommodating cavity body with the external environment; a piston assembly sealingly disposed within the circular channel, the piston assembly configured to slide axially relative to the circular channel.

In some embodiments, the transducer body comprises: one end of the transducer shell is fixedly connected with the second part in a sealing way, the other end of the transducer shell is arranged in the accommodating cavity, and an opening is formed on one side of the transducer shell, which faces the transmitting and receiving window; the crystal assembly is arranged in the transducer shell and close to the opening, the crystal assembly is electrically connected with the connector through a lead, and the transmission surface of the crystal assembly is arranged to be parallel to the plane of the opening; the matching layer is arranged in the opening, and meanwhile, the matching layer is attached to and arranged on the transmission surface of the crystal assembly; and the backing is filled in the transducer shell, meanwhile, the backing is attached to the side, opposite to the matching layer, of the crystal assembly, and the matching layer and the backing are used for fixedly connecting the crystal assembly and the transducer shell.

In some embodiments, the crystal assembly includes several crystals, and the material of the crystals is a piezoelectric material.

In some embodiments, the crystal assembly further includes a composite layer for securing the number of crystals, the composite layer configured as an epoxy layer.

In some embodiments, the piezoelectric material is a piezoelectric ceramic, and the crystal is configured to: the piezoelectric ceramic is arranged in a non-periodic and uniform mode by a plurality of columnar piezoelectric ceramics.

In some embodiments, the material of the matching layer is an epoxy material and the material of the transducer housing is polyetheretherketone. According to a second aspect of the present invention, there is provided a scanning apparatus comprising: an instrument housing; a motor disposed inside the instrument housing; one end of the transmission shaft is connected with the motor, and the other end of the transmission shaft extends out of the instrument shell; and a transducer arrangement provided according to the first aspect of the invention. The transducer device is arranged outside the instrument shell, and meanwhile, the transducer device is detachably connected with the end part of the transmission shaft.

The transducer device of the invention has the following advantages:

1) the transducer device can be separated from an internal hydraulic system of a scanning device using the transducer device, so that the transducer device can be constructed into an independent device for use, the transducer device can automatically adapt to underground pressure change, the rapid replacement of the transducer device can be realized, the operation timeliness is improved, and the operation cost is reduced;

2) the transducer body of the transducer device can be combined with the shape and the size of a sleeve to be detected to determine the shape and the size of the transducer body, and can further determine the shape and the size of a required crystal assembly to obtain an excitation signal and a waveform component which are more suitable for the sleeve to be detected, so that the transducer body can obtain a higher echo signal;

3) the transducer body of the transducer device disclosed by the invention is packaged by using high-temperature-resistant epoxy resin and high-temperature-resistant engineering plastic polyetheretherketone, so that the transducer body can still stably and reliably work at about 205 ℃, and meanwhile, the transducer body can have insulation and better mechanical strength, thereby effectively ensuring the service performance of the transducer device.

Drawings

FIG. 1 is a schematic overall structural view of some embodiments of a transducer arrangement of embodiments of the present invention;

FIG. 2 is an exploded view of the transducer assembly shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the transducer assembly shown in FIG. 1;

FIG. 4 is a schematic structural view of the transducer body shown in FIG. 3;

FIG. 5 is a schematic diagram of a scanning device according to some embodiments of the present invention;

fig. 6 is a schematic view illustrating a usage status of a scanning apparatus according to an embodiment of the invention.

Detailed Description

For a better understanding of the objects, structure and function of the invention, a transducer device of the present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the overall structure of some embodiments of a transducer arrangement 100 in accordance with embodiments of the present invention; FIG. 2 is an exploded view of the transducer assembly 100 shown in FIG. 1; fig. 3 is a schematic cross-sectional view of the transducer apparatus 100 shown in fig. 1. As shown in fig. 1 to 3, the transducer device 100 includes: the device shell 1 is internally provided with a containing cavity 13, the device shell 1 comprises a first part 11 and a second part 12 which is fixedly connected with the first part 11 in a sealing way, wherein the wall surface of the first part 11 is provided with: an oil filling hole 14, a buffer assembly 15 and a connector 16 communicated with the accommodating cavity 13; the second portion 12 has a transmitting and receiving window 121 formed thereon; and a transducer body 2 arranged in the accommodating cavity 13, wherein the transducer body 2 comprises a transmitting-receiving end 21, the transmitting-receiving end 21 is arranged towards the transmitting-receiving window 121 and is hermetically fixed in the second part 12, and the transducer body 2 is electrically connected with the connector 16. The oil filler hole 14 is used for feeding hydraulic medium into the accommodating cavity 13. The buffer assembly 15 is used to balance the pressure difference between the accommodating cavity 13 and the external environment. The connector 16 is used for communication and/or power supply connection with the outside.

The device housing 1 mentioned in the present application may be a metal housing. The first part 11 and the second part 12 mentioned in this application can be connected by fasteners such as screws. When in connection, the joint surfaces of the two can be provided with a sealing ring for sealing after the two are connected. The transducer body 2 in the present application is fixed for use within the device housing 1. The transducer body 2 performs transmission of ultrasound and reception of echoes through the transmission and reception window 121. As can be seen from the above description, the oil inlet 14 is used for feeding hydraulic medium into the receiving chamber 13, the damping assembly 15 is used for equalizing the pressure difference between the receiving chamber 13 and the external environment, and the connector 16 is used for communication and/or power supply with the outside. When the transducer device 100 according to the embodiment of the invention is used specifically, after the transducer body 2 is fixed, a filling cavity for hydraulic medium is formed between the transducer body 2 and the first part 11, and oil is injected into the filling cavity through the oil injection hole 14. The buffer assembly 15 balances the internal and external pressures under downhole high temperature and pressure conditions. In this embodiment, the buffer stroke of the buffer assembly 15 may be set, so that the transducer apparatus 100 can still keep the hydraulic oil pressure in the accommodating cavity 13 consistent with the wellbore mud pressure through the buffer assembly 15 in a high-temperature and high-pressure environment, and thus the transducer apparatus 100 always keeps normal operation.

With the above arrangement, the transducer device 100 of the embodiment of the present invention is mainly composed of the transducer body 2 and the device case 1 with the accommodation chamber 13 filled with the hydraulic oil. The transducer device 100 is internally filled with hydraulic oil, and internal and external pressure balance can be realized through the buffer assembly 15, so that an internal hydraulic system of the scanning device 200 using the transducer device can be separated, and the transducer device 100 of the embodiment of the invention can be constructed into an independent device for use, so that the transducer device 100 of the embodiment of the invention can automatically adapt to underground pressure change, and meanwhile, the transducer device 100 can be rapidly disassembled and assembled, thereby improving the replacement efficiency and the operation timeliness.

Referring to fig. 3, in some embodiments, the interior of the second portion 12 may be configured as a mounting cavity that mates with the peripheral wall of the transceiver 21. Wherein, an annular groove 122 is formed on the inner peripheral wall of the mounting cavity, a sealing ring 123 is mounted in the annular groove 122, and the sealing ring 123 is in sealing connection with the outer peripheral wall of the transducer body 2. Through the arrangement, the transducer body 2 can be hermetically mounted only through the sealing ring 123, so that the whole assembly process of the transducer body 2, which is a core component of the transducer device 100 in the embodiment of the invention, is simpler and more convenient, and the mounting efficiency of the transducer body 2 is improved. In addition, the above arrangement is also more convenient and quicker for the replacement of the transducer body 2 for different detection requirements.

Referring to fig. 2 and 3, in some embodiments, a retainer ring 124 may be fixed to the mounting cavity near the transmitting and receiving window 121, and the retainer ring 124 may be used to axially retain the transducer body 2. The transducer device 100 of the present application has a simple overall structure, which not only facilitates and facilitates the assembly of the components, but also reduces the cost of the transducer device 100, thereby making the transducer device 100 of the present invention more suitable for popularization and use.

Referring to fig. 3, in some embodiments, the buffer assembly 15 may include: a buffer chamber 151 configured as a circular passage formed on a wall surface of the accommodation chamber 13 at the first portion 11 for communicating the accommodation chamber 13 with an external environment; and a piston assembly 152 sealingly disposed within the circular channel, the piston assembly 152 configured to slide axially relative to the circular channel.

The piston assembly 152 referred to in this application may include a balance piston 1521 and a wave ring 1522 sleeved on the balance piston 1521. The wave washer 1522 is used to mount the balance piston 1521 within the surge chamber 151. In this application, the balance piston 1521 may move back and forth to balance the internal and external pressures due to the internal and external pressure differences under downhole high temperature and high pressure conditions. Through the specific arrangement of the piston assembly 152, for example, the stroke of the balance piston 1521, the hydraulic oil pressure inside the transducer device 100 of the embodiment of the invention can be kept consistent with the mud pressure of the well bore even under the limit condition of 205 ℃/140MPa, so that the transducer device 100 of the embodiment of the invention can always keep a normal working state.

Referring to fig. 4, in some embodiments, the transducer body 2 may include: a transducer housing 22, one end of which is fixedly connected with the second portion 12 in a sealing manner, and the other end of which is arranged in the accommodating cavity 13, wherein an opening is formed on one side of the transducer housing 22 facing the transmitting and receiving window 121; a crystal assembly 23 disposed within the transducer housing 22 and adjacent the opening, the crystal assembly 23 being electrically connected to the connector 16 by a wire 24, the transmission face of the crystal assembly 23 being disposed parallel to the plane of the opening; a matching layer 25 disposed in the opening, wherein the matching layer 25 is attached to the transmission surface of the crystal assembly 23; and a backing 26 filled in the transducer housing 22, wherein the backing 26 is attached to the side of the crystal assembly 23 opposite to the matching layer 25, and the matching layer 25 and the backing 26 are used for fixedly connecting the crystal assembly 23 and the transducer housing 22.

The transducer body 2 mentioned in the present application may determine the shape and size of the transducer body 2 in combination with the shape and size of the casing to be examined and may further determine the shape and size of the crystal assembly 23 required to obtain an excitation signal and waveform components more adapted to the casing to be examined. For example, a stronger excitation signal and a more unique waveform component can be obtained by determining the shape and size of crystal assembly 23, thereby achieving better detection. The matching layers 25 mentioned in this application may be multi-layered or multi-layered to further maximize the transmission of the ultrasonic signal in the mud environment of the wellbore, thereby enabling the transducer body 2 to obtain a higher echo signal. The matching layer 25 mentioned in the present application serves to increase the sound transmission effect. The backing 26 mentioned in this application acts to absorb the ultrasound waves that are transmitted to the tail.

In some embodiments, the crystal assembly 23 may include a plurality of crystals (not shown), and the material of the crystals is a piezoelectric material.

In some embodiments, the crystal assembly 23 may further include a composite layer (not shown) for fixing several crystals, the composite layer being an epoxy layer.

In some embodiments, the piezoelectric material is a piezoelectric ceramic, and the crystal is configured to: a plurality of columnar piezoelectric ceramics (not shown in the figure) are arranged in a non-periodic and uniform manner.

The crystal assembly 23 referred to in this application may be fabricated by an insert-fill process. The crystal assembly 23 referred to in this application may be a type 1-3 piezoelectric composite. The piezoelectric material referred to in the present application may be piezoelectric ceramics (PZT). The piezoelectric composite material referred to in this application is made by combining a piezoelectric ceramic with a polymer such as an epoxy or other polymer. The non-periodic uniform distribution mentioned in the present application can be understood as that several columnar piezoelectric ceramics are uniformly distributed in an irregular position relationship and in a form without containing a repeating unit, which is compared with the periodic uniform distribution. The periodic uniform distribution contains repeating units and is distributed and arranged in a regular position relation.

Through the setting, the crystal assembly 23 of the application can eliminate the transverse structure vibration mode through the aperiodic uniform distribution of the piezoelectric ceramic (PZT) small columns, so that a pure thickness vibration mode can be obtained, and other performances of the composite material are not changed. Further, by selecting a suitable volume percentage of the piezoelectric phase of the piezoelectric ceramic (PZT) (for example, by selecting the volume percentage of the piezoelectric phase to be 20% to 30%), the acoustic impedance of the crystal assembly 23 (piezoelectric composite material) can be made to be very low (about 3 mrays), so that it is easy to select a suitable epoxy material for the matching layer 25 for radiation, so as to realize efficient transmission and reception of the ultrasonic signal.

For example, for a seawater load, a quarter-wave matching layer 25 is used according to the ultrasound transmission theory, and for a 30% phase volume piezoelectric ceramic (PZT) crystal assembly 23, according to the following equation:

where Z is the characteristic impedance of the quarter-wave matching layer 25, Z _{Water (W)} Is the characteristic impedance of the water load, Z _Compounding Is the characteristic impedance of the crystal assembly 23 (piezoelectric composite).

Z was found to be 2.89Mrayl by calculation using the above formula. The characteristic impedance of 618 epoxy is 2.88Mrayl, which is very close to the value of Z, so that 618 epoxy can be used to make the matching layer 25 of radiation impedance more easily.

Meanwhile, the crystal assembly 23 (piezoelectric composite material) has a large piezoelectric coefficient (about 300-350 pC/N), a moderate dielectric constant (about 250-.

For example, a volume percentage of the phase of the piezoelectric ceramic (PZT) in the crystal assembly 23 (piezoelectric composite) is chosen to be 26%, the matching layer 25 for the radiation impedance of the transducer body 2 is 618 epoxy, and the backing 26 of the transducer body 2 is a mixture of tungsten powder and epoxy. The results of the pulse-echo measurements in fresh water using a 5072PR sharp pulse emitter are shown in the following table:

according to the data, the bandwidth range of the transducer body 2 is 183 kHz-747 kHz, the bandwidth reaches 121%, the echo amplitude is 328mV (attenuation is-20 dB), the loop sensitivity is-34 dB, and the detection requirements of the casing with different wall thicknesses in the underground and under the high attenuation condition are completely met.

As described above, the use of composite materials for the wafer of the transducer body 2 of the present application enables high sensitivity to be ensured while still maintaining a high frequency bandwidth. Under the same test conditions, the sensitivity of the crystal assembly 23 (piezoelectric composite) is at least 10 times higher than that of a conventional ultrasonic piezoelectric ceramic wafer, and therefore, even at a density of 1.85g/cm ³ The pulse echo signal reflected by the inner wall of the casing can be detected under the high attenuation condition of the heavy oil-based mud. The bandwidth of the transducer body 2 exceeds 110%, and the wall thickness of a casing with the thickness of 4.5-15.2 mm can be detected, so that the detection requirements of most of casing wells are met.

In some embodiments, the material of the matching layer 25 may be an epoxy material. The epoxy material may be an epoxy resin. The material of the transducer housing 22 may be polyetheretherketone.

With the above arrangement, the crystal assembly 23 can accommodate operation at high temperatures and pressures, including the arrangement of the crystal structure and the choice of crystal material, as described herein in connection with the crystal. In this application, carry out the encapsulation of transducer body 2 through using high temperature resistant epoxy and high temperature resistant engineering plastics polyether ether ketone to can satisfy transducer body 2 whole still can work reliable and stable when 205 ℃ approximately, simultaneously, can also make transducer body 2 possess insulating and better mechanical strength, thereby guaranteed transducer device 100's performance effectively.

FIG. 5 is a schematic diagram of a scanning device according to some embodiments of the present invention; fig. 6 is a schematic view illustrating a usage status of a scanning apparatus according to an embodiment of the invention. Referring to fig. 5 and 6, according to a second aspect of the present invention, there is provided a scanning apparatus 200, including: an instrument housing 201; a motor 202 disposed inside the instrument case 201; a transmission shaft 203, one end of which is connected with the motor 202 and the other end of which extends out of the instrument shell 201; and a transducer arrangement 100 according to the first aspect of the invention. Wherein the transducer device 100 is arranged outside the instrument housing 201, while the transducer device 100 is detachably connected to the end of the drive shaft 203.

Depending on the actual size of the casing, the outer diameter of the scanning device 200 may need to be of several sizes, so that the scanning device 200 is kept at a distance from the inner wall of the casing while working downhole to ensure that a usable ultrasonic reflection signal is received. It is usually necessary to maintain a value of between 25mm and 50 mm. Thus, when a logging job requires the inspection of different casing sizes, the scanner 200 of different outer diameters needs to be replaced on site. In the prior art, the transducer is immersed in hydraulic oil in the scanning device 200, so that the transducer needs to be replaced by oil drainage, disassembly, replacement, installation, oil injection and other steps at each time, and the method is very tedious and time-consuming. The scanning device 200 according to the embodiment of the present invention sets the transducer device 100 as a separate device, which does not need to communicate with the hydraulic oil inside the scanning device 200 to achieve the balance between the internal pressure and the external pressure, and therefore, the present application may design the connection portion between the transducer device 100 and the transmission shaft 203 of the scanning device 200 as a nut-nut docking structure. Therefore, the rapid butt joint can be realized on site, which is very rapid and convenient, thereby improving the operation timeliness of the scanning device 200.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A transducer arrangement, comprising:

the device casing, its inside is formed with and holds the cavity, the device casing include the first portion and with the sealed fixed connection's of first portion second part, wherein, be equipped with on the wall of first portion: the oil filling hole, the buffer assembly and the connector are communicated with the accommodating cavity; the second part is provided with a transmitting and receiving window; and

the energy converter body is arranged in the accommodating cavity and comprises a transmitting and receiving end, the transmitting and receiving end is arranged towards the transmitting and receiving window and is hermetically fixed in the second part, and the energy converter body is electrically connected with the connector;

the oil filling hole is used for inputting a hydraulic medium into the accommodating cavity; the buffer assembly is used for balancing the pressure difference between the accommodating cavity and the external environment; the connector is used for carrying out communication connection and/or power supply connection with the outside.

2. The transducer device according to claim 1, wherein the second portion is internally configured as a mounting cavity matching with the outer peripheral wall of the transmitting and receiving end, wherein an annular groove is formed on the inner peripheral wall of the mounting cavity, and a sealing ring is mounted in the annular groove and forms a sealing connection with the outer peripheral wall of the transducer body.

3. The transducer assembly of claim 2, wherein a retainer ring is fixed to the mounting cavity adjacent to the transceiver window, the retainer ring being configured to axially retain the transducer body.

4. The transducer arrangement of claim 1, wherein the damping assembly comprises:

a buffer chamber configured as a circular passage formed on a wall surface of the accommodation chamber at the first portion, the circular passage for communicating the accommodation chamber with an external environment;

a piston assembly sealingly disposed within the circular channel, the piston assembly configured to slide axially relative to the circular channel.

5. The transducer arrangement according to any of claims 1 to 4, wherein the transducer body comprises:

one end of the transducer shell is hermetically fixed with the second part, the other end of the transducer shell is arranged in the accommodating cavity, and an opening is formed in one side, facing the transmitting and receiving window, of the transducer shell;

the crystal assembly is arranged in the transducer shell and close to the opening, the crystal assembly is electrically connected with the connector through a lead, and a transmission surface of the crystal assembly is arranged to be parallel to a plane where the opening is located;

the matching layer is arranged in the opening, and meanwhile, the matching layer is attached to and arranged on the transmission surface of the crystal assembly;

and the backing is filled in the transducer shell, meanwhile, the backing is attached and arranged on the opposite side of the crystal component and the matching layer, and the matching layer and the backing are used for fixedly connecting the crystal component and the transducer shell.

6. The transducer arrangement of claim 5, wherein the crystal assembly comprises a plurality of crystals, the material of the crystals being a piezoelectric material.

7. The transducer arrangement of claim 6, wherein the crystal assembly further comprises a composite layer for securing the number of crystals, the composite layer configured as an epoxy layer.

8. The transducer arrangement of claim 7, wherein the piezoelectric material is a piezoelectric ceramic, the crystal being configured to: the piezoelectric ceramics in a plurality of columns are arranged in a non-periodic and uniform distribution mode.

9. The transducer arrangement according to claim 5, wherein the material of the matching layer is an epoxy material and the material of the transducer housing is polyetheretherketone.

10. A scanning device, comprising:

an instrument housing;

a motor disposed inside the instrument housing;

one end of the transmission shaft is connected with the motor, and the other end of the transmission shaft extends out of the instrument shell;

the transducer arrangement according to any of claims 1-9;

wherein, the transducer device is arranged outside the instrument shell, and meanwhile, the transducer device is detachably connected with the end part of the transmission shaft.